Which ones do you think would be better... Dart LT1 heads, Edelbrock LT1 heads, or LT4 heads... I am not asking which one would give the most bang for my buck...what i am asking is which one do you think would make more power...porting included...and they are all sround the same price anyway...
Thanks!

 

Darts - the LT1 4thgen crowd seems to love those heads. The LT4 heads are better than stock LT1 heads, but not by a huge amount. Ported LT1 heads can flow better than the stock LT4s. The Edelbrocks are somewhere between the stock LT1 and stock LT4 heads. Darts are best choice by a mile.

You do know AFR also makes LT1/LT4 heads as well right? They are probably better than any of the ones you asked about.

 

Yes i know of the AFR LT1 heads...I know they are a better head than any of the ones i asked about...now that i think about it...they are not that much more expensive for a pair... and 280cfm sounds lovely... but i did read somewhere that most aftermarket LT heads are just reworked produsction heads... are afrs their own, or just modified production heads? Because if they are production heads, i should be able to get the same performance for less right?
Thanks!

 

I love dart heads, and edelbrock, both are good quality and good heads.....But like said before AFR all the way, and if u think about it all performance heads are just "tweaks" of the stock ones, but some pretty major tweaks, u cant completely re invent the wheel or else everything wouldnt bolt up....but no matter what a good set of edelbrock, dart, or AFRs will out perform even the best ported and polished stock lt1 or lt4 heads.....money no problem AFR.....

 

http://www.airflowresearch.com/227sbc_lt4.php 320cfm.....thats no reworked production head lol.....

but if you do decide to go with some ported heads check in to http://www.eportworks.com/ me and a buddy sold him a set of stock lt1 head cores, we took them to his shop, saw his bad *** 4th gen, and he showed us around his shop, he does good quality work, fair prices, and hes real knowledgeable....

 

Thats just what i read, but...the 227cc intake port would be a little too big for a 350, wouldnt it...i still want it to be streetable and stuff...plus i dont think i will put a cam THAT big to get to .7" lift...i am looking at the 195cc head... that one looks pretty good for what i want... i also read from somewhere that i could get 320cfm out of the darts...think its possible?
Thanks.

 

yeah those 227 are not street heads, u can probably get that outta the darts but on the hight end at like .7 since urs is a street build lean twords the head with the better average flow over all points rather then the peak, u seem to be on the right track and not some dome guy that just thinks bigger is better.....

 

Most aftermarket heads aren't just ported factory heads, I think you misunderstood.... what was probably said was that most aftermarket LT1 heads are a modified version of the same company's SBC heads, as it only takes a few minor modifications for one to work on the other. Either way, its only partially true anyway.

My 2 cents - Go for the AFR 195cc 100% CNC ported heads, they kick all kinds of a*s. Second choice would be the Dart 200cc heads.

I heard TrickFlow also makes LT1 heads, and they have a pretty good reputation for good stuff, but I've never dealt with TrickFlow stuff myself or know much about it, so I can't say.

 

i do like those afr heads... how much hp do you think those would make with a lightweight bottom end and a cam like say xfi268...my goal is near 500 hp... also what intake would be good? i heard the edelbrock intake is no good...
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i do like those afr heads... how much hp do you think those would make with a lightweight fully balanced bottom end and a cam like say xfi268...my goal is near 500 hp... also what intake would be good? i heard the edelbrock intake is no good...

 

Actually, with just some mild port and plenum cleanup, the LT1 intake will support 500hp pretty easily. The LT1 manifold breathes really really well even stock. Nothing at all like the TPI manifold. Just cleanup and use the GM intake. The only reason the Edelbrock manifold is "no good" is just because its not any better than the GM intake - infact, its almost identical. Its a waste of money if you already have the stock GM intake.

If you want to check out alot of proven LT1 combos, and probably more knowledgeable people (as far as the LT1 goes, this place is pretty limitted) check out www.camaroz28.com . Its primarily 4thgen owners there, most with LT1s. Theres alot of buildup info, etc over there.