2002 z06 car made 505/466. Its a TSP 427 ls3,callies crank,callies rods ,weisco pistons, PRC stg 3 ls6 heads,TSP ls7s 242/250 .650/.650, kooks 1 7/8, kooks off road x pipe,.......Car still has factory ls6 intake, throttle body and ti catback.....Car drives great and has PLENTY of power.(not sure if I even want to mess with it) Wondering how much power I am leaving out there (est.)? Also what catback are most people running? Thanks
__________________ 1999 Pontiac T/A old 346 H/C th350 moser 9"
new sdpc 402 iron l92/l76
The factory titanium catback is the best bang for the buck. I tested it verses an open exhaust and only lost 3hp. Keep it. As mentioned above, the heads, camshaft, intake, and TB are probably the power restriction at this point. If you don't want to change heads and/or camshaft at this time, at least go with a ported GM LS7 intake or FAST and at least a 90mm TB. I used to run a camshaft that was very close to the specs that you listed. I replaced it with a custom grind from my engine builder and changed nothing else, and picked up 40 hp and 40tq across the rpm range. Also, make sure that your tune is good. To answer your question as to how much power you are leaving on the table; probably 90hp and 60tq judging from the 427 that I used to have. However, you will spend quite a bit of money to add this much power to your engine. I would just change the intake and TB and see if you want to go further.
Sounds like a very mild build indeed for the cubes.
Cam, heads, intake/TB.
However, comes down to the driveability factor. If you like what you have now, why risk driveability? Definitely intake/tb could gain some power and not sacrifice that. A lot of it is in the tune as well
__________________ 2013 SGM Mustang GT A6 - 3 mod 5.Bro, so naturally in single digits club now.
Hammer admitted 5.Bros are 12 second cars stock!
Originally Posted by big hammer
WhiskeyMarc is in the 12 second class? He must be bone stock
A friend of mine (FastorangeZ) had a near identical setup on his '01ZO6 as you have now. Changed to cnc'd LS7 heads with a ported LS7 intake with 90mm TB. Made 540rwhp through the Ti and 572rwhp with the cutouts open. The Ti is a good system but after 500hp, it starts to choke. So to answer your question, you have a considerable amount of power left on the table.