PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Tune Required

Old May 6, 2009 | 07:03 PM
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Default Tune Required

I know this is a widely subjective question but if I can get some opinions it will help me greatly. I am currently in the process of converting a N/A solid roller 418 motor to FI.

A little background the previous heads were GTP Stage III LS6 heads and 248/647 114 Solid Roller Cam making approx 11.2:1 compression on 93. The motor made 505rwhp/471rwtq. I am swapping for Patriot Stage III LQ9 heads and the following FI comp cam.

Cam specs are:

Dur @ .050 232 int 240 exh

Lift .595 int .608 exh

I plan on running at least 14# of boost max of 16# once the procharger is on. Now I know a tune is required once I get the blower installed but for just the cam and heads how bad off will I be. Is it a must or can I get by just to start the motor and light driving this is not a daily driver. I don't want to do any damage. I am planning on 9.5:1 to 10:1 compression after the new heads and cam. I also recognize the substantial power loss I will probably get swapping all of this stuff but I'm setting myself up for some decent boost.
Thanks

Last edited by laughatrice; May 6, 2009 at 07:12 PM.
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