Chicago Crew UnderBoss

iTrader: (1)

Title says it all. If i were to keep either my stock lS6 cam or heads in my future forged 347 LS6 motor running 14 lbs of boost with my D1SC in my 02 Z06, will i pick up more power throughout the entire rpm band by swapping out my heads (and keeping stock cam) or swapping out cam (and keeping stock Z06 heads)?

I know swapping out both would yield the most power but if you were going to only swap one out, which will get me down the 1320 (1/4 miles) quicker?

Full-Force

iTrader: (11)

Im gonna say the cam for sure. Since you are forced induction you dont have to rely on the heads as much in terms of velocity but with a bigger cam you can really fill that cylinder with alot more air if the valves stay open longer. I would also stay with a 114 or higher lsa. Dont want to bleed off any of that boost.

PREDATOR-Z

From the cam. But that is relative to a certain degree by which a set of heads (still small in ports), but ported will benefit as well.
AFR 205's for exemple

cantdrv65

iTrader: (3)

Anything that helps airflow is going to make more power...It works the same way as an NA setup except the proper cam for you will be quite different and will affect your power much more than the heads.

Chicago Crew UnderBoss

iTrader: (1)

YEAH, this is what i figured also and that the question that i would benefit more power wise from a nice blower cam was a no brainer vs. my stock LS6 heads (just as it would in a N/A application), which already flow (LS6 heads) pretty darn good from GM, and are not as important in a Blown D1SC application.

That being said, several other guys said the exact oppossite thing last week and that the HEADS would yield more power so just doing a little more double checking b/f i conclude my research on the issue set forth in this post and before i order my blower cam 224/230, 114 lsa (+0 advance), .581 lift i am thinking!

By the way, what to you guys think about that cam running 12 to 14lbs of boost on my D1SC powered LS6 motor with stock heads and dual valve springs of course!

algws6

iTrader: (3)

what happen, i thought you were going to leave this one stock? j/k, i said the same thing when i bought mine.

Full-Force

iTrader: (11)

If LS1's had crappy heads I might would say heads but I have seen LS1's pick up 70hp with a cam and tuning naturally aspirated so I would say the heads are pretty good.