Ive got a stock lt4 short block with 33,000 miles on it I have afr lt1 190's on it a gm 847 cam 1.5 rr, hooker longtubes, trual duals, ported intake, 58mmtb,
255gph fuel pump, 6 speed,centerforce,4.10 gears and a really good tune p.s. (thanks Tony Bishop). the car runs strong it will spin 3rd really good now I have beaten a few good cars one in paticular a supercharged 04 gt kid says it put down 575rwhp Yeah right. car was a 6 speed as well beat him from a 45mph roll and dead stop twice, also I killed a 6.0 GTO from a roll but I expected that and that was befor the 4.10 gears broke the 3.73 on the third roll from 45mph. Ive heard the car should make 400rwhp, but some people say that im grabbing for straws. im lucky if it makes 380rwhp, but ive seen cars on a dyno put 380rwhp with ported lt1 heads and a 305 cam. anyones opinion would be greatly appreciated. sorry have not had time to get to the track. P.S. the afr are 52cc

 

Get it to the dyno and see.

 

ttt

 

Probably around 420whp? I put down 430 with LT1 castings but Lloyd the man did the port work himself and Bret Bauer set me up with a custom cam.

 

I have yet to see anyone have good results with the smaller AFRs. Even considering the M6 I say the guys telling you 380 is reaching are right.

IMO AFR earned their reputation when the OEMs all had crappy heads and it was easy to improve on them, since then they have mostly just ridden that wave, I really don't see that wonderful a results coming from them these days unless the person spends another grand or two on having them reworked at which point there are a lot of heads that could do just as well anyway stock castings for one.

 

I wasnt all that happy with my 190's. I sent them to Lloyd and he worked his magic. I should have numbers in the next 3 weeks.

 

i called tpis because they sell lt1 casting heads fully ported and talked to nick agastino and tpis said that they have done alot of research in porting lt1 casting and that they could not get them close to what afr says they get out the 190's my buddy has loyd elliot heads lt1 castings and the flow numbers sent were close but not as much at peak but every where else like .300 to .600 they were not even close Just the peak was close not to say loyd does a bad job cause they still are great heads but if anyone is saying that thier lt1 castings are flowing more they are crazy cause im looking at the numbers and peak close very close but everywhere else thier way off.

P.s. i should mention that i have the cnc'd comp port package so they are not just plain 190's

And I would like to see what loyld does to your heads cause im thinking of stroking and would like to send my heads to him if I do