Need more power, upgrading cylinder heads, Brand?????
 

I am currently running stock LT1 heads with GM LT4 hotcam spings, retainers, 1.6 roller rockers and and a heavy duty roller timing chain set. I have the hotcam also installed 525 lift 218 duration and i am wanting to bring out the most in my cam and upgrades by installing heads. If anyone has any head suggestions ie. brand or port work please let me know. I have had the car on a chasis dyno numerous times for programing etc. So far i have managed to get 297 RWHP which i figure is between 365-375 hp off the flywheel. The altitude here in Edmonton is 2240ft. I want to reach approx 425hp at the flywheel and im hoping upgrading my heads will do the trick. If anyone has any suggestions for cylinder heads please respond. thankyou

Curtis

As well as the cam and rockers, i have upgraded the exhaust added SLP headers, Flowmaster 3" catback exhaust, removed my catalytic converters, moroso custom c/a intake, TBI foil and added every other bolt on imaginable.

The factory aluminum GM LT-4 heads with your hot cam,and 1.6 rockers and the needed matching intake and such will get you to the 425 HP mark @ the flywheel by most all accounts.

And scoggin-dickey offers a CNC ported version for just a little more punch.

But the best of the bunch is likely the AFR LT-1/LT-4 heads,real nice,and tons more potential beyond the others.

Many will likely say to move beyond the "hot" cam,and if your really looking for the max you probably will need to,but for the goal you mention it will do the job.

And remember the other mods you made all help make this work better,good exhaust,proper fuel system,and the like do help quite a bit too.

Head experts.

http://www.cfmperformance.com/

In Canada - http://www.tkrace.com/

Spend a little time here - http://www.pcmforless.com/ - has a forum.

Can you site any sources that back that up? I'm not trying to be a smart ass or anything, I am curious because I cannot find anything that indicates any of the aftermarket LT1/4 heads are better than the factory castings. I'm beginning the process of upgrading my LT4 and can't find any information other than flow numbers. From what I've seen on flow numbers, the factory LT4 castings can easily match ported AFR LT4's. Maybe I'm not looking in the right place? Thanks for the help.

thanks
 

thanks for all the links and info guys, ill read more into the afr heads, just beacause of there versatility for upgrading in the future. I will also check all the other suggestions and ill keep eveyone posted with my choice and results. thankyou

save your money on the afr heads,for what you are lookin for Ported stock casting will get you there.Do a search on www.camaroz28.com for lloyd elliot www.eportworks.com.

eportworks
 

Purplefcar, another vote for eportworks. He ported my lt1 casting and I couldn't be happier. Really woke up my very sleepy lt1, car runs like a scalded dog. I made 384 rwhp with heads, cam, headers, and injectors. That was on a mail order tune on a 100 degree day. I have since then done more tunning and went to an electric wp. With me driving (not good) and its a loaded T/A with a 6 speed I still managed 8.0's in the 1/8th and 12.5's in the 1/4. Not bad for the money in upgrades. I plan to have him port some pontiac d ports in the near future.