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I'll gladly take more than 600rwhp. If I can get there via boost only, I would be happy as long as I am not at the edge reliability.
If the boost gets me 30rwhp more, I want 30 more. If the LS9 cam can get me there, great.
If the LS9 cam can only get me 10-20rwhp over the LS3 cam, I obviously need to weigh the cost of the install against a better cam except what is a better cam going to net in HP?
I'm shooting for 600rwhp. I'm at 539/527 with the 599 eforce kit and Pfadt headers. I'm going to swap out the 3.5" pulley for a 3" one plus larger injectors. If I can get 60rwhp more with greater boost, I won't do the cam. If I'm short, I want to do a cam.
The question is, how much labor? My dealer is installing the parts. I did not yet ask about a cam. If this cam gets me 20rwhp with <8 hours labor, I may consider it.
I wouldn't use anything smaller than a 3.25" pulley on a stock motor. With a 3" pulley, your boost would probably be over 13psi. Probably need meth to run much timing. The 3.25 with a mild cam should hit your numbers fairly easily, assuming M6 tranny. I'm running a 3.3" on a Maggie TVS 2300 with mild cam and bolt ons. It does 650ish rwhp on about 9.25psi. That's LS3 motor with M6 tranny. If you're A6, you'll need a bigger cam or a very friendly dyno to hit your numbers.