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      Chevy 882 heads flow numbers. I also have a set of 993's off a 72 350.



      • Chevy 882 heads flow numbers Nov 29, 2003 · The 624 heads are among the worst of the worst. 700" Intake / Exhaust. 700 "or greater lift, and to get those high lift numbers it will be down on air flow in low mid lift range when compared to another head that was designed to allow rework to those Feb 16, 2007 · They flow low 200s-220s with 2. The 113 'Vette head is virtually identical to the Cylinder Head Flow Data At 28" H2O Chevy Manufacturer /Part Number Port/Vol Intake / Exhaust Valve Size Intake / Exhaust Combust. They are thin wall smog castings that are given to cracking on top of having port poor flow and combustion characteristics. Chevy heads had 2. My heads have had some work done them I will be building a 383 next month with flat top pistons. 882 heads were designed by Chevy to be used in 350 ci and 400 ci engines. Sep 18, 2017 · The 882 and the 487 have very similar flow figures when in stock form using the stock 1. Regarding 993 Chevy heads, these castings with valve sizes were either 1. 02/l. sources. The 1947 - Present 882 heads Web May 9, 2008 · The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board 882 heads Web May 9, 2008 · 882 heads The 1967 - 1972 Chevrolet & GMC Pickups Message Board. By the looks of those heads they have been sitting around for a long time. 028 thickness Jun 4, 2021 · I’m doing a low $$$ 307 Chevy build with leftover parts and I have a low mile set of 193 swirl port heads that are the best heads I can come up with without spending any $$$. 5 to 1 with a 64cc head. 50" lift springs and 1. The 882 castings had a double heat-riser passage [single on the intake side, double on the exhaust side] and were prone to cracking because they ran so May 9, 2008 · The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board 882 heads Web 67-72chevytrucks. They came from GM parts, if not a complete crate engine. It's not cost effective to angle mill these poor heads to get compression. Just good info IMHO. 60 valves. And considering the lack of interest by aftermarket makers to expand on their lineup for the Vortec heads, I wont be rushing out to buy them. regards Arne Dec 18, 2007 · I would not use the -896 heads on the 350, on the 283 yes. Description: 71-82 Chevy SBC 400 882/997 Cylinder Head. The 1969-70 350/300 with it's 10. I also have a set of 993's off a 72 350. Some from their Web Site updated Aug. Apr 25, 2010 · My ported peak intake flow was just a tad lower than yours. Mar 7, 2005 · The exhaust port on these heads is rather weak in my humble opinion, and is not considered to be a good performance head. 2 120 107. What about application what were these heads original to? Jan 24, 2015 · A really good set of ported 292 heads with a 2. forget the 3 angle valve job go with a 5 angle with hardened seats. 94s. grasmo. But I used them with a good piston to build compression and 2. 480 with a 750 cfm and single plane. 600 lift even stock vortec heads with some port and bowl clean-up should flow about 230 cfm at . This may not seem like much of an improvement over the older iron heads like a 441 or 882 head, but the chamber offers potential that can only be measured on the engine rather than on a flow bench. Mar 7, 2003 · C3 Tech/Performance - 882 vs. *2 -- These flow numbers come from Pace GM Parts. I've heard these are actually descent heads and they flow ok considering they are off a 305. This needs to be 8. Mar 18, 2003 · Does anyone have the valve sizes, flow numbers, etc for factory 882 heads for a '77 or know where I can find them? Thanks in advance :cheers: Sep 24, 2008 · The 882 head may have out-flowed this head but with the addition of larger 2. 6 which sucks and hurts performance which also limits a great cam, so for a just cam swap with a heavier truck as the Elky is with not to much of a stall I would probably limit cam to a 268 hyd from Comp, have installed quite a few with about Oct 6, 2006 · So they are non-swirl heads, have 1. Can't remember for sure. These head castings were used in various other models of the Chevrolet lineup such as the passenger car, Chevy II/Nova, Camaro and Corvette. So I'm kinda trying to fix one problem and still be able to use the new heads later. also radius the exhaust ports and bowl blend if possible. They yield average flow numbers, but respond to modifications just like any other small block head. I seem to remember 993's were second best. They were cracked so I put a set of 487 heads on it until the replacement 882's were found She wanted it numbers correct. The 3917292 was found on 1968 327 and 350 engines, had 1. The only number that look right are the 350 smoggers `338` casting. Jan 1, 2005 · I got a set of cylinder heads 3973487X they have 1. Chamber Volume. My boss has a set of 487 heads that were run on a race car engine for one season. So lets just leave it at that. Sep 18, 2013 · The 187 casting head is not a `TPI `head. 02-inch intake valves and some decent pocket port work these heads will out flow the 882’s. My ported 305 heads flow more than stock vortec heads do out of the box. May 9, 2008 · 882's aren't bad heads; the flow numbers are relatively good. Thats to much for a mild cam and pump gas. Your going to see anywhere from 50-80 HP, or more, increase as a wild guess bolting on those heads. Re: 333882 heads? 11-07-05 01:53 PM - Post# 811260 In response to mr wabbit I hope I didnt offend any of you guys, that was not my intention. Feb 11, 2012 · heads and cam Well for starters the 882 heads have a large chamber size of 76cc and they flow alright but hurt the compression of down to about 8. That is the benefit of aftermarket heads. This head would be best fitted on a big-inch street big block using a large cam that could take advantage of this head’s high lift flow potential. Jan 3, 2021 · The Vortec heads do have great flow numbers. 94/1. Jun 26, 2000 · It's been maybe 10 years since Hot Rod Magazine did their "Head of the Class" article on small block chevy head flows. 50, 600cfm edelbrock carb, Performer RPM intake, headers with Flowmaster 40 series mufflers dumped befor rear end, and 1. The S/R Heads and the S/R Torquers are exactly the same casting. 416 heads are 305 heads and i'd take those over 882's any day. 300" Intake / Exhaust. I just found this a few years back and It was informative. Casting number is 3973487. 036 quench. 52 rockers. 020 and use a GM head gasket with . You need a very healthy cam to pull it Aug 16, 2024 · going from a 76cc head to a 64cc will add about 1. Jan 1, 2023 · Our lineup of small-block Chevy production heads is (from left to right): 128 ('87 Corvette), 882, 487, 126, 441, 993, 113 ('88-'89 Corvette). Enough to feel a difference but not enough to buy 100 octane Jan 10, 2002 · "In 1975, a lighter head was released sporting 1. The engine part number is 12353641. There are different variations of the 882 head, which has been stated already. 400" lift. 4 to 0. but the cost of the new vortec style intake could bust the budget, and the the rocker arms need to self aligning style Jan 5, 2016 · 441 heads are good flowing heads. They flow a lot better and are only slightly more money. Apr 24, 2010 · The 882 heads are fine if you just want a engine that runs. 882's are a marginal head so good for a marginal street engine. i would say you'ld be okay as they have 1. [QUOTE=Vortecs are darn good heads but not the best in every situation, small chambers may give to much compression depending on the combo and the lack of a heat riser can be a problem in colder climates. I'm afraid the heads might need alot of work. as the port swirl induced by the vane is low. Dec 17, 2018 · My guess- slightly better than a flat head. Flow on them isn't that great stock (185/120 cfm int/exh flow at 0. Apr 30, 2010 · I found a set of reman 333882 heads with 2. I'm just wondering, from someone who has worked with them or tried to, if they are decent enough for a truck 383. 02 1. I`m going to run a . 96 valves, 3 angle valve job with . different valve jobs can change those numbers a bit. Many classes of dirt track racing are restricted to these large chamber heads and the racers are looking for this casting number specifically. 02/1. The most popular bench is the Super Flow 600. 25:1 compression ratio 63. Those heads are old smogger type and most of them all flowed really close to each other Usually in the low 200's like 205 cfm and exhaust side in the 145 area. well, they're part of the May 19, 2010 · The exh can be made to go over 200 cfm but it take alot of hard to come by detail work in conjuction with the needed valve job specs. They are equipped with 2. Jan 25, 2005 · Found out one of my 882 heads was cracked in the valve seat area. 02" / 1. 60 May 12, 2023 · The 906 and 062 Vortec heads are two popular cylinder head options used in small-block Chevy engines. 9 Jul 11, 2005 · The 291's are the old double humps with 1. How much do you want to spend? Mar 9, 2012 · We build quite a few engines that require a stock casting head. Feb 3, 2008 · The 350 that I have in the car now has 882's on it. But just a moment, you’re a beginner and you don’t have a flow bench. the trouble i ran into was needing a bore job and the cost for all that plus installing cam bearings, hot tank, deck the block, was $250. Flow will be close to the same. 60 valves and made about 465 hp out of a 355 with them. I believe it is a different casting number, but the difference is really is that they are "cleaned up" - CNC'ed and flow in the 240 range from GM. 64cc's on the double humps. Common Chevy Head Casting Symbols Feb 27, 2003 · There is no question that the Vortec head will cost more and run better than the 882's. THese heads in stock form flow a lot less than that. 50 E valves. Only Chevelle-specific information is listed here to conserve space. I've also found a 1967 327 block complete to put in my car and I want a set of heads that can be transfered over to that motor til I can afford to get the Trick Flow 23's. This head was tested with the 1. A good head for a 350 that is affordable is a dart 180cc iron eagle then go buy your own parts, manley street flow valves or your stock 2. 84 valves. that can be reshaped to make them flow like older "performance" double hump heads. Sep 26, 2014 · You really need to cc the head chambers to see what they actually are. You won;t see the flow limiting effect of the swirl vane when tested at low test pressures. 008. of torque everywhere in the rev range. While from the charts the 882 is "not too bad" for flow compared to other iron heads, I think you have to take those numbers with a grain of salt. 450 on lift. Most flow numbers for BMF heads come from their Web Site updated Aug. 50 valves. 882's are plentiful, but I have heard the debate go both ways on how well they flow. Aug 3, 2001 · The "041" head was a 1969-1970 high performance head, with the same exact performance characteristics as both the "186" and "187" Camel (double) Hump heads. Re: What you think about 376450 heads 05-04-03 02:58 PM - Post# 223130 In response to Jare I just had a set reworked with 1. Aug 26, 2014 · next time you have access to the later vortec style intake gaskets (even old used ones) and a 1955-85 first generation cylinder head ,or first gen intake gaskets and a vortec cylinder head, take the time to line up the bolt holes on the gasket and cylinder heads, I thing you may be rather amazed at the differences in port size and locations. 1 point of compression which helps power at every rpm from idle on up, Weingartner flowed the intake port on an 882 head and measured 202 cfm at . If you use these heads in place of a camel hump head it will lower the compression due to these have a larger combustion Feb 23, 2007 · You can get flow numbers for most common stock and performance heads from Stan Weiss's Cylinder Head Database. 5 and 2. 6 valves, just depended upon which vehicle GM put them in. Keep in mind that with a small 155cc port volume these heads are great for making torque. 100" Intake / Exhaust. Maybe too good for your 283. 1 SBC blocks Jun 14, 2021 · I'm going to use the 882 heads as the first example. 500 lift on the same flow bench, cheaper aftermarket heads might flow 10 cfm less with Feb 11, 2021 · How would a head from 1973 be correct for a restoration on a 67 327 block? Beside the point. Now Ive seen combos over the internet using 882 heads/ 383 stroker with similar cam specs And im finding numbers that are much lower. 800" Intake / Exhaust. Oct 20, 2008 · My 350 has . Dec 10, 2020 · Look here for some typical flow numbers on GM and aftermarket SBC heads: Stan Weiss' - Cylinder Head Flow Data at 28 Inches of Water -- DFW / FLW Flow Files for use with Engine Simulation Software You'll see that one ported set of 487's flowed about 235cfm and another was around 220cfm. " I had a set of 487X heads on my '73 Hatchback Custom 20-something years ago, which I *think* were factory heads that came with the car. with a 3. My headers are Doug Thorley Tri Ys with 2 1/2 inch collectors. 00 for the set ready to bolt on. Aug 14, 2005 · The 882 head is the most produced chevy cylinder head over and above all other casting numbers. -----375hp 78 Chevy truck 77 Chevy Nova 95 Chevy Lumina 3. Not even W/Products seems to have numbers on their 1. I also did not port mine to the max for the same reason. 0:1 compression ratio 76. A rectangle port Rat head always outflows a small-block head on the flow bench, but with a monstrous 3. I don't think the flow is the major problem with the 882s for the power levels your after. Also, and I think this is a big deal. valves and no port work done to them would a cam with 425 lift give up some power rather then using a 450 lift. Jun 7, 2004 · I had a set rebuilt then after rebuilding them i went with the vortec heads. You can do it too. I'd love to see the two compared, so as to see at what point in lift, the 2. I assume that the 882 refers to the serial number 333882. I think the reason this is common on both heads is that the 70s engines were set up with lean mixtures and retarded timing to get the exhaust temperatures higher for the early style catalytic converters. All of the old style Chevy heads are over 35 years old now, and some much older! Basic Small-Block Chevy Head Porting. Plus they have hardened valve seats- something your heads needs if they haven't been installed already. the engine is a 350 Steel crank, 4 bolt main, 9. Chevy's own statement is that the L31's are the best flowing iron head ever built. Does anyone know what the port sizes are on these heads,I remember reading that the X heads had a larger port volume and therefore were a better starting point for a performance upgrade. Jan 21, 2004 · The 882 head is the most produced chevy cylinder head over and above all other casting numbers. 4:1 with 64cc heads that I planned on using. 200-0. The flow numbers stock vs stock are obviously night Apr 28, 2005 · You will gain a TON of power between those two heads. 500" as a 151cc smog head. The 882 heads were installed on the 350 ci and 400 ci engines (400 heads had steam holes). with a very mild cam, that little booger ran like stink! the cam was 216 dur @ . So i changed the cam to dur@50 230/230 valve lift . May 9, 2008 · 487x heads flow the best out of all the big chamber medium valve heads (1. As far as running it on pump gas,I would say no. these were heavy duty replacement engines with heavy cast heads that flow better and cool better than most other post emission head. These heads also have 1. Mar 22, 2020 · The heads are casting 882. 6L - 400ci - V8 engine. These were stock for 882 castings on L48s in '74, don't know about '75. Jun 7, 2006 · The 882's have significant port obstructions in both the intake (guide boss, and short side radius) and exhaust ports (guide boss, short side radius, and roof area). They work very well also. Whether it's a lightweight head or not, any used head should be checked for cracks, especially in the exhaust seats. 600 lift so the 882 heads that generally flow about 206 cfm are not all that impressive, will they work on a daily driver? sure but ID look for something better if performance Nov 3, 2018 · The L82 came with 882 cast iron heads with OEM screw in rocker studs and guide plates. 480/. Both are good performance heads. the 993s are an excellent post emission head. it makes little sense to choose a head with great flow numbers Feb 13, 2017 · 14096217 Iron heads, are centerbolt. 940 int 1. 94 1. However, 062 has slightly larger valves than 906 Vortec Heads. Mar 25, 2016 · However if you use a mild flat tappet cam the cheaper 882 heads can be rebuilt with a 3-angle valve cut for good flow at 0. 305 cc 186 heads was a premium fuel engine. maybe partly due to higher comp ratio? i ran a set of 492"s (Z28/LT1 castings) , on a . 292" – 3917292, or 340292. I have built several 350's using Dart's Iron Eagle 180cc head with 64cc chambers and 2. May 5, 2012 · I remember chuckling about the fact that the 882 flowed pretty much the worst of all of them, but people still bragged about having "882 Corvette heads. The 1996 - 2002 Vortec heads are like EFI LT1-LT4 heads, but designed to bolt to Gen. . 94 I and 1. Naturally, the 882 heads received a suitable valvespring package to work with the May 4, 2022 · Purpose: Head casting symbols help you identify the manufacturer’s part number, production date, and specifications of the engine head. 94" and 1. Note: stock vortec heads flow 228cfm in and 153ex have flow tested more than 1 set. 1 59 57. 94 valves and the 76cc chambers. Applying what is detailed in the next dozen pages on heads will allow you to generate more airflow and, consequently, more power. If you’re a stranger to these block engines, read my summary on 400 and 350 small blocks. 4L and building a 78 Nova Jun 27, 2023 · 993 Chevy Heads And Chevy 882 Head Specs Comparison. 76cc 1. This is just for a driver, nothing fancy, so the whole Vortec/aftermarket head comparison doesn't really apply here. better flow, better chambers, after modifying the springs you can run a higher lift cam. The exhaust was very impressive creating an E/I ratio of 72%. 500" Intake / Exhaust. Valves are 1. 50 valves, 64cc nominal chamber with projected spark plug placement (for faster burn), and they might have a thicker deck. I have never flowed the 305 head either, but lets guess it's under 200 cfm, which is pretty safe I think. '09. Mar 7, 2017 · a good average aftermarket performance head should flow about 250 cfm at . 5 76cc heads, except at . The 1947 - Present 882 heads Web . 050" 1-38. Lastly I have a set of 305 HO 601 heads with 1. Vortec heads (or 461X camel hump heads) would be worth another 15-20 hp on a street engine. Dec 11, 2007 · The el problemo is that 882s are obsolete by any standard. This was due to the double heat riser passage. Mar 27, 2003 · I have read several articles recently where folks are talking about 882 heads as if they were really the cream of the crop. 400" Intake / Exhaust. 6" valves and also machined for screw-in rocker studs and pushrod guideplates. These heads with a flat top piston will come in around 9. Oct 8, 2008 · C3 Tech/Performance - GM 4586642 cylinder head info needed - I am seeking technical information for GM iron cylinder heads, casting number 458642. (Most high perf. Jan 20, 2005 · these had the small valves. It also is a 64 cc combustion chamber. With the 882 heads it got 16 and ran 85 in the quarter, both before and after replacement. 9, E-20. Dec 11, 2011 · My wifes 77 L-82 vette had them. Ideally, you should flow this head first on both the intake and exhaust sides to give us a good solid starting point, but for many enthusiasts that may not be practical. They are 1987+ (and later) and feature 72 degree center bolts. These heads will interchange with casting number 487, 487X, 993, 882, 624, 441 and many others. the 882 heads were installed on the 350ci and 400ci engines (400 heads had steam holes). 1. Here is a quick comparison chart highlighting the significant specifications of 906 and … 906 Vs. Perhaps even more importantly, the mid-lift flow numbers on the closing side are important since this is when the piston is on its way back up toward Top Dead Center (TDC) and pressure is rising in the cylinder. But, they did flow good from the factory, even with 1. Cam is a small solid cam 224/224 @ . Assuming a fresh valve job and general head rebuild, you are probably looking at $200 to put your 882's on the road. Most flow numbers for CANFIELD heads come from their Web Site Jun 11, 2001 · The 882's arent the greatest head but are the better choice of the 2if they arent cracked. Stan Weiss' - Cylinder Head Flow Data at 28 Inches of Water -- DFW / FLW Flow Files for use with Engine Simulation Software Dec 19, 2005 · Like the 193 SP heads, they don't flow as well on the int side but they flow better on the exh. Register or Log In To remove these advertisements. 040 over 327. The only reason I used these heads was because they were Dec 15, 2008 · It's my ride to work and home. that style of chamber gives up about 30 ft lbs. The reason that the earlier iterations of this engine cracked was due to the fact that they ran really hot. 6 heads gained flow. May 9, 2008 · The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board 882 heads Web 67-72chevytrucks. But it will not flow with the Vortec. The second engine is a Jasper rebuilt 1968 283ci with one 3884520 power pack head and one 3814480 ordinary head (lower Mar 14, 2007 · The 882 head is a 75-later head-----NOT GOOD. 50" valves, 64CC combustion chambers, straight plug configuration, not sure on the accessory holes, and I do not have any port volume data on these heads. The 882s are quite similar to 84-86E 462624 heads. There is more to a cylinder head than just intake and exhaust port flow, but for small-block heads, flow numbers are a great indicator of performance potential. 94 or 2. 73 gear set Feb 15, 2008 · The heads I have would probably sell for a fair amount on Evilbay, that may still be an option to fund the aftermarket head purchase. What are the 882 flow numbers Jan 13, 2009 · I like my 882's. 50. I have 882 heads, ported, milled, 2. The 882 was #5 of the five castings tested, and casting 041 was the best. Many times the nicer HP 882 heads can be picked up cheap as people don't realize which version they have. Ranging between 300-/350hp/ 330-370tq. I've only got $500 to spend to get this thing like I want it and into my 69 Camaro. All flow numbers for Bullet Cylinder Heads come from their Web Site updated Dec. 900" Intake / Exhaust 1. The goal is to build a fun street engine. Re: Pocket porting and flow numbers for 041 heads 05-05-02 02:59 AM - Post# 104418 In response to Leadfoot68 For aftermarket heads I'd recommend getting good heads like Canfields ~1000$ or AFRs ~1200$ instead of WP heads. It looks like that first set had some whoppin' valves but as noted by BurnoutNova there probably wasn't a lot of gain there. 2001 Feb 22, 2018 · Here is an excellent place to look up your casting numbers : Chevy Casting Number identification - Block casting numbers casting number heads 186, 041, 624, 882 Feb 3, 2015 · The 1969 350/255 with it's 9. My guess is that the camel hump heads are probably good for 15-20 hp on a street engine just from the compression ratio increase. port and polish as mush as you can afford, unshroud the valves use 2. "Cylinder Heads To Go" accepted used cores and their heads have valves, springs, etc. com May 9, 2008 · The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board 882 heads Web Oct 24, 2008 · Rizzle wrote:I highly doubt any 882 head will keep up with anything gm called a vortec head. A good indicator for power potential from a cylinder head is to use a flow bench. 4 192 196. They were produced in the millions and if you are rebuilding a 70's era 350, more than likely it will have a set of these heads on it. Bascially here are my options. If you want a big port head, start with a big port head. A lot depends on the cam & the point @ which it closes the intake valve which will determine your DCR,or,actual compression ratio. Engine is going into a rat rod 46 Chevy so it’s just something to have fun with. May 12, 2010 · Look at your low lift numbers that have been posted, the vortec stock numbers will go close to 240 cfm at . Nov 3, 2006 · The 882 head is a 151 cc intake runner, so basically they are comparing a World products head to a small port smog head from the 70s. With the 487 head it got 18 mpg and ran right at 100 in the quarter. Don't bother spending any money on them. Ten years ago the 882 heads looked good with a flat tappet cam but today roller cams and aluminum heads allow much better flow at higher cost than rebuilding 882 heads. My machinest opened up the chambers to 64cc and port matched the intake to them. The 882 heads had double heat-riser passage and were prone to cracking because they ran so hot. 2:1 with these heads and 10. 02, 1. Can't complain on the performance result. And he didn't mention 487 heads, which are "pretty good" heads for a 76 cc head, though many are cracked. Just sold an extra set of the good 2. *1 -- These flow numbers come from Chevy High Performance Magazine Data. Feb 20, 2015 · Here is a helpful link to answer cylinder head question. I`m going to see if the machine shop can shave them down to 70-72cc`s. 33 cc 441 heads was a regular fuel engine. 480 lift with 230/230 Duration at 0. If both heads are 1. I'm not going to be running the strip at 7 grand. I usually use 441, 487, or 487X those 3 are getting harder to find every year. 02 /882 cast heads . they came standard on the target master engines. 3 166 125. I used a 2. If you are truly worried about flow, go to a vortech head. Do not believe the info from the internet Cylinder head flow data base that says these heads flow 206cfm . Aug 15, 2006 · I just bought a rebuilt 350 with a mild cam, 882 heads and a cast iron intake manifold for $1,000. I just thought it was odd that I can't find flow numbers anywhere on certain GM head castings after I really started digging for info. Rectangle-port Rat heads are a classic example of a too-large port. Nov 14, 2016 · I was selling a lot of 781's for a while and with 2. 50" valve sizes. 2 141 / 109 Apr 1, 2009 · Over the years, the SB Chevy V8 evolved and grew in displacement from 265 to 283 to 302 to 327 to 350 to finally 400 cubic inches. 19/188 valves (11/32 stem, no back cut on intake), good valve job and no blending or porting they would flow very similar numbers; In / ex . The head is the same as L98 Iron head 14011083 which is why these heads were found on this car. I don't know how much you may be familiar with SB heads, BUUUUUUUUUUUT, 74 was the LAST year for "good" production SB heads. Or do these heads stop flowing around 420 lift? Apr 25, 2009 · This is a very low buck head setup. I know these heads aren't complete junk like 882's. 500 lift, Not saying a 416 head could not do that, but most don't have access to a flow bench or even willing to spend the 10-20 hours it will take to get 240cfm from a 416 head. Furtherore, I am leaning towards on older pair of used 882 heads, w/ no work done to them. 5 with 64cc combustion chambers. The 882's are from the smog era, so the chamber size is large 76cc vs. I am looking for intake/exhaust runner sizes and flow. Crafted to exceed OEM specifications, these cylinder heads are designed to be the perfect fit for your 6. Oct 16, 2014 · And I'm not sure that a 993 head is much better than an 882. The combustion chamber shape (D-shape) of these "smog" heads is poor for combustion efficiency and these heads will always make 20-30 less HP than a "small Oct 23, 2021 · What are 882 Chevy Heads. *4 -- These flow numbers come from Edelbrock *5 -- These flow numbers come from Car Craft - Jan 2001 *6 -- From Paul Shufelt *7 -- From Chevy High Performance Feb. 60 Valves and good valve job, mill heads to 75cc for less than the price of a set of aftermarket heads (according to the Sep 3, 2004 · according to a book i have on chevy small blocks they say the 441 is a very good head, good casting, and was basically the first step away from a high performance head with the increased chamber size (decreased compression). 5:1 compression ratio with these heads, comp cams . Aug 17, 2001 · You should have 882 heads. Jun 7, 2004 · The 993 heads were used in 72-73 Chevy 350s, many of them were the 250 horsepower version. It isn’t hard to notice 882 heads are 400ci small blocks with a pretty consistent 200 CFM rating in a sports car. Choptop, im not sure about all the flow #, but feel that there was more power in the old "fuelie" heads. '12. But,from the Chevy mania website that has sbc serial numbers, they say these heads are extremely crack prone. Aug 29, 2001 · In reading an old Chevy High Performance magazine, the 882 head is listed as the head with the smallest intake port size (and lowest flow numbers): Category 1 - Port Size under 180cc: GM 882 - 151 cc Nov 10, 2008 · Al Covin 's book CHEVY BY THE NUMBERS notes/verifies this oddity of the 881 & 882 Castings being excactly the same late in the 1974 year . 5 196 141. He wants $200 for them. Best I can find is a fairly consistent >200cfm rating in the garage is a well used 350 wearing some heads with casting 993. 60 stainless steel valves w/. Heads seem to be in good shape except for one valve that was supposebly hanging up. I have read some flow numbers on the internet regarding the 882's, and I have a hard time believing some of the flow numbers people are posting on these particular castings. Oct 13, 2006 · I have a set of Chevy heads with a casting number of 333882, with 1. All the research I did on the X head said it was the same with a bigger intake port and 2. 60 valves reground and a set of valve springs that match your cam. Jul 12, 2009 · I am not a cylinder head guru, but the flow numbers show that the 882's are quite comparable to the Double humps. Mar 18, 2021 · SBC 882 heads with 76cc chambers (likely rebuilt heads) new roller rockers and pushrods Test run once and then stored in a dry trailer X 8+ years during which water/coolant got into several cylinders causing heavy rust. You obviously tested the heads at a much lower test pressure drop than 28`. 500 lift springs and 3/8" studs and guide plates seems cheep about 320. 50 E valves: the casting number was 333882. Mortec decodes them as 71 to 72. The following information on porting deals with 23-degree Chevy heads pretty much across the board. 050” on a 108 LSA that I used to run in a 327. Also 67 block has forged crank and flat top forged pistons. Feb 24, 2007 · The ported large valve 305 head route is cheaper by far. I know the 993 casting is ok but they are pretty crack prone in my experience. They might be stamped or cast into the metal, often on the top or side of the head. Apr 25, 2009 · 993 Head Casting Flow Numbers Engine & Drivetrain. It was necessary to upgrade the spring package on the stock 882 heads to accept our 262 hydraulic Apr 3, 2002 · For reference I did look on the internet for heads and found a number of places that sell remanufactured heads ready to go. 600" Intake / Exhaust. Aftermarket blocks and stroker cranks have allowed even more displacement, with some “small blocks” now having as many cubic inches as a big block Chevy (427 and 454 Those ported 882's must have 0. HOW TO VIDEO: The truth about cylinder heads and flow numbers! In this video, Brian Tooley Racing goes over why bigger isn't always better when it comes to Jan 1, 2007 · Equipped with the stock 882 heads, the mild small block produced 337 hp and 352 lbs-ft of torque. 94"/1. They may have been used on the 307 also. Especially the engine's overall torque output. The specs are @5500rpm 390hp/ 4500rpm 412tq. My machinest said they would make my engine react like a set of vortec's would. Nov 25, 2001 · The actual CFM flow numbers would depend on if any work was done to the heads, and the quality of the valve job I did read one test on flow #'s for a 461 (stock, untouched), the #'s were as follows: . 200" Intake / Exhaust. These heads will also interchange with double hump heads with casting numbers 370, 461, 461X, 462, 291, 292, 186, 041, & 492. I just find it hard to believe you can PAY for that quality of porting, convert heads to screw in studs, guide plates, 2. 5" lift, where it stalls thereafter). 6 199 141 They get 10% more flow with minor port cleanup work, and ~20% more flow with a little more port work. They don't make any power. 3 to 1 compression. These numbers would go up if you had a bigger cam or turned more rpm. 461 vs. 028 head gasket for a . Keep 882 heads (already have crane springs), add an aluminum intake manifold ($140), 8" harmonic balancer ($60), new gasket set Re: wht are the flow and cc on 487X heads? 12-09-04 05:56 PM - Post# 569498 In response to Rick_L Rick; The '70 370HP LT1 used 414 64cc chamber head (high CR) and the 492 64cc head. 60 valves and port work. i did this Dec 11, 2004 · Head Casting vs Flow Chart SBC Engine & Drivetrain. 050, & mid . With the part number ALL-20201, sourcing these high-quality Jun 2, 2011 · Fine heads to use on their original block although the later iron LT1 heads being a newer design, actually flow better and make more power then the earlier aluminum ones and the even newer LT4 aluminum heads flow better yet . Jan 6, 2003 · I wanted to get 400+ hp/torque. Jan 5, 2014 · The "Chevrolet Small-Block V-8 Interchange manual" by David Lewis states as follows: a lighter cast head was released sporting 1. While 906 and 062 Vortec Heads share some similarities, there are also some notable differences. Jul 3, 2003 · heeelp meeee search my post for heeelp mee and i talk about my 400 and my tale of woe. I'm not a big fan of World heads. the crank was shot too as the trust plate was gone Jul 4, 2008 · They are an excellent replacement head for the mid-late 70's thinner castings like the 882. I wouldn't plan anything around using them except for a numbers matching restoration. I have a comparison from Chevy High Performance from a couple years ago, and these heads actually flow pretty well for a mild cam (like Comp 268 or less) When I rebuilt the L48 in my '74 I had the 882 punched out for 2. Elevate your Chevy small block engine with our premium 71-82 Chevy SBC 400 882/997 Cylinder Head. They are casting number 14011034, does anyone have experience with this head on a street car? Jul 7, 2009 · Sb chevy 882 head flow question Post by drifter » Tue Jul 07, 2009 2:24 am On a set of 882 heads with stock size 1. 02. Although I know these heads are considered basic smog heads that don´t flow too well and feature 72cc combustion chambers I wan´t to stick with them for budged reasons. they will work fine for now but they wont make the power Re: #882 heads 08-24-02 03:45 AM - Post# 121183 In response to It is possible to get the 350 HP with the 882 casting, but with a better head you will be able to do it with a smaller cam and have a broader power band. 3 to 8. I am looking for an inexpenisve iron head to replace them with. But I still don't like the limited number of intake options. Actually the 441 heads is one of the best heads made for the 350. 94 valves. If you look at the intake and exhaust flow numbers, the head is on a par with a production head. 2 square inches of area (or larger), flow velocity is virtually snail-like and volumetric efficiency (VE) suffers. 062 Vortec Heads: A Head-To-Head Mar 12, 2009 · I have heard, and seen some flow numbers around somewhere that indicate the ZZ4 crate engine aluminum heads are not the same as the original corvette 113 castings. are ready to bolt on (no endorsement implied here). As already referred to, they are highly prone to cracking in critical places, and do not take kindly to port work as a result; their combustion chambers are a cavernous 76cc, and leave you with a compression ratio way short of anything resembling performance; and their flow. Beginning in 75, Chevy started cutting corners on the SB heads, and by 77 they were basically junk. the same book says that if you buy an engine that has 882 heads they should be discarded. I also have a brand new set of Chevy bowtie heads, I think they would be too much for this engine. 94 Heads, i am hoping to make 350-375HP with them. Sep 4, 2008 · Brzezinski published stock flow numbers for the 492 head that they report is is very similar in flow to the 487's: Lift In Ex. 94 and 1. 5:1 or below for pump gas & iron heads. 030 over Speed Pro 4 valve hypers and the block has been decked to . Location: Typically, you’ll find these casting numbers on the cylinder head itself. Let’s start with a typical iron production head like an 882, 441, or 920 casting number piece. May 30, 2006 · Not knowing the exact specs on your 383 its hard to be accurate but most 383s with flat top pistons will be around 10. The 041 is a heavy cast head with 64cc. You just have to calculate the amount to make them usable. 94 valves and unported probable only 20 to 30 hp difference. The heads came with my Five Star 383/360 HP crate engine. 400 flow equivelent to Vortecs for those kind of numbers. I did the math on Pat Kelleys calculator and I came up with 9. 500 lift. I did not measure swirl when flow testing. These heads are very similar to the 441 and 493 400 small block head. Most flow numbers for BRODIX heads come from their '98/'04/'06/'08 Catalogs. 5 ratio roller The port flow numbers are roughly equivalent to a decent set of older iron heads like the 882 or 441 heads. Don't know the flow numbers. This should place more emphasis on the cylinder head’s mid-range valve lift flow numbers. It's not obvious that the stock 081 heads are better than the 187 LO3 heads due to the flow imbalance -- you can't fully use the int if the exh can't flush the cylinder. From what I was able to dig up, they are smog heads, but if you "need" to run smog heads, these flow fairly wellcompared to other smog heads. May 3, 2003 · the 450 castings were used on 262 267 and 305 engines, they have real small ports, valves and chambers, while they would shoot your compression way up there, the extra compression isn`t gonna make up for the loss of flow rate compared to the 882 casting, if you want to kick up compression with the 882`s, I`d suggest getting them milled about . Aug 25, 2004 · The idea behind this effort was to use one flow bench to test as many small-block and big-block Chevy cylinder heads as possible. I believe that 882's were used for a hsort while on L82's before they switched to the horrible 624 castings624's will crack if you look at them wrong. The flow numbers on 882s are not much less than small valve hump heads. The lower CR '71&'72 used the 487 & 487X 76cc head depending on the horsepower output, I was told you can use dome pistons with the big valve 487 to bring up the CR. Cam and intake will have a major impact on the end result. Compared to aftermarket heads, or vortecs, or even 60's/70's GM performance heads, they're awful. 02 and a good valve job. The best price I got on '993's was $130/ea. That's not to say that the LO3 heads are better. 02" valve. 05" valve and a port wall thickness left that will hold up in use will net you some 265 Intake cfm@28" way up at . and they are cheap compare to other aftermarket heads. The Eagles flow what 260 cfm. Info from Chevrolet specifications and backed up by Alan Colvin's Chevrolet by the Numbers 1965-69 and 1970-75 editions. It was available from the factor with both 1. *3 -- These flow numbers come from misc. They usually only gave a 9:1 compression on a Chevy 350 with flat top pistons. Note that with the 186 heads producing intake flow numbers over 265 takes you to the tiping point where you will start to drop off some of the lower lift flow range numbers, but the added port area and volume will help the motor hang on to its peak HP higher in Feb 19, 2004 · This head offers the highest average intake port flow and the highest peak flow numbers. 500 valve lift, also flowed an AFR Enforcer and got 253 cfm at . 50" valves. 500 ex. They are beefy for porting, but they flow almost identically below . I have used three sets of 882 heads and from my experience you are better off putting money into Vortecs or a good Dart, TRickflow, Edelbrock and so on. That should flow more than your 283 can ingest. On the plus side, the aluminum Corvette head offers a slightly better exhaust port than the older iron heads which helps produce slightly better peak horsepower numbers compared to iron production heads. They are more preferred over the 882 head due to their heavier casting. The extra head flow allowed our small-block to take full advantage of the extra lift offered by the Crane cam. com May 9, 2008 · 882 heads The 1967 - 1972 Chevrolet & GMC Pickups Message Board. 60 stainless valves. The 882's and 993's are 76cc. Nearly identical size ports If the 487's you are looking at are really from a Corvette, they will have 2. Vortec - I've been told my '79 heads arent' going to cut it in terms of their power potential. The Chevy 882's didn't have good compression, because they had larger combustion chambers. Dec 5, 2009 · Do yourself a favor and sell those '882' heads to someone else and buy a set of aftermarket heads ready to bolt on that will make the power that you are looking for. 60 valves and then I heard people say they had the X head and they were 1. yes they are made in mexico. Stan Weiss' - Cylinder Head Flow Data at 28 Inches of Water -- DFW / FLW Flow Files for use with Engine Simulation Software Not trying to stir anything up. Newer heads flow waaaaaayyyyy better. 94 intakes. 50) these are highly sought after and would give you a small performance boost over your 624 or 882 heads. Chevelle V8 Cylinder Head Casting Numbers - 1964 through 1972. Re: Are 882 heads really that bad? 06-04-03 07:42 AM - Post# 241739 In response to most people dont realize that the biggest disadvantage to these smog heads besides the cracking problem is not the flow numbers, its the combustion chamber shape. Turns out the mystery SBC EQ (Engine quest) heads flow quite well as cast! 600 HP Potential!Some Flow bench results comparing them to Vortecs and Iron eagles Dec 31, 2009 · These are the identical heads used on the '72 Chevelle's with the LS-5 option and incorporate the "unshrouded" exhaust valve area of the chambers! Stated above, similar head with the casting number 3999241 is used on the '72 LS-5 Chevelle units and the info here is the same. Apr 1, 1999 · GM 882 IronThe smallest of the GM heads we tested at only 151 cc, the 882, turned out to be the best-flowing of the early iron heads. 6 stainless steel valves with bronze valve guides and dont scrimp on the valve guide seals its worth the extra 15 bux. sbveo aihue yozsa rbfltk lcpmbd izjymgyyd bitidaw aiafkh mapv uvzpgpgz