Chevy 882 heads hp specs. That is the benefit of aftermarket heads.
Chevy 882 heads hp specs Dec 9, 2009 · I currently have 882 smog heads on the engine. the 882 (common SBC smog era castings) heads featured both small valves (1. 454) to have 8. 450/0. 465 int. 1 2 3. 500 lift springs and 3/8" studs and guide plates seems cheep about 320. If you are going to use a mild flat tappet cam the 882 heads are pretty good up to . 100" Intake / These heads will interchange with casting number 487, 487X, 993, 882, 624, 441 and many others. Legal Streeter - 1956 Chevy Bel-Air 7. 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). I assume that the 882 refers to the serial number 333882. This engine with this cam ran great and had lots of power at every RPM point from idle to 6000 RPM. 020 over and decked with flat top pistons. the guy in the machine shop sold me a set of 333882 /J 83 heads with new valves he said they were good heads with hardend seats. 08 gears. 030" overbore with the 882 heads shaved to 73 cc chambers along with a three-angle valve job. Cylinder Head Flow Data At 28" H2O Chevy Manufacturer /Part Number Port/Vol Intake / Exhaust Valve Size Intake / Exhaust Combust. 50 only. 425 to 0. 5:1 CR, except for the 210 HP 350 which had 9:1 CR. Whether it's a lightweight head or not, any used head should be checked for cracks, especially in the exhaust seats. 470 lift, 224 duration, full length headers, running a performer intake which id still run for the vortec style heads, customized 650 double pumper. Apr 16, 2013 · The only ones I ever saw were angle plug - the 492 head was available in straight or angle plug. 50 E valves: the casting number was 333882. 94 and 1. 50 or 2. The reason that the earlier iterations of this engine cracked was due to the fact that they ran really hot. Jan 14, 2019 · "Loyal readers will remember that the low-compression L82 was equipped with 882 heads, L46 hydraulic cam (0. 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. The 993's have a much straighter shot to the intake valves than the 882's and the intakes are considerably larger appearing. bore and stroke with . Applying what is detailed in the next dozen pages on heads will allow you to generate more airflow and, consequently, more power. Sep 16, 2011 · The heads were limited to the Corvette, although an iron casting was standard on the IROC-Z and Z/28 Camaro, Trans Am, and Corvette starting in 1985. May 1, 2023 · A quick test of eight pairs of small block Chevy heads priced at less than $1,000 to find the best small block Chevy heads on a budget. Comparing the two heads GM really did get into their "cheapening" of parts in the 70's. Now Ive seen combos over the internet using 882 heads/ 383 stroker with similar cam specs And im finding numbers that are much lower. 94 Heads, i am hoping to make 350-375HP with them. 76 cc combustion chambers. He did some at home porting, he said that he ported out the valve runners, or whatever you want to call them, so they don't get really small right after the valve, the bowl area, the acual intake ports and where the valve guides are. On the plus side, the aluminum Corvette head offers a slightly better exhaust port than the older iron 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. The following information on porting deals with 23-degree Chevy heads pretty much across the board. 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. -----375hp 78 Chevy truck 77 Chevy Nova 95 Chevy Lumina 3. 459/. Info from Chevrolet specifications and backed up by Alan Colvin's Chevrolet by the Numbers 1965-69 and 1970-75 editions. Jan 20, 2005 · The ones I have have longer narrow holes which is why the intakes are better than the 882. the engine is a 350 Steel crank, 4 bolt main, 9. Cam Specs. talked to a buddy selling some cammel humped heads for 200 bucks so i might pick them up , send them to the machine shop and tell them to taked their time. It isn’t hard to notice 882 heads are 400ci small blocks with a pretty consistent 200 CFM rating in a sports car. 400 inches on. Beginning in 75, Chevy started cutting corners on the SB heads, and by 77 they were basically junk. I am not concerned about highest possible HP at WOT, I just want a descent torque in the range 2000 thru 4000 rpm. 50) and large 76cc combustion chambers. 23 @ 196+ @ 3800# Aug 8, 2009 · My '76 Chevrolet advanced info shop manual shows the 110 HP 262 cid, 140 HP 305 and all 350's as having 8. Jun 24, 2011 · 882s Heads any good? Jump to Latest 41 - 44 of 44 Posts. I would love to use an aftermarket set of heads, but at this time the funds are just not there to warrant a changeover. Oct 18, 2012 · i have a 1989 chevy blazer with 7" lift on 38x15x15 wheels with 700r4 with 373 rear swap. 882 heads. These numbers would go up if you had a bigger cam or turned more rpm. 5 ratio roller Aug 15, 2006 · 1. Description: 71-82 Chevy SBC 400 882/997 Cylinder Head. 50) these are highly sought after and would give you a small performance boost over your 624 or 882 heads. 20 or lil lower, these heads have 1. These heads will also interchange with double hump heads with casting numbers 370, 461, 461X, 462, 291, 292, 186, 041, & 492. 5 to 1 with a 64cc head. The only difference was the '69 heads were machined for 13/16 hex, gasketed spark plugs. If you are just looking for a set of inexpensive aluminum heads to use on a street cruiser, the L-98 Corvette heads perform decently. Oct 13, 2006 · I have a set of Chevy heads with a casting number of 333882, with 1. Would getting these heads give me some better flow, is the chamber too big for flat tops? Feb 11, 2012 · Hi fellas, I decided to post my first thread after spending some time online digging for info and not finding what I need. Sep 18, 2017 · The 882 and the 487 have very similar flow figures when in stock form using the stock 1. Username Post: 881 heads? good as 882s? (Topic#60580) davidh Senior Member Posts: 562 Loc: Oklahoma Reg: 02-17-01 Oct 13, 2006 · In Part II of Chevys Gone Wild, we try to get 550 HP out of our Chevy small-block 350 test mule with bolt-on performance parts. 400 lifts. I'M ONLY REFERRING TO PRODUCTION HEADS, NOT CHEVY'S OVER THE COUNTER PERFORMANCE HEADS, SUCH AS BOWTIE HEADS! Feb 13, 2017 · The head is the same as L98 Iron head 14011083 which is why these heads were found on this car. Aug 25, 2010 · I use 882 heads to 10. Oct 8, 2008 · The 882 is, as I can judge, is one of the better smog heads and will serve my purpose. 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. Feb 24, 2007 · Ive read the Lingerfelter book where he stated the 993 heads flow better then the 882s I read the Vizard book on head porting he supplied actual flow data on the stock 993s using Vizard numbers with my pump gas combo the best HP I get through dd dyno is 335, I believe the Car Craft data is flawed or they tested a really good stock 882 head. Or you can build the same thing as a 383 (I did) and scare the crap out of your passengers. I`m just going to do some bowl work,narrow the guide bosses and gasket match them. that style of chamber gives up about 30 ft lbs. My set was originally on a early 1990s 300hp/350 GMPP crate the one that pre-dated the 330hp HO. 50" Exhaust, or 2. 1970 engines used 5/8 hex "peanut" plugs. Jul 10, 2008 · About the only thing 882's are wanted for anymore are stock head racing classes- and then only when you can't find or afford to get a set of 487's or 487x's. 480 lift with 230/230 Duration at 0. Mar 8, 2007 · years ago i ran these 882's in high school and they worked good after a full comp port/polish, port match and 3 angle polished valves, they were good for 330hp , good enough to beat many 5. Thats to much for a mild cam and pump gas. And he didn't mention 487 heads, which are "pretty good" heads for a 76 cc head, though many are cracked. Aug 14, 2005 · The 882 head is the most produced chevy cylinder head over and above all other casting numbers. Let's say that your ported Edelbrock CJ heads, and Blakes ported TFS Street heads, flow the same flow numbers, (or nearly the same flow numbers), at all lift points from . Basic Small-Block Chevy Head Porting. 94" Intake/1. The 882s are quite similar to 84-86E 462624 heads. They also have a new spring setup from Comp thats able to handle up to 500 cam. Among the best stock heads of all time until Vortecs. 94" intake and 1. Dec 22, 2018 · Gm bolted these to a truck block in 1996 and the increase hp by 50hp pver previous heads. I did manage to run in the 12's with a set of 882's on a 383 but, I had a lot of time and wasted money into them. 88:1 compression. 60") Feb 27, 2003 · So what you get for about $350 more than the 882 comparison is a motor that Chevy High Performance dynoed to 425 hp as a 355. 94I and 1. 00 for the set ready to bolt on. but the cost of the new vortec style intake could bust the budget, and the the rocker arms need to self aligning style Mar 18, 2003 · 882 heads get a bad rap, and for some reasons rightfully so, they actually flow pretty well for what is otherwise considered a smog head. These heads like low lift cams 0. Apr 5, 2012 · C3 Tech/Performance - Summit K1104 cam too much for 882 heads? - Is the Summit K1104 cam too much for 882 heads? K1104 Basic Operating RPM Range: 2,000-5,600 Duration at 050 inch Lift: 224 int. If you want to only make 300hp, these heads will do it with some flat top pistons. Another note: The 291 heads also came on late '69 L78 engines. 02" Intake/1. Aug 15, 2012 · I know the 882(1. 5 is getting to the top of there limits and will flow about 250 cfm intake side in stock form and capable of 450hp in stock form. 480 with a 750 cfm and single plane. I was told they had 5000 miles on the Sep 12, 2023 · The L31 cylinder head for Chevrolet’s latest 350ci Vortec truck engine just might be the best small-block Chevy production head ever built. 60 valves and made about 465 hp out of a 355 with them. 50 the exhaust ports are 15/8's" round, it takes 13/4" headers to seal them off, the intakes are about 1. Nov 7, 2019 · These heads have 2. 60 valves vasco 1. Dec 31, 2011 · So if I'm correct on that, then a 50 HP gain would only be obtained over and above a small block engine combo which had heads that are waaaay too small for the camshaft being used, and as a result, the engine was very much over-cammed with the old heads even after the work was done on the 882's. Feb 3, 2015 · The 1969 350/255 with it's 9. its got 4 valve relief flat tops, comp 270 cam . These heads are very similar to the 441 and 493 400 small block head. however flow flattens out from . Chamber Volume. Feb 8, 2009 · If I am not mistaken, these are the same heads that came on the LM-1 and it was factory rated @ 255 HP. Common casting numbers are #461, #462 and #291. Cam is a small solid cam 224/224 @ . The revised 461 heads were available starting in 1964 models with either 1. 6 is the best 1/8 run 456 crank hp is Wat my heads can support according to a Flowbench! Dec 31, 2008 · C3 Tech/Performance - L82 head specs? - What exactly are the specs of an L82 head? I've tried to research with no luck. May 19, 2019 · 062 vortec heads The 1967 - 1972 Chevrolet & GMC i,ve decided to go with my modded 882 heads, big stainless necked down stem valves, screw in studs, opened up Mar 14, 2007 · The 882 head is a 75-later head-----NOT GOOD. 94 intake valves, sometimes Jan 6, 2003 · I wanted to get 400+ hp/torque. Equipped with the stock cast-iron 882 heads, the 355 produced 337 hp at 6000 rpm and 352 lbs-ft of torque at 4000 rpm. I am using a '76 Corvette engine with . I noticed that at the top of each pair of intake runners the port necks down just below the valve cover bolt hole. GM DID offer the 400/TH350 in ALOT of G10 and G20 Vans and chances are it may already be bolted to a TH350. 94 valves and unported probable only 20 to 30 hp difference. The 882 was #5 of the five castings tested, and casting 041 was the best. The 1974 882 were the heavy duty casting , same as the 881 , Just had them rebuilt from the machine shop , confirmed by the shop that rebuilt them they were the the HD castings. 5:1 compression ratio with these heads, comp cams . I don't know how much you may be familiar with SB heads, BUUUUUUUUUUUT, 74 was the LAST year for "good" production SB heads. But I used them with a good piston to build compression and 2. Dec 29, 2011 · Re: chevy 882 heads « Reply #1 on: December 29, 2011, 10:01:37 PM » they are a low compression pickup truck head, generally, that have decent sized runners and usually at least 1. Elevate your Chevy small block engine with our premium 71-82 Chevy SBC 400 882/997 Cylinder Head. The specs are @5500rpm 390hp/ 4500rpm 412tq. This is a mid-to-late-1970s 197 small-block head that was fit with 1. But,from the Chevy mania website that has sbc serial numbers, they say these heads are extremely crack prone. L48 333882 heads had the smaller intake valves, no guideplates. But just a moment, you’re a beginner and you don’t have a flow bench. 60 valves. I once built a 400 with the stock 882 heads, Edlebrock Performer RPM intake, Holley 3310 carb, HEI ignition and Hedman headers. Plus the combustion chamber design will allow more compression. 50" exhaust valve. The Bad News; these heads are crack prone!:roll: Aug 8, 2009 · My '76 Chevrolet advanced info shop manual shows the 110 HP 262 cid, 140 HP 305 and all 350's as having 8. I agree with Bill if they need any work or $$$ to make them work I would buy a different set of heads. Oct 23, 2021 · 882 heads were designed by Chevy to be used in 350 ci and 400 ci engines. Apr 3, 2002 · Machine shop suggested a "functional replacement head" would be the 333882's which were used on Corvette's 74-77 (Lo-Po and Hi-Po models) and according to one of those "interchange manuals" a lot of other Chevy V-8s. Description Professionally rebuilt pair of Small Block Chevrolet cylinder heads. Jun 27, 2023 · 993 Chevy Heads And Chevy 882 Head Specs Comparison. 010" reground crank and 0. 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 . Flow will be close to the same. If your existing heads are in good shape and your not looking for ultimate top-end horsepower then I would say go right on and use them. 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. 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. I am looking for cylinder heads, which give me highest possible flow speed, with less than 190cc intake runners, at 0. So i changed the cam to dur@50 230/230 valve lift . Does anyone know the size of the intake and exhaust runners? Oct 10, 2004 · just talked to the local machine shop guru and he said he would have to modify the head due to clearance issues. Many times the nicer HP 882 Apr 30, 2010 · I found a set of reman 333882 heads with 2. 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. May 9, 2008 · 487x heads flow the best out of all the big chamber medium valve heads (1. Heads fit 1986 & OLDER only. I told him that this is the place to get the answers so if you could tell me these head numbers it would really help. 100" through . 2019 Drag-Week Winner - N. and they are cheap compare to other aftermarket heads. 76cc 1. Of course, camel humps have been popular heads since they were new. 73 gears, 12bolt posi, dual electric fans. 050 duration and . Can be ported into the 250cfm intake range, but the chamber shape is not the best for good power, the "fuelie" 64cc chamber or the modern fastburn and heart shaped chambered heads will return 20-30 ft. Find many great new & used options and get the best deals for 350 GM 333882 Chevy Cylinder Heads at the best online prices at eBay! Free shipping for many products! Feb 13, 2020 · Are Chevy 706 Vortec LS V-8 Cylinder Heads Any Good? Dyno testing on an LM7 5. Anyone know what the spark plug reach spec is for this head? I’m thinking about going with a NKG heat range of 5. The factory 302, 327, 350s used 186 heads making 350+ hp back in the day 68-71. Valve Lift with Factory Rocker Arm Ratio: 0. 05-1. 50 E valves. The engine has 882 heads. 6" valves and also machined for screw-in rocker studs and pushrod guideplates. Apr 24, 2010 · hm really, ok then about those 305 heads what size valve is n those, reason why im askn is bc i have so big port 305 heads that we ran on a 355 pushn 13:1 comp with a 230@ . 10:1 compression. Dec 8, 2005 · Good for low-mid 400s HP on modern pump gas, given the CR you have to run these days; which will take a typical steel car to mid 12s if the car is set up well. Also, and I think this is a big deal. 60 heads with screw in studs and come with a combustion chamber ranging from 74-76cc. they will work fine for now but they wont make the power Nov 12, 2012 · Well, there's good news and a little bad news about these heads! The Good News; Chevy used these heads from 1976 to 1987 on 350 cid engines. They came from GM parts, if not a complete crate engine. Here is some historical information about SB Chevy heads that many people do no realize. 02. Maybe latter ones were the thin wall and cracked but not all 882 were the same . (The MSD 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. Jul 30, 2007 · Now then back to your heads. better flow, better chambers, after modifying the springs you can run a higher lift cam. 73 gears, 12bolt posi, d 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. this gives me more time to save some cash for extra goodies, plus us Marines dont make a pile of money,so the more time i have May 7, 2007 · this is what i found on the heads: the 882's were installed on Chevrolet engines from 1974-1980. Anyway the block has been bored . 02 /882 cast heads . Jun 7, 2004 · The 993 heads were used in 72-73 Chevy 350s, many of them were the 250 horsepower version. Dec 15, 2008 · My ral question here is due I rebuild my 14101081 heads or do I go with what I've found out here for $150. 028 thickness The small-block Chevy has enjoyed a long, happy life. I seem to remember 993's were second best. Nov 11, 2007 · The Comp Magnum 280, 230@ . 050 242/254 LSA 116. 50E valves: the casting number was 333882. 50, 600cfm edelbrock carb, Performer RPM intake, headers with Flowmaster 40 series mufflers dumped befor rear end, and 1. 0 mustang gt's! but one did crack months later. Nearly identical size ports If the 487's you are looking at are really from a Corvette, they will have 2. The best factory heads are Vortec's that came on the last 350's, but they take a specific intake and centerbolt valve covers. Jan 10, 2002 · "In 1975, a lighter head was released sporting 1. Crafted to exceed OEM specifications, these cylinder heads are designed to be the perfect fit for your 6. 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 Dec 20, 2003 · L82 333882 heads had 2. C. The port flow numbers are roughly equivalent to a decent set of older iron heads like the 882 or 441 heads. now every web site I go to someone is calling these heads junk. the 882 heads were installed on the 350 ci. 94 I and 1. Dec 31, 2009 · The heads as we set them up will handle better than 600 HP, don't need anything better/higher for the "OEM" guys. The later 461 or 462 heads would be my choice for a nostalgic look and high performance. I weighed a 882 vs sportsman and the sportsman was 8lb heavier. the current heads are 882 heads that have been pocket ported, triple angle valve May 13, 2009 · Spark plug position and chamber looks a little better than the early 64cc heads. If you’re a stranger to these block engines, read my summary on 400 and 350 small blocks. L46 350-HP 350The starting point for the L46 four our test was the '70 LT-1 350 we built for September's story. Jan 3, 2021 · The head with the three accessory bolt holes is a 333882 casting. 73s, hughes 24-2700 converter, headers, and some other little things. I've never seen a 292 head, but thought I read somewhere the sportsman were copied off it or something. 465 exh. The engine part number is 12353641. Plus they will deliver better fuel economy doing it. 6L - 400ci - V8 engine. Vortec heads (or 461X camel hump heads) would be worth another 15-20 hp on a street engine. 480 lift is a great cam in a small block 400. Jan 13, 2009 · There are two different types of 882's - heavy and lightweight. The LT1s in 70-72 on the Z28s had the 041 and 041X heads that were almost identical to the 186s with 350+hp. Best I can find is a fairly consistent >200cfm rating Some combos pick up 50 hp with a Vortec head swap alone Nov 17, 2009 · In this tech article CAR CRAFT continues our sleeper small-block Chevy engine build series with a new intake manifold, cylinder heads, carburetors, and pulleys for 431 HP and 479 LB-FT torque Dec 17, 2018 · The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1960 - 1966 Chevrolet & GMC Pickups Message Board: 283 power pack 520 head flow specs 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. Nov 3, 2018 · The L82 came with 882 cast iron heads with OEM screw in rocker studs and guide plates. They are already set up with 2. Like the Feb 12, 2001 · Here are the specs. Dec 22, 2010 · They are just a basic large chamber smogger head from the 70's, nothing great about them. 800" lift. 60 valves, depending on application. coryz28 · Registered. 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. of torque everywhere in the rev range. 1. First, 1974 was the last year for the "good" thick heads on a factory production SB engine. Sep 1, 2004 · My friend has a pair of sbc heads sitting in his shed that he was wanting to know what kind they are and what they go to. Enough to feel a difference but not enough to buy 100 octane 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 . This head was tested with the 1. 6 valves and screw in studs and guide plates. the 882 heads were installed on the 350ci and 400ci engines (400 heads had steam holes). Keep 882 heads (already have crane springs), add an aluminum intake manifold ($140), 8" harmonic balancer ($60), new gasket set ($40). Using a Holley 750 and a 1" spacer on top of a Victor intake. 00 a set of GM 1011081 heads that have been completely redond and have a three angle valve job and the specs are 1. Agree with cc'ing heads and piston tops to see what youre true compression is. They yield average flow numbers, but respond to modifications just like any other small block head. Advertised Duration 262 int. But im pretty found of thees heads of course Ive ported them and have a 3600lbs heavy car with me in it and it will do a 13. New chamber designs, port shapes will blow away the 882's in my opinion. But certainly not "competitive" in a heads-up sense any longer, except for a fun cheep street machine. The flow numbers on 882s are not much less than small valve hump heads. 33CR a really small lunati cam nr 01003LK lifter kit nr. I know 67 and 68 camel hump heads for 275 hp 327 are the same, appearance-wise, having no accessory holes. Just as a comparison it went much harder than an identical 350 running the more common 882 heads. 0:1 compression ratio 76. Y. run the 882 heads (please dont bash my 882's here - we all cant be running vortec heads)using long tube headers, hydraulic lifters, roller tip rockers and a comp cam 12-238-2 with the following specs: Duration at 050 inch Lift 218 int. 5:1 CR. Camshaft Manufacturers Description Fair idle, Dec 10, 2020 · Vortech head outflow DH heads by MILES even ported DH heads cant even come close. Mar 26, 2012 · Having the most popular performance engine ever built, Chevy small-block owners are lucky indeed. the car will have new paint before Oct 16, 2014 · And I'm not sure that a 993 head is much better than an 882. The 492 was the over the counter replacement for the "camel hump" heads. should I change heads and what are some options. 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. 94-1. And they're still great for that. Jun 7, 2006 · Looking at 350-400hp with the right cam and setup. /0. Engine is going into a rat rod 46 Chevy so it’s just something to have fun with. I ended up with a set of 441s for $125. 25" wide and 2" tall Mar 22, 2020 · The heads are casting 882. 200 thru 0. The 350 4 bolt and 882 heads were free from my uncle. These were stock for 882 castings on L48s in '74, don't know about '75. Many classes of dirt track racing are restricted to these large chamber heads and the racers are looking for this casting number specifically. the engine is together but not back in car . Aug 17, 2001 · You should have 882 heads. Don't forget the tuning, I picked up . 94 Intake/ 1. 3-liter has shown that the 706 heads were worth 20 hp and 15 lb-ft over a pair of 317 heads, even with the 317's Nov 29, 2003 · Consequently, they are MUCH more prone to developing cracks, or developing them sooner, than the 1974-earlier heads. the same book says that if you buy an engine that has 882 heads they should be discarded. If my memory is correct, your heads have a volume of 330 cc intake port and Blakes have a volume of 310 cc intake port. The 1969-70 350/300 with it's 10. They are beefy for porting, but they flow almost identically below . The 882 heads had double heat-riser passage and were prone to cracking because they ran so hot. 25:1 compression ratio 63. The 882 heads are also prone to cracking in the exhaust ports. 33 cc 441 heads was a regular fuel engine. 5 seconds on 0-60 in my 454 suburban with a simple vacuum spring change. (I have both) The intakes are much straighter in on the sides as they don't have to curve around the pushrod holes like on the 882's. I was only looking for between 275 - 300 HP so I if I can pick up another 20 - 30 HP from the cam, intake & exhaust combo the set up will be right inline with what I had hoped for. That is the benefit of aftermarket heads. 94/1. Not like a stock 400 makes much power anyway. 72-1. The second engine is a Jasper rebuilt 1968 283ci with one 3884520 power pack head and one 3814480 ordinary head (lower Oct 23, 2021 · 882 heads were designed by Chevy to be used in 350 ci and 400 ci engines. 50" valve sizes. Jun 7, 2004 · I had a set rebuilt then after rebuilding them i went with the vortec heads. 3 to 8. It is NOT a question of IF it will crack, but WHEN it will crack. They are more preferred over the 882 head due to their heavier casting. Nov 10, 2008 · It currently has an edlebrock performer intake, eddy 600cfm carb, th350, stock converter, and 3. Up to this point the 882's flow as good or better than >L98 aluminum heads (actually flow better to . 50 exhaust) heads aren't the best, but I can upgrade in the future. These heads do have the accessory holes in them. 94 or 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 Feb 4, 2014 · These will run the higher RPMs easy and can be ported to make even more HP with little work. How do these heads compare to Vortecs? I am assuming that the Vortec head is much better, given GMs 30 hp rating difference when they changed heads. 350 std. The 882 heads were installed on the 350 ci and 400 ci engines (400 heads had steam holes). Horsepower levels ranged anywhere from 215hp to 250hp, depending on year and application. Before that Chevrolet used the 993, 487, 336 and 997 castings used from 72 to 84 on the lower compression engines. Sept. Buy a set of used Vortec Heads at the local junkyard ($210), Vortec intake manifold ($140), center bolt valve covers ($40), balancer & Gasket set ($100). Total $450. Jul 7, 2018 · C3 Tech/Performance - 76 350 sbc 882 head question - Need advice on raising compression ratio: Deck the block and/or use dome pistons? Trying to get to 10 to 1. 50 72cc chamber, #882. My 1977 Chevrolet advanced info shop manual shows all V8's (inc. 020 and use a GM head gasket with . Jun 11, 2001 · The 882's arent the greatest head but are the better choice of the 2if they arent cracked. This was due to the double heat riser passage. Apr 5, 2012 · The latter head was used in regular production on TPI and TBI engines in some Camaros and Firebirds as well as some full-sized models of Chevrolet, Buick and Pontiac. 400" lift. 040" over 283 engine, as well as the larger 327 Chevy. Producing 365 Feb 9, 2012 · The 1981 heads were casting 462624 , these were smog heads. Mar 25, 2016 · Exactly what I was going to say. I don't know where they got their info, but its not all correct. Despite the introduction of the LS engine family (see Modern Mouse elsewhere in this issue), the Jul 30, 2006 · You could probably expect 30-40 HP just by switching to Vortec or any of the popular after market heads like Dart Iron eagles, Edelbrock Performer RPM, etc. May 30, 2006 · THose heads (882) are not very thick or strong castings and typically crack between the valves. 460 lift, 222 duration) and an induction system consisting of a cast-iron intake and Q-Jet carb. These are "smog" heads and are prone to cracking because of the thin area between the two paths for the exhaust crossover AND because of this they run hotter than heads without the exhaust Unfortunately the 487 heads are very prone to cracking in the exhaust valve seats. 3 to 1 compression. If both heads are 1. The Bad News; these heads are crack prone!:roll: Nov 7, 2010 · option 2. He already has on order some 3. I recently had a chance to buy some vortecs for $100 but decided I wanted to keep the stock look. 50 exhaust. This head was 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. Not all GM 882 heads crack, in fact I would think there are more good GM 882 heads out there than bad ones. These heads with a flat top piston will come in around 9. 480/. 50 280/280 480"/480" runing down the 8th @ around 7. 02" intake and 1. Assuming the 2182 cam is this one? 3972178, 3972182, 12364054 1970 Z28 350 - 360 hp Lift . he has had the valves refaced. There are different variations of the 882 head, which has been stated already. Camshaft, Summit (PN 1105) in which the 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. Jan 5, 2016 · 441 heads are good flowing heads. 525 springs port and polish by buffulo racing fresh not run since rebuild $550 Today, I went and looked at a pair of heads (at the high school by my house coincidentally - Shop class teacher). I wanted to change to a 4 barrel. Regarding 993 Chevy heads, these castings with valve sizes were either 1. 94-inch intake valves designed to use unleaded fuel. The 400 SBC and 454 BBC are also shown as having 8. Ranging between 300-/350hp/ 330-370tq. It was kind of hard to tell because of the greese and it was night. Thanks! Sent from my iPhone using Tapatalk 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). - Super Chevy Magazine a set of stock 882 heads, stock 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. These heads were used on just about every small block race engine from the 70s to the mid 80s. I have built several 350's using Dart's Iron Eagle 180cc head with 64cc chambers and 2. Mar 25, 2003 · I was hitting high 13s with my Chevy 882 heads and Edelbrock Performer, you should have not trouble hitting mid 13s with your combo once dialed in. 5sec et 1/4 her is a 1/8 mile Film clip 8. Nov 21, 2017 · I’ve got some 1974 882 to heads on my 383. 60 valves, guideplates, 76cc chambers, 151cc intake runners. 50. If you use these heads in place of a camel hump head it will lower the compression due to these have a larger combustion May 10, 2020 · Basically, an 882 head is a good head-----until it cracks. These heads are also extensively used in crate and marine engines of power that ranges from 285 to 320 hp so they are widely available as rebuilds, used, and new and will deliver Jul 12, 2009 · I was rebuilding my 327 /210 hp engine. 50 valves. The 292 was indeed the "turbo" head. 84/1. Jul 23, 2013 · I have pretty anemic 350 in my 72 Chevy C20 pickup. Info from ad 340292 "turbo" heads angle plug 2. They were fitted with either 1. 60. They are 3986338 and 891 or b91. May 9, 2008 · In 1975 , a lighter cast head was released sporting 1. The stock 882 cylinder heads were refurbished and Feb 15, 2008 · I have been leaning towards using the 041 heads, it is a bulkier casting than the 882's casting. I ran a set of 487X's on my stock standard 350 with a 300 hp cam and it was a really torquey beast even with the low compression dished pistons in it. There were two versions of the aluminum head variant available for the ‘Vette during it’s seven-year run. and 400 ci engines (400 heads had steam holes). The quench on the VT are also far better higher resistance to detonation, Ther are books you should read there are tons of so called secrets that will get you stupid numbers on the cheap. 94"/1. at an afordable cost. Joined Jun 24, 2011 · 35 Posts #41 Jun 16, 2021 · His heads were 291 (107 CC) castings (mine were 840 castings) and his pistons were identical to mine. Looking to gain some easy bolt on budget HP. The lightweight are crack prone, the heavy are not. 275 dome piston with estimated 11. In stock form it only makes something like 180 HP and 300 TQ. Other side of the issue is using 882 heads or use different heads. 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. The 882 heads and tiny 929 factory cam are HORRIBLE when combined with the massive dish in the factory piston. They are 1970-80 350 heads with 1. 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. Right now I've got the stock #185 heads that have 1. 60" Exhaust Valves, all these heads had 76cc combustion chambers. Made a head change and went to 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 $$$. 050” on a 108 LSA that I used to run in a 327. 60") >GM 441 iron heads (actually flow better to . 500" as a 151cc smog head. 010"/. The 68 275 hp 327 has camel hump heads with the 1. Total $200 2. Oct 20, 2008 · I picked up my free 882 heads from my buddy today. It really depends on what your budget is and what you intend to do with your engine. The 487x casting is considered the best of the open chamber heads, err, the best of the worst Personally, I wouldn't put much $ into 882's. /270 exh. Jan 1, 2007 · Chevy Cylinder Heads - (Racing Head) Service With A Smile. Mar 1, 2010 · Judged on specs alone, the drop in cam timing was pretty significant. 4L and building a 78 Nova Description: 71-82 Chevy SBC 400 882/997 Cylinder Head. The 882's and 993's are 76cc. Not wise in my opinion. Dart told me that I could expect 40 HP with Dart Iron Eagle 180 heads over my pocket ported 041 heads. . You just have to calculate the amount to make them usable. All I really know about them is that they are 2. The goal is to build a fun street engine. 60 stainless valves. I'm not a big fan of World heads. then went to low mile junk 82' vette heads because my 78' nova was my only car in HS and shortly went to Jun 27, 2010 · Remember that the '461X heads were used in 1961, 1962 and 1963 with valve sizes 1. Popularized by Smokey Yunick and Bill Jenkins. 94 & 1. 60" exhaust valves, whereas most 461 heads came with a 1. 475 at the valve is best 0. 94 intake. 02/1. Apr 16, 2022 · These were one of the go-to heads for years in circle track on factory iron head classes. 485 Dur @ . Nov 8, 2005 · im wondering what i kind of gains and compression i could get out of running a set of 350 vortec heads on my sbc400. ANY 1975-later (with a date code of around Aug 74-later) PRODUCTION SB head is a lesser desireable head. 60 stainless steel valves w/. /224 exh. My car is a '70 el camino, 350sbc, 882 heads, flat tops, some kind of RV cam, RPM Air gap, Eddy 1406, long tube headers with mufflers, HEI, TH400 with shift kit n 3. 305 cc 186 heads was a premium fuel engine. The 113 'Vette head is virtually identical to the Dec 11, 2007 · Any engine you use them on will make another 40-50 horsepower and like amount of torque over the 882's by simply bolting on a pair of Vortecs or vortec clones from the aftermarket. I have added headers, intake, roller tip rockers, it has 4:10 gears and a finely tuned Qjet. The 041 is a heavy cast head with 64cc. Jan 24, 2015 · Sportsman II heads aren't that great out of the box the exhaust needs help I've herd a million times. BEST PRICE, BEST QUALITY ON THE NET! THIS IS FOR A PAIR OF CYLINDER HEADS with 882 CASTING NUMBERS Details Heads are thoroughly cleaned and inspected Pressure tested to ensure no cracks or leaks Guide work The 487X has bigger inlet ports. Just sold an extra set of the good 2. However, even with a 4" wide chamber and large valves, these heads will still fit on a . lbs more torque and 20+ hp more ported exactly the same, because of their better chamber shape. gervua ebjv nnpff byfh utgfn bqtxv xinoso fdajws utvcyj outs