C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

heads, what to do?

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Old Apr 16, 2012 | 07:56 PM
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Default heads, what to do?

hello everyone, just wanted to start off by saying this is my first post. I have been doing a lot of research on the forum since my dad sent me his 94 c4. He had the motor built by some guy in TX, it's a 396 with forged internals. everything is good on the bottom end, but he topped it off with the edelbrock performer lt1 heads(part # 61909), edelbrock intake(7107), and shorty hooker headers. I know this engine is choking up top, I have Exotic Muscle long tubes on the way, but what do I do about the heads? Everything I have read says I would be better off with ported stock heads. My question is should I spend the money on AFR's, Trickflows, or Advanced induction, or can the edelbrock heads be ported enough to flow like the AFR's, Trickflows,etc? Just want to say thanks for any input ahead of time. looking forward to what you guys think. I'll also be replacing the camshaft also.
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Old Apr 16, 2012 | 07:59 PM
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oh yeah, engine dynos 341hp and 374ft lbs tq at the rear wheels
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Old Apr 16, 2012 | 08:10 PM
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Personally, I would go with a 200-210cc intake port. Those heads you have aren't cutting it at all, especially with a 396. I'm sure people will also recommend going with a super ram or mini ram, or even the holley stealth ram for intake options.
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Old Apr 16, 2012 | 08:50 PM
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Is the edelbrock intake not worth porting then?
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Old Apr 16, 2012 | 09:36 PM
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You can port the edelbrock intake

Id sell the Edelbrock heads and get a real good head pass on the stock crap.
Most times they dont flow what "some" claim they do once they are done. Seen it too many times

To get them to start moving some air you start creating "dirty air" to get there. Just isnt worth it to anyone except the guy taking your money
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Old Apr 16, 2012 | 11:07 PM
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thanks cuisinartvette. what heads would you recommend?
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Old Apr 17, 2012 | 07:32 AM
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Originally Posted by lilrigg
thanks cuisinartvette. what heads would you recommend?
http://www.airflowresearch.com/index.php?cPath=27_57
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Old Apr 17, 2012 | 06:12 PM
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Black89z51, will these afr heads fit my edelbrock lt1 manifold?
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Old Apr 17, 2012 | 06:57 PM
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What are my old heads worth? (Edelbrock performer lt1's with ~40k)
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