Heads and cam.....here we go again
12-15-2018, 02:50 PM
#41
Le Mans Master
I would say off hand the solid could be a bit heavier but not nearly the weight of any type of roller cam. If I were to rebuild my current engine I'd be inclined to have the lifter bores opened up and use a chrysler lifter..the larger tappet diameter does a couple things that would be of benefit.
12-15-2018, 03:29 PM
#42
Burning Brakes
I'm going to be swapping my Performer 2101 for a Performer RPM air-gap on my 70 with a stock hood and stock drop base air cleaner after Christmas. According to the play-doh it should just fit. I'll post a new thread with the results.
12-15-2018, 10:12 PM
#43
Le Mans Master
I'll take a look at doing that. I'd like to keep the stock snorkels {two on my car}. Where did you find an .80 thick gasket?
https://www.jegs.com/i/Mr.-Gasket/72...iABEgLxivD_BwE
Last edited by REELAV8R; 12-15-2018 at 10:19 PM.
12-16-2018, 10:48 AM
#44
Le Mans Master
The Performer and the L-82 aluminum intake are almost exactly the same. The Performer RPM is good for, maybe on a good day with a tailwind, 5-7 HP on a moderate build, AND only at higher RPM..above 6,000 RPM. You will not notice anything if much on a moderate build of 350-400 Gross HP. Unless you plan to rev your engine consistently to 6,500+ RPM, put your money into the good heads, Roller cam and Exhaust with Long Tube headers. You will NOT notice 5-7 Gross HP on a 450 Gross HP engine build or even 10-15 gross HP, if you could get that much from an intake change.
I have said this before and will again. My builder who machined my L-82 bottom end during the build in 2014, is a former GM field Tech Teacher for 16 years, has an undergraduate degree in mechanical engineering, and has owned his own high performance build/tuning business for the last 8 years, building GM motors only/tuning with his own in shop Mustang dyno with 1000+ HP engines. This guy I guarantee knows more about building HP in all generations of GM engines and he told me in no uncertain words, UNLESS you plan to rev your L-82 355 with AFR heads and Howard Roller cam, beyond 6,000 RPM, that my stock L-82 aluminum intake, lightly ported, is pretty darn good...and to NOT waste money on aftermarket intakes...period! No one on this forum with VERY few exceptions can come close to his knowledge base and experience...I went with his recommendation with the stock L-82 intake and I can tell you in no uncertain terms that my engine is NOT choked anywhere in the RPM range. SAVE YOUR MONEY ON CHANGING INTAKES! the gain is insignificant for most mild to moderate street engines
I have said this before and will again. My builder who machined my L-82 bottom end during the build in 2014, is a former GM field Tech Teacher for 16 years, has an undergraduate degree in mechanical engineering, and has owned his own high performance build/tuning business for the last 8 years, building GM motors only/tuning with his own in shop Mustang dyno with 1000+ HP engines. This guy I guarantee knows more about building HP in all generations of GM engines and he told me in no uncertain words, UNLESS you plan to rev your L-82 355 with AFR heads and Howard Roller cam, beyond 6,000 RPM, that my stock L-82 aluminum intake, lightly ported, is pretty darn good...and to NOT waste money on aftermarket intakes...period! No one on this forum with VERY few exceptions can come close to his knowledge base and experience...I went with his recommendation with the stock L-82 intake and I can tell you in no uncertain terms that my engine is NOT choked anywhere in the RPM range. SAVE YOUR MONEY ON CHANGING INTAKES! the gain is insignificant for most mild to moderate street engines
Last edited by jb78L-82; 12-16-2018 at 10:50 AM.
12-16-2018, 11:54 AM
#45
Team Owner
Thread Starter
its one of these kits except mine is spread bore to accommodate the Q-jet
https://www.jegs.com/i/Mr.-Gasket/72...iABEgLxivD_BwE
https://www.jegs.com/i/Mr.-Gasket/72...iABEgLxivD_BwE
https://www.holley.com/products/fuel.../parts/3712MRG
The Performer and the L-82 aluminum intake are almost exactly the same. The Performer RPM is good for, maybe on a good day with a tailwind, 5-7 HP on a moderate build, AND only at higher RPM..above 6,000 RPM. You will not notice anything if much on a moderate build of 350-400 Gross HP. Unless you plan to rev your engine consistently to 6,500+ RPM, put your money into the good heads, Roller cam and Exhaust with Long Tube headers. You will NOT notice 5-7 Gross HP on a 450 Gross HP engine build or even 10-15 gross HP, if you could get that much from an intake change.
I have said this before and will again. My builder who machined my L-82 bottom end during the build in 2014, is a former GM field Tech Teacher for 16 years, has an undergraduate degree in mechanical engineering, and has owned his own high performance build/tuning business for the last 8 years, building GM motors only/tuning with his own in shop Mustang dyno with 1000+ HP engines. This guy I guarantee knows more about building HP in all generations of GM engines and he told me in no uncertain words, UNLESS you plan to rev your L-82 355 with AFR heads and Howard Roller cam, beyond 6,000 RPM, that my stock L-82 aluminum intake, lightly ported, is pretty darn good...and to NOT waste money on aftermarket intakes...period! No one on this forum with VERY few exceptions can come close to his knowledge base and experience...I went with his recommendation with the stock L-82 intake and I can tell you in no uncertain terms that my engine is NOT choked anywhere in the RPM range. SAVE YOUR MONEY ON CHANGING INTAKES! the gain is insignificant for most mild to moderate street engines
I have said this before and will again. My builder who machined my L-82 bottom end during the build in 2014, is a former GM field Tech Teacher for 16 years, has an undergraduate degree in mechanical engineering, and has owned his own high performance build/tuning business for the last 8 years, building GM motors only/tuning with his own in shop Mustang dyno with 1000+ HP engines. This guy I guarantee knows more about building HP in all generations of GM engines and he told me in no uncertain words, UNLESS you plan to rev your L-82 355 with AFR heads and Howard Roller cam, beyond 6,000 RPM, that my stock L-82 aluminum intake, lightly ported, is pretty darn good...and to NOT waste money on aftermarket intakes...period! No one on this forum with VERY few exceptions can come close to his knowledge base and experience...I went with his recommendation with the stock L-82 intake and I can tell you in no uncertain terms that my engine is NOT choked anywhere in the RPM range. SAVE YOUR MONEY ON CHANGING INTAKES! the gain is insignificant for most mild to moderate street engines
Edit: What headers did you use?
Last edited by Capt. Shark; 12-16-2018 at 11:55 AM.
12-16-2018, 12:22 PM
#46
Le Mans Master
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jb78L.
Before I would believe a 16 yr GM veteran I would believe the YouTube videos and a few TV shows with comparisons of the top 10 intakes on the market and on a engine dyno. Its hard to argue with dyno charts & graphs showing what each and every intake is willing to do no matter what brand its.
Edelbrock and others are a multi-million dollar corporation, not because their intakes are a waste of money, but for the over the top performance they offer.
Before I would believe a 16 yr GM veteran I would believe the YouTube videos and a few TV shows with comparisons of the top 10 intakes on the market and on a engine dyno. Its hard to argue with dyno charts & graphs showing what each and every intake is willing to do no matter what brand its.
Edelbrock and others are a multi-million dollar corporation, not because their intakes are a waste of money, but for the over the top performance they offer.
12-16-2018, 12:26 PM
#47
Le Mans Master
Only one I can find is not open bore which defeats the whole purpose, does it not?
https://www.holley.com/products/fuel.../parts/3712MRG
I know this was discussed in length before. Thanks again for your input and advice.
Edit: What headers did you use?
https://www.holley.com/products/fuel.../parts/3712MRG
I know this was discussed in length before. Thanks again for your input and advice.
Edit: What headers did you use?
XS Power.....1 7/8 LTH headers and had them ceramic coated locally even though Stainless Steel. Awesome performance...great bottom end with the AFR 180's and pulls very hard to 6,000 RPM. Did not notice any mid range torque decrease, at all.
12-16-2018, 12:31 PM
#48
Le Mans Master
jb78L.
Before I would believe a 16 yr GM veteran I would believe the YouTube videos and a few TV shows with comparisons of the top 10 intakes on the market and on a engine dyno. Its hard to argue with dyno charts & graphs showing what each and every intake is willing to do no matter what brand its.
Edelbrock and others are a multi-million dollar corporation, not because their intakes are a waste of money, but for the over the top performance they offer.
Before I would believe a 16 yr GM veteran I would believe the YouTube videos and a few TV shows with comparisons of the top 10 intakes on the market and on a engine dyno. Its hard to argue with dyno charts & graphs showing what each and every intake is willing to do no matter what brand its.
Edelbrock and others are a multi-million dollar corporation, not because their intakes are a waste of money, but for the over the top performance they offer.
Unless you are chasing every last Gross HP, the intake is a distance last upgrade by far...Spend your money, time and research on Cylinder Heads, Retro Roller cam, and exhaust...this is well know. Ignition component manufacturers spend millions on trying to convince folks about the HP increase in this arena as well.....its called marketing
Last edited by jb78L-82; 12-16-2018 at 12:38 PM.
12-16-2018, 12:43 PM
#49
Le Mans Master
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True. But most of the test mule engines are around 355 - 377 C.I.
5 horse is nothing. 10 horse is not much. But when you see gains of 15, 20, 25 horse from after-market intakes, then its worth the $250 to me and millions of others.
Its probably the worst bang for your buck, but still worthy.
5 horse is nothing. 10 horse is not much. But when you see gains of 15, 20, 25 horse from after-market intakes, then its worth the $250 to me and millions of others.
Its probably the worst bang for your buck, but still worthy.
Last edited by HeadsU.P.; 12-16-2018 at 02:48 PM.
12-16-2018, 12:59 PM
#50
12-16-2018, 01:17 PM
#51
Le Mans Master
12-16-2018, 01:18 PM
#52
Team Owner
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St. Jude Donor '05
I regret not getting the lifter bores done also, it makes a difference. Some get real wound up about solids...you dont have to adjust them all the time, just once (rollers). Use a good quality stud or shaft rockers, you wont have to tocuh them. I dont have many miles on mine but the ones it has are very hard and have yet to see anything move on lash. If you wind it up do it right and get a solid rather than hyd lobes that are too aggressive, or god forbid having a lifter do something goofy and tag a piston. Theres really nothing to fail on a solid
This car was daily driven for a long time, sitting in traffic, you name it no issues at all. Not like we drive these things 50k miles go for the gold! Cant beat the sound.
This car was daily driven for a long time, sitting in traffic, you name it no issues at all. Not like we drive these things 50k miles go for the gold! Cant beat the sound.
12-16-2018, 01:43 PM
#53
Team Owner
Thread Starter
Edelbrock Performer torque at 3000 rpm is within 2% of the Air Gap. 470 vs. 478.
Last edited by Capt. Shark; 12-16-2018 at 01:44 PM.
12-16-2018, 01:51 PM
#54
Race Director
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2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Exactly....AND this on a close to 500 Gross HP 406 SBC....Compare the Chevrolet ZZ4 crate intake to the other short/medium aftermarket intakes! THE DIFFERENCE IS 5-7 TQ/HP...give me a break! On a mild/moderate 383/355 there is zero chance of a 15-25 HP/TG peak/avg increase......ZERO! MARKETING HYPE!
JIM
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HeadsU.P. (12-16-2018)
12-16-2018, 02:19 PM
#56
Le Mans Master
Only one I can find is not open bore which defeats the whole purpose, does it not?
Once you get them modify them as you see fit to suit your purpose. I cut out the dividers on the secondary side and left the primary side dividers intact. In this way when the secondaries are opened up the intake volume "looks" bigger to the engine and can draw from a larger resevoir of air vs when only on the primaries. I tried many different configurations of intake gaskets, heights, cut outs etc and this one netted me the best response on the primaries with best performance with the secondaries. It looks like a cut down divider to the engine when on the secondaries and a split divider when only on the primaries.
You can also make gaskets out of plywood material of any thickness and design you desire. I have one of plywood that is 1/8" thick that is cut in the same manner and one that is completely open like this. Cut them out myself using gaskets as a guide.
https://shop.advanceautoparts.com/p/felpro-carburetor-mounting-gasket-60249/5182131-p?c3ch=PLA&c3nid=5182131-P&adtype=pla&gclid=CjwKCAiAjNjgBRAgEiwAG Llf2vDLPZrIQsT5Llqykwdn1y4E5B6EmrVtoVOVq LLaBSjMl9Q_HlKaXxoC1EIQAvD_BwE&gclsrc=aw .ds
Last edited by REELAV8R; 12-16-2018 at 02:22 PM.
12-16-2018, 03:14 PM
#57
Le Mans Master
Go look at that boat anchor l82 intake and a performer the only similarity is rhe distributor hole and it's aluminum.
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HeadsU.P. (12-16-2018)
12-16-2018, 03:48 PM
#58
Team Owner
Thread Starter
Next thread I start is gonna be BBQ pork pig. Which is better? Pulled or chopped?
