882 vs 487 heads. Register or Log In To remove these advertisements.
882 vs 487 heads I would love to use an aftermarket set of heads, but at this time the funds are just not there to warrant a changeover. Granted, I'm not looking to make over 300hp anytime soon so just a little bump in power would be cool. 200-. What are the 882 flow numbers The 882 head is a 75-later head-----NOT GOOD. I haven't dyno'd yet but I'm assuming ballpark of 350-400hp. Reply With Quote. Save Share Reply Quote Like. For me,the 193 would win hands down. 02" intake valve size. 050-inch lift and 0. Also, and I think this is a big 487x heads flow the best out of all the big chamber medium valve heads (1. 030/400 crank=334 CID). 94 intakes and 1. 355", 9/1 comp flat tops, . 487x, 487, 993, 441, 369, 882, 991 core heads for sale starting at $250 and up Or can sell completely redone ready to bolt on. 450 The valve angles and backside shape of the valve are what works that part of the curve. HT 283/ ALUM-GLIDE. from my experience the 487, 487X, and 441, 441X heads are the best flowing. If I were going to spend $$$$$ on a set of production type heads (I'm not referring to over the counter perf type heads such as the Bowtie versions) such as the 487s, my choice would be a set that originally have 1. This was due to the double heat riser 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 . The L31 Vortec heads have larger ports than the older Gen I cast steel heads, so they outflow the older heads. $75. 487X For IMCA Stock Car When I install 882's I use the intake manifold restrictors on both heads, this helps reduce the cracking of the 882's! It's been maybe 10 years since Hot Rod Magazine did their "Head of the Class" article on small block chevy head flows. With the 487 head it got 18 mpg and ran right at 100 in the quarter. The 882 heads are fine if you just want a engine that runs. The 882 was #5 of the five castings tested, and casting 041 was the best. Consequently, your 487 heads are among the better of the early (71-74) big chamber SB heads. I’ve got a pair of 487x heads that I ported 25+ years ago. There's a company remaking 461 heads cast in aluminum, and with larger 180cc runners. But I used them with a good piston to build compression and 2. 60 valves. See listings near me. Jump to Latest 7. 9 Cast iron stock production or aftermarket steel stock replacement heads are permitted. These heads also have 1. This head was tested with the 1. Core heads 487, 441, 993, 882, 997 $150 a set Core heads cleaned & magufulux 487, 441, 993, 882, 997. therefore they may not be allowed in your rules if they state STOCK production head. 94 /1. 050" duration cam, and forget about a lumpy idle sound. 050 intake duration stuff for some budget street builds. GM cars must be 76cc heads or larger (approved head numbers are 336, 339, 388, 441, 454, 487, 624, 813, 882, 991 and 993). 00 for the set ready to bolt on. 882 vs 492 heads (kinda long) 487's are a good head and the 487x's are better, also very rare and "should" have 2. Too long ago. Actually any 76 cc head is . Porting and/or polishing is not allowed. I will not invest more than $150 in these heads for sure. Those were great heads in their time, but pretty constricted flow compared to almost any SBC head today. C3 General - 882 heads - Hi, I'm gonna be building an engine somewhat soon. 15x8 Centerline warrior wheels. The 993, 487 and 441 are fairly similar, with one of the main differences being the 487 and 993 both have a little better chamber design than the 441. 487X 1. I want to run 350-375 hp on pump gas and keep C/R at 9. 4K views 26 replies 14 participants last post by Pwrtrip75 Mar 12, 2007. I'm not sure you are there yet. 641-485-0975 call or text ALL GM CASTING HAVE NEW Cleaned and crack checked sets of 487 and 882 small block Chevy heads. The 882 castings had a double heat-riser passage and were prone to cracking beacuse they ran so hot. 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. With some cleanup & porting,the 193 makes a pretty good head. Hotrodding Basics. ----- 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. ported heads and intake, built 4L60E w/ corvette servos, B&M shift kit. com or in the April 2013 issue of Hot I did extensive flow testing on several of these particular castings, and was not very impressed with their flow characteristics. Furtherore, I am leaning towards on older pair of used 882 heads, w/ no work done to them. however flow flattens out from . If you use these heads in place of a camel hump head it will lower the compression due to these have a larger combustion C3 Tech/Performance - Best cylinder heads L82 original engine - Hi everybody, I wonder which is the best cylinder heads to a L82 original engine for Corvette 1979 owners ? I found these choice, each one has a different 487 heads i have a set on mt 350 except mine are 487x been looking for flow numbers cant find any not even on stan weiss, im thinking they flow close to camel humps somewhere around 215 intake at 500 lift. 60 valves and made about 465 hp out of a 355 with them. 480/. 02 for the LT-1 engine. Both were used between '64-'66 on the 327cid and had 64cc chambers. Can ship very cheap. The 487 heads are quite decent for what they are. 92 for the base engine the 2. As well as the 882 head. That is the benefit of aftermarket heads. If you are limited to older heads, the 487 flows best of the stock production heads. 94 valves and the 76cc chambers. Before that Chevrolet used the 993, 487, 336 and 997 castings used from 72 to 84 on the lower compression engines. the 882 heads were installed on the 350 ci. 1 2 3. . just using what i have for now, so if your budget permits go newer cause a set of vortec flow stock around 225 at 500 lift. 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. Neither had accessory holes. Need machined still but verified good. Wendell T. Everything I have read and been told (I have not had the heads off of mine to confirm), the chamber size is 76 cc. 441 and 487 are hard to come by where I'm at. The 'factory' heads have a "fly-cut" relief machined around the chamber intake valve area to unshroud the valve. they came off a running engine. At this point, I bring only a few questions to the table. $1500ish for the pair assembled. If you use these heads in placeof a camel hump head it will lower the compression due to these have a largercombustion chamber. 979. You just have to calculate the amount to make them usable. I weighed a 882 vs sportsman and The 882 heads are smog heads from '74 to '80 and not very well regarded, but neither are stock '85 heads - if you can find out more about the 882's they may be better than your stock '85 heads - ie not only polished & ported but if milled so they will give higher compression and if valves were changed to 2. Chinese Heads Vs 624. I’ve also got some early 882’s, 441’s, and maybe a set of 993’s. Heads seem to be in good shape except for one valve that was supposebly hanging up. I've also heard they aren't prone to cracking like the 882's. 480 lift cams with 882 heads, use the Z-28 type valve springs, watch for retainer to guide clearance, most will clear if you use an umbrella or o-ring type seal, do not use the tin shields or valve rotators on the springs. Here is a quick 'cheater' list of common head CC and valve size(s): Unfortunately the 487 heads are very prone to cracking in the exhaust valve seats. 624’s and later 882’s go directly into the scrap metal pile. pcesak Discussion starter. 420" lift stock, and I don't have the money to have them machined to accept higher lifts. 641-485-0975 call or text ALL GM CASTING HAVE NEW Curtis, I have a set of GM heads that I pulled off a Mercrusier 350 engine that have casting #'s 14096217. " I had a set of 487X heads on my '73 Hatchback Custom 20-something years ago, which I In 1975 , a lighter cast head was released sporting 1. They don't have 3/8 pushrods, tho the later models use drilled out push rod guides and self guided rail rockers like the vortec. I need to run them across a flow bench and see if they are worth rebuilding. 60". The 487 and 487X have the same cc's but WERE exclusive for LT1 corvette in early 70s. If they can do that, he'll use them, if they aren't gonna out power the 882s then he'll just save them for another project or sell them. I'm looking for a little input on what everyone else has seen. from my understanding 882 heads are good for boat anchors and door stops. With a little bit of work, they will flow nicely for a driver/cruiser. The 862 heads flow well and come with upgraded valves, springs, and cams, making this a great upgrade package. 0122, 7am-10pm CST, everyday. Casting number is 3973487. As to heads for a 400, for my money the Dart SS heads have been a The reasons that 882 heads have cracking problems are that the heat crossover passage is fed by the center cylinders and that they were the first of the GM induction hardened seats. 60") 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. Hey, if you already got them and they are in usable shape, doesn't hurt a thing to learn porting on them. 01 1. M. 125”-. The 441 or 487 are a much better large chamber head (in my humble opinion). They are more preferred over the 882 head due to their C3 Tech/Performance - 487X head - I have a set of 487x Cast Iron heads. 66 posts · Joined 2002 Add to quote; Only show this user #1 · Mar 28, 2003. They are beefy for porting, but they flow almost identically below . Then here's the kicker. Pioneer H/U. Am I 13. @dirttrack 55 If you have a set of S/R Torquers, they're not a bad head, but they are dated as they're designed after the 882 smog era I was in my mid 20's and had tried many casting number heads 186, 041, 624, 882, 993, 441X, 461 the only difference i could tell is when i either the intake runner is a bit larger, or the larger 2. I pulled them off of the 350 Block cast # on block is 3956618. 94 valved 993 head, and can always add to my stash of 882's. I have 601 heads on my stroker 305 (+. At best about 205cfm (with 2. better flow, better chambers, after modifying the springs you can run a higher lift cam. both pairs of my 487X heads came off of corvettes. Cast quadrajet intake, 750 cfm quadrajet, hei distributor. 882 heads were designed by Chevy to be used in 350 ci and 400 ci engines. you are probably the only person that would notice the "wrong" heads and intake on the motor. I have read several articles recently where folks are I didn't post the original question. The '72 LT1 used 916 Big valve 76cc low CR heads aswell. Any help on the Original 461 camel hump heads have smaller runners than the 487 heads. coryz28 · Registered. They are equipped with 2. Both were excellent OEM heads. The Vortec heads are a little bit lighter than the older heads and have a “kidney” or “heart” shaped combustion chamber that is more efficient than the double hump chamber. Brown of Kansas City, Missouri, asks us if late 350 Chevy TBI heads will work on a carbureted 1970s short-block. The 993 heads were used in 72-73 Chevy 350s, many of them were the 250 horsepower version. and they are cheap compare to other aftermarket heads. Cast rams horn exhaust manifolds, his has headers so I am hoping he will keep them. 117 posts · Joined 2002 Add to quote; Only show this user #1 · May 30, 2006. 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 Multi Angle Valve Job. 4. 9:1 using a . Lastly I have a set of 305 HO 601 heads with 1. but again, that isnt 100% guaranteed. Flowmaster, CAI, Comp. P. Someone slapped a set of 882 heads on it. From the brake to the throttle, no power braking, the car would spin the tires on the 1-2 shift with the 487's but not with the 882's. It's hard to give advise with the limited info you supplied,especially the cam specs. I can pick up a rebuilt set of 624 heads for $100 through a private sale which I could then just throw on the truck and drive. We had to run 'smogger' heads and nobody would use an 882. The high lift flow is limited on those heads by velocity and port Volume. '55 BELAIR 2 DR. I never claimed to know everything. Do not believe the info from the internet Cylinder head flow data base that says these heads flow 206cfm . 641-485-0975 call or text ALL GM CASTING HAVE NEW There are different variations of the 882 head, which has been stated already. Find out the answer here on HotRod. 862 head is an option for the 4. Any head with "scalloped" bosses around the outer/lower head bolts, or thinner castings, will be somewhat crack prone. Willing to machine and sell bolt on ready as well · This listing is far from your current location. 882's are plentiful, but I have heard the debate go both ways on how well they flow. 1564 posts · Joined 2005 Add to quote; Only show this user #6 If you ran a 1. 641-485-0975 call or text ALL GM CASTING HAVE NEW Testing power curves of 8 small block cylinder heads - Chevy High Chevy fitted with a Comp Cams Xtreme Energy 274H with 230/236 degrees of duration measured at 0. ALL GM CASTING HAVE NEW VALVE GUIDES. The 492/292's are replacements and were not released on stock vehicles. I also have a set of 993's off a 72 350. travis wrote: ↑ Sat Jul 25, 2020 3:19 am I’ve got a few sets of useable iron 76cc factory sbc heads left that I would eventually like to use on something. 5" BDS suspension lift. 333882 or 14102193 Does anyone know which heads have better flow? Both have 1. 3 to 8. 6. The 882 heads are also prone to cracking in the exhaust ports. While these heads are not available new from Chevrolet, we have a good supply. The heads you have now have big chambers and the tiny 1. I own a 55 wagon with 624 heads. I'd almost be willing to bet that nearly ANY aftermarket head would outperform a 487 head. 800 watt amp Everyone running Dirt Track Factory Stocks wants to know, “what’s the best heads to run”? This video will give some insite. _____ I was wondering out of the 3 heads which would be the better choice. Check out this site for the break down on some of the different head configurations for performance small block chevy heads. I have seen where people talk about doing machine work on the 461s vs. Greetings and Happy New Year from the new guy to all of you out in hot rodder land. 5 valves and open them up to 2. He downplayed the 461 heads vs. I don't know about vortec casting numbers but I've always heard that they flow good and are about as good as it gets for stock heads. They are the ones the circletrackers look for around here when they can only 487 and 993 are best 76cc heads, followed by the 882 that came out in 74. Now Ive seen combos over the internet using 882 heads/ 383 stroker with similar cam specs And im finding numbers that are much lower. this is what i found on the heads: the 882's were installed on Chevrolet engines from 1974-1980. 50E valves: the casting number was 333882. It was fast till I missed second gear. Before, I ask them, let me throw out some info on what I am doing. I found a set of reman 333882 heads with 2. 02, 1. 75 cc chambers came on 71-72 LT-1's runners are 161cc intake 61 cc exhaust I had a set machined with a He just wants to know if the 350 will run better with the ported 283 heads than with the smogger 882 76cc head he has now. I'm looking to make at least 350 hp, but I'd like the torque to be a bit more. After getting these heads I'm still at zero dollars for this entire engine. 02,, It is a 39700010 so a good block, but it came with 882 heads on it. Until now, I find its performance is still very nice. burkej62 Discussion starter. One of my friends says he'll give me his 882 heads for $300. 487x, 487, 993, 441, 369, 882 core heads for sale starting at $250 and up Or can sell completely redone ready to bolt on. Im not real big on that cam either. Those heads (882) will make the power your after but they are junk, anytime you have a head that the heat cross over gets into both exhaust ports it not a good ideal, the 441 head would be a better choice. Except they weren't. 50 or 2. Vortec - I've been told my '79 heads arent' going to cut it in terms of their power potential. 94/1. Did the L-82 out of the factory come with the 882. A few people thought that was BS. 041-inch head gasket. You want a set of 487x heads if you can find them - larger 487x are among the best, if not the best GM head of that era besides camelbacks or equivalent. I have 882 heads, ported, milled, 2. 882's (Graphs from carcraft. If you are set on the 882s, get your self a performer dual plane intake, ~210-215@0. 400 inches on. the center bolt valve covers didn't even throw too many people off. Save Share 882 heads vs 186. 72/1. and 400 ci engines(400 heads had steam holes). K. 487 is good flowing head, just no hard seats, nither does the the 461. The specs are @5500rpm 390hp/ 4500rpm 412tq. We can also modify your open chamber heads. Now, pocket porting obviously doesn't bring My 487 heads had stock valves, so did the 882's. Cams 266/270 cam. Performance. The 1947 - Present Chevrolet & GMC Truck elses time and money and have them make a desktop DYNO comparison between some good 305 heads and some open chamber heads like 487 or dare I say 882. 36x12. The 882 heads are common 76cc chamber heads, flow OK nothing great,, i have 3 or 4 pair of the 882 heads and i cant give them away,, I have them on my 355 SB nothing spectalure just a . Good for a low rpm truck applicationand thats about it. Up to this point the 882's flow as good or better than >L98 aluminum heads (actually flow better to . 94 head with induction hardened seats. 487X - My 72 L-48 came with 487X heads. The intake valve sizing is 1. I've never seen a 292 head, but thought I read somewhere the sportsman were copied off it or something. These heads will also interchange with double hump heads with casting numbers 370, 461, 461X, 462, 291, 292, 186, 041, & 492. 487/882 Chevy Cylinder heads. The 487 have 180cc runners, while the 461 has 160cc runners. Unless the cost is only a couple hundred bucks, the 487 heads are completely reconditioned, and you need to replace a set of worn 882's it's not really worth the time and gaskets to make this swap. HT "383" STROKER / TH400. 500 lift springs and 3/8" studs and guide plates seems cheep about 320. We build quite a few engines that require a stock casting head. 50) these are highly sought after and would give you a small performance boost over your 624 or 882 heads. The heads on my truck are of the 882 variety which need will need a good cleaning and re and re. com database) 291vs. Small Block Chevy Heads This is what is says about your heads. I'm not a big fan of World heads. 490 487x, 487, 993, 441, 369, 882 core heads for sale starting at $250 and up Or can sell completely redone ready to bolt on. Good 882s Heads any good? Jump to Latest 41 - 44 of 44 Posts. User Info. Jump to Latest the 993 heads on it are tired and likely need an overhaul. Which a review of L48 is in order. Aftermarket head numbers are: GM – EQ Part #CC167ES2 3973487 vs 462624 Heads. I'd also like it to have some low end power, since my rear gears are so high. Hey, i dont know for sure on anything but i have 2 pairs of 487X heads. 487X For IMCA Stock Car 2. 487X For IMCA Stock Car I'd almost be willing to bet that nearly ANY aftermarket head would outperform a 487 head. 041 and 186 heads, when the only real difference is the accessory bolt holes in the end of the head. All new parts, all new valve guides. You may want to re-think this a bit. 400" lift, so I'm not sure if they are worth the extra $$$ outlay. 495 lift After replacing the factory 882 heads with the 180cc RHS Pro Found out it's bored . 6 valves. Also,the 193 is a much more efficient head. I may be wrong,but,I don't believe a stock 882 will outflow a 193. The 993 was OEM from 1971-76 domestically (US/Canada), 993 heads are practially the same as 882. 882 SB Heads VS Dart Iron Eagles. The Vortec heads are not that much better than the 882's below . Likes: 160. Heads must 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). 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. They were used on the LT-1's in the early '70s. For less than $600 complete you could be into a pair of decent imported bare aluminum heads assembled with quality parts that will easily be 80HP+ better Tech Help. 641-485-0975 call or text ALL GM CASTING HAVE NEW 487x, 487, 993, 441, 369, 882 core heads for sale starting at $250 and up Or can sell completely redone ready to bolt on. 10849 posts · Joined 2006 Add to quote; Only show this user #1 · Dec 31, 2009 (Edited There are much better heads out there, but for a budget build, with someone who does most of their own work, they're usually more than adequate. Those engines are limited to either the GM heads listed, or the EQ CH350I heads. 94" and 2. Do I just keep the C3 Tech/Performance - 487 heads - hey I was wondering if anyone knew any more about 487 cast heads than the fact that they're. I guess it just depends on what We have been working with the Chevy “Open Chamber” heads for years. I know the 993 casting is ok but they are pretty crack prone in my experience. To the OP, I'd get another set of aftermarket heads. buying new, already prepped heads. I had a set rebuilt then after rebuilding them i went with the vortec heads. MA69CAM Discussion starter. 5 with Erson Valves & Springs, Myself, I don't think much of any of the 76 cc heads, and 993 and 487 are both that. I don't know how much you may be familiar with SB heads, BUUUUUUUUUUUT, 74 was the LAST year for "good" production SB heads. One big drawback you have to have a different intake. From: Two Lane Black Top. I'm afraid the heads might need alot of work. 60 Valves I know that I have both a set of 624 heads and 882 heads sitting around in the shed and I wanted to get everyone's opinion on whether or not either the 624 or 882 heads would be a worthwhile upgrade from the dreaded TBI heads in terms of power. 993 vs 882. 02, I have a 72 w/350 base engine with 487X heads. Since aluminum heads can tolerate a slightly higher compression ratio, Trick Flow equips the Twisted Wedge head with a 63cc combustion chamber (the 882 castings typically have 76cc chambers). I guess a 1/4" thick seat would have worked, but I never felt comfortable with a seat that thin. Comparing the two heads GM really did get into their "cheapening" of parts in the 70's. 993 Chevy Heads And Chevy 882 Head Specs Comparison. if they are cracked, I may wind up going with some 487's Older performance head but with the (smog) 76cc chambers. 487/. I have a set of 993 currently that I may use on the primary engine. As you mentioned getting a set of heads from work. Post: Which is the better head 441, 487, or 487x (Topic#227986) Impala_ss Forum Newbie Posts: 78 Loc: Bellevue, WA Reg: 04-09-09. In that thread, I advised the original poster Diabolic, to get his GT40 heads pocket ported, because for around $300, you can unshroud the valves and get some stock heads to flow as good as name brand heads. 02/1. I use them on my circle track car and they seem to perform much better than most other stock heads. The castings General Chevelle Tech Area. 0:1 CR with a fairly thick head gasket. JIM '59 IMPALA 2 DR. I had a 350 out of a vette in a 70 gmc pickup some one told me it was a L-82 and it did have 882 head's. 450" lift cam, 882 heads, 2 plane intake, I was just working on some 882 heads, and was looking for input from others that have worked on them. MOST that I see are cracked!! In your case a pair of MAGNAFLUXED 882's would be the best base for a street head. I’m thinking 350-400hp, 224 to 230@. Many times the nicer HP 882 heads can be picked up cheap as people don't realize which version they have. Just sold an extra set of the good 2. Jump to Latest 76K views 33 replies 21 participants last post by 68Chevele Oct 27, 2020. 500" as Stock 882 vs. Many classes of dirt track racing are restricted to these large chamber heads and the racers are looking for this casting number specifically. I think the 487 was the first low compression 1. The 487 heads look a bit better than the others, but they are very prone to having cracked exhaust valve seats. Located in Runnells IA. The condition of the heads is more important. My boss has a set of 487 heads that were run on a race car engine for one season. BBC 820 heads vs 049s or 781s. First heads I ever did porting on were similar 993 and 487 smogger castings, if you mess up you aren't out a whole lot(you didn't ruin a good casting), strip the good valves, springs, et cetera out and buy a pair of RHS Pro Torker or World S/R Torquer castings there's already a few posts on this subject, do a search on 882 and lift, but here's one from a post by BOBCRMAN; it is common to use up to . If you want to port a large chamber smog era head do a C3 Tech/Performance - 882 vs. 882 heads Put the humps on--they are better heads, if you can deal with no holes in them. As for an estimate of power I can't say but if the vortec heads work well with the bottom end it has its a safe bet that it will have more power than it did. I know it is period correct for the 71-72 production years on Chevy's. 94 valves. Multi- Angle Valve Job, New Stainless Steel Valves , 1. The vortec head is a better flowing head than the 882 although to be used with that cam they will have to be machined to handle over . They are most likely 1. So i changed the cam to dur@50 230/230 valve lift . Register or Log In To remove these advertisements. 6 valves were used with the "X". 10-18-09 10:59 AM - Post# 1790411 Looking for heads for a mild sbc 400 build Email Report C10 Sleeper Valued Contributor Posts: 3426 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. Too bad shipping would be so crazy shipping those headsI need another 1. but the cost of the new vortec Cleaned and crack checked sets of 487 and 882 small block Chevy heads. Good torque motor. They are the best of the smog heads. If your rules require the use of “open chamber” heads, the ‘441, ‘487 & ‘993 heads work the best. The 882 intake port is very close to that of the 624, the exhaust side is where the 882 is weaker. 600" valve in a 487 head you just about couldn't put hard exhaust seats in because even using a 5/16" deep seat you'd cut through to water on at least one seat pocket. 10 Cast iron stock production or aftermarket steel stock replacement heads are permitted. It's gonna be a 355. 5. These are commonly called "Camel Hump" heads :yes: This refers to the two 'humps' on the front pad of the head These came in both 1. Posts: 487. The heads from my 350 say 333882 , I did some The 487’s could have either 1. "461" heads were cast with either 3782461 or 3782461X. Can build to your Specs too, can ship. They don't make any power. The earlier 993, 441, 487 and others are getting to be more and more scarce. I currently have 882 heads on my 383. 60 stainless steel valves w/. Would I gain anything by doing this or is it just being able to say I have aluminum corvette heads on my GTA. 02's. Where as a 882 head isn't a closed chambered head and is 76cc combustion chamber. He wants $200 for them. By comparison '96 Vortec truck heads are about 230 cfm. Kole Audio 600 watt amp powering dooor/dash speakers. i have a set of low mileage 882s from a previous head swap sitting here clean as could be and complete. Talk to the experts. 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 "standard" 461 head's intake port volume was 161cc, exhaust was 62cc. The 291's are the old double humps with 1. i don't know how many people asked me if the motor in my 71 Nova was stock- i had the vortec heads and the matching Performer intake. He's not looking for stellar performance, just better than now. It isn’t hard to notice 882 heads are 400ci small blocks with a pretty consistent 200 CFM rating in a C3 Tech/Performance - Another question about heads. '68 CHEVELLE SS 427/425 - 4 193's are just a stock, post 87, GM head. 06-10-2005 05:59 PM #3. If you have these on your engine, get rid of them. C. @dirttrack 55 If you have a set of S/R Torquers, they're not a bad head, but they are dated as they're designed after the 882 smog era My first comment would be that when putting together an engine the pistons, cam, and heads etc. B. I put on old power pack 283 60cc chamber, small valve heads, and man, wow!!! The 882 heads were low compression, smog heads, heavy duty castings. 00 each from Jegs, but you have to have a Vortec intake,, just my . tom . The 113 'Vette head is virtually identical to The 882 castings are truck smog heads and are junk - the port and chamber layout is horrible, and they always crack. With the 882 heads it got 16 and ran 85 Found out one of my 882 heads was cracked in the valve seat area. They are D chamber also. 50 valves. Valves were 2. 30 huge domes, fresh everything nice cross hatch in the bore, forged rotating assembly ARP studs, and the works. There was a big difference in performance. I use to own a 76 corvette--350 with 992 heads. 480 with a 750 cfm and single plane. 96 valves, 3 angle valve job with . When One cracked I put a set of 487 heads on it to drive for the summer. 84 valves. I don't have any rules to go by, but the topic fit what I have. These heads willinterchange with casting number 487, 487X, 993, 882, 624 and many others. I am trying to find some information on the heads. of course, everything underhood was painted up to There is nothing special about the 487, 487X heads. If you want to port a large chamber smog era head do a SBC Heads I thought I recognized those head numbers. 641-485-0975 call or text ALL GM CASTING HAVE NEW Thumper cam, street dominator intake, 882 heads and powerglide is a recipie for a car that is slow AND gets terrible gas mileage. Step back in time with our modern reproduction of the iconic Chevy 461 double hump cylinder heads, now cast in lightweight aluminum! In this video, Joe and Wyatt discuss the features that bring the vaunted camel hump heads into the 21st Century. 50 with 75cc chambers. 487/0. 56 gears. They are a pretty thick casting and only have a single crossover, so they are not as likely to crack like the 882's and such. They have 2. I've heard that the EQ Stamped head doesn't flow as well on the exhaust side as say the old castings. i always work for a bell shaped curve with as much mid lift as It will produce. PM me with any questions. Theseheads will also interchange with double hump heads with casting numbers 370,461, 461X, 462, 291, 292, 186, 041, & 492. With a 0 deck and a . 02 /882 cast heads . Someone buy my truck: PM me-1998 Zr2. They have good inlet ports and are How much better of a head is the 487X compared to the 882 and the 624 heads? I know they have a different design and a little better flow. The earlier 993, 441, 487 and others Ralph67, could you shed some more light on where these heads like to be opened up? I've got a set off a 69 350 I've been thinking of working on. 2" PA body lift. 6 valves). Lingenfelter book says that my 487X heads are great flowing. 8:1, while the iron head compression came out at 8. The heads of choice back then were 441, 993, 126 and a few others I can't recall, but absolutely nobody would run an 882 because they were so bad. 150” dome which is typically around -4cc volume, this would create right around 10:1 compression. This motor ran very well with the roller cam setup and these heads, Don't know if they are "true" vortec's, but it did run very well, Healthy motor, Problem was, the block cracked and had to replace the motor,,,Hope this helps,,,,Perry. Double hump casting marks. RHS Pro Action 180cc-HPWhen you realize a gain of 65 hp from The XR264HR cam offered a . Mileage was up to 18 with the 400 heads. I usually use 441, 487, or 487X those 3 are getting harder to find every year. I would rather see the flow flatten at full lift and have a bunch more at . These heads were used in various SB Chevy's for the 72-73 production years. But I have never heard or read about the 487X on a Vette. Call 800. 60") >GM 441 iron heads (actually flow better to . This head is a great upgrade and a bolt-on option to increase power. From what I have read the 487 castings came std on the L-48 and the LT-1. Using flat tops with the 193 tho would prolly land you in the 10:1 CR. Jump to Latest 14K views 14 replies 6 participants last post by MA69CAM Jun 18, 2006. Ready to bolt on. I think this is what gives these heads a bum rap, because they are the most common head out there, and naturally you are going to see more of them, cracked and uncracked than anything else. No porting. 02 etc they will be better than what you have now. The car got better mileage and had more power. They are crack pronemore so than any of the earlier 76cc heads. 4L Modular V-8 engines. 5, New Erson Springs, Retainers & This is an extension of the "Do These GT40s Look Ported" thread, so to speak. 641-485-0975 call or text ALL GM CASTING HAVE NEW C3 Tech/Performance - HEADS vs. I use the IMCA-legal EngineQuest CH350I heads for Southern SportMod dirt track engine builds. 5 valves. i'm pretty sure theyre not cracked. The 624 from about 78 on is total crap. both pairs of 487X have the 1. 882 SB Chevy heads. OVER THE COUNTER GM IRON HEADS i got three sets and they are all from trucks, they make decent torque power but they suck still. FWIW if your doing that much to your engine, I think you should change the cam as well. I didn't measure chamber voluumes but don't remember having them milled. I was involved in limited class street stocks for about 20 years. I am lookin for some 993 heads because my machine shop guy says thats the route I wanna go. 94, 1. Jump to Latest 11K views 8 replies 7 participants last post by andybird Mar 28, 2003. 6L and 5. You can get a decent set of 487's or 993's for a good price, have them reworked and drill steam holes in those. 450" lift. $225 a set 487x heads also available Heads ready to bolt on fully machined with all new 882 SBC heads. IIRC the 882 has both center exhaust ports feeding the heat crossover in the head, while the 993 feeds the crossover from one port on each side, like most early small blocks all did. 7. 441 heads are good flowing heads. kettbo Discussion starter. Send Private Topic View Profile. The reason that the earlier iterations of this engine cracked was due to the fact that they ran really hot. And he didn't mention 487 heads, which are "pretty good" heads for a 76 cc head, though many are cracked. Beginning in 75, Chevy started cutting corners on the SB heads, and by 77 they were basically junk. It ran 85 with the 992's and almost 100 with the 487 heads in the quarter. The issue is that everywhere I read says the 624 heads are absolute junk and not worth spending any money in them. Most Practical Cylinder Heads for 383 build up. New valve guides, if needed. sorry if my questions are dumb. Joined Jun 24, 2011 · 35 Posts #41 C4 Tech/Performance - L-98 cast heads vs aluminum - Let's say I have an 89 Trans Am GTA and I wanted to install a set of L-98 aluminum heads from a vette. 461 vs. In general I think the 993 is considered a better head than the 882, a littler heavier casting too. like they said 487's r the better choice ithink they produced 270 hp on the 70-72 lt1 engines the 487x heads had 202 intake valves and produced 330hp on the lt1's the thing is you cant find the flow numbers anywhere if someone knows where please share this info i guess that the 487x's flow bout the same PM with any questions. 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. These heads are very similar to the 441 and 493 400 small block head. They were one of the last, true good casting heads chevy made, besides the 487 and 487X heads. My main issue is that the Vortec heads are only good up to about . Worn guides and seats could Looking at 882 more likely for a back up engine. 94I and 1. 0 Jan 4, 2003 | 11:21 PM Share I've just had really bad luck with 882 heads. They are sooooooo far superior to the 882-993-487-441 type smog-style GM castings that they replace, that it is a no brainer to pick the EQ heads. 50" lift springs and 1. GM cars must utilize 76cc heads (approved head numbers are 336, 339, 388, 441, 454, 487, 624, 813, 882, 991 and 993). I have a chance 14. Thats what I was always told. 041-inch gasket, compression computed out at 9. I'm sure there are folks out there that have had these heads last a long time. I understand these heads flow similar to the old camel humps and the open chamber 882 heads. Ranging between 300-/350hp/ 330-370tq. for a mild street engine wich heads would you choose 882 or 487 ? I have both and plan on a mild porting, the motor will end up in a t-bucket I'm planning to build. 030 over 350, they are a good head for a daily driver,, but any high performance get the vortecs,, 325. And I'm not sure that a 993 head is much better than an 882. These heads will interchange with casting number 487, 487X, 993, 882, 624, 441 and many others. --Steve Reply. Willing to machine and sell bolt on ready as well Types of GM Vortec Heads. Sportsman II heads aren't that great out of the box the exhaust needs help I've herd a million times. The 862-cylinder head is one of the heads that you can pop in with decent gains. Please note the 882 head is a 76cc and the 461 is a 64cc. 350 low compression cast pistons, the worst heads Chevy ever cast 882's 76cc 1. 1865 posts · Joined 2007 Add to quote; Only show this user #1 · Mar 9, 2007. i was thinking about swapping the heads out and using a steel shim gasket to raise the compression as much as i could. I am looking for an inexpenisve iron head to replace them with. The swirl ports make them useless for anything over 4500. 02 1. All cylinder heads, cleaned and magnafluxed. 50 exaust. Hobbies I wanted to get 400+ hp/torque. I have been leaning towards using the 041 heads, it is a bulkier casting than the 882's casting. COMP RATIO Your stock heads (881/882) have a 76cc chamber and 9. Looking at the AFR 195 street heads. Are the castings different? Are the chambers smaller 487x, 487, 993, 441, 369, 882, 991 core heads for sale starting at $250 and up Or can sell completely redone ready to bolt on. $75 a set. Head Casting vs Flow Chart SBC Engine & Drivetrain. Using a . I have the 3973487X heads that are 2. all need to be in sync. 52 rockers. 50x15 Swamper TSL radials. barnym17. moeb grjdxyh dopqohs rcdonni fkdjo jguye nlt ocdmef befyq woeyq