on an otherwise cam only LQ4, are the AFRs really worth the extra $1000?

 

anyone? id like to make 400 rwtq NA at 9.5:1 compression...and maybe go turbo down the road.

 

IMO yes...AFR has a great flowing head for mid lift ranges where it counts...To many people get caught up in .600 numbers and so forth...As far as making 400RWTQ with 9.5 to 1 compression I highly doubt it...That compression is lower than stock...
Have you thought about going with a higher compression for now, and then getting some dish pistons later on if you decide to go FI?..
You can find the 205's fully assembled for less than 2200...The last time I looked at the LS6 2.5's they were 1400...I am a little biased to AFR since thats what I am gunna go with, but either way, both heads are good...

Kev

 

umm if you have the money AFR.. no question. this shoulda been posted in the internal section btw.. ask a mod to move it over there. youll get more feedback over there

 

i see. well the 9.5 is stock compression on the 6.0, with 72cc heads. i wanted to keep it there for future turbo plans. i dont really want to go back through the motor later, its brand new now. i guess im just looking for the best value, not necessarilly the best all out numbers. its a daily driver truck. i think ill probably go for the PRC's, and maybe save the rest of the $$ for boltons. thanks for the input guys.