Join Date: Apr 2003
Location: Calgary, Alberta, Canada
Just as a point of reference, the motor (factory 302) in my 89 LX has 190k km's on it and I was getting valve float above 5000 rpm at 5.5 psi with a Hellion kit and 62mm turbo. That's with the stock springs on stock heads. Admittedly my valve train is tired and has seen a lot of mileage but if the springs are tired more boost may not equate to more power.
Hellion Heat 61mm turbo, 47lb/hr injectors, Aeromotive 305lph fuel pump, MSPNP2, Astro A5, stock 302 from throttle body to oil pan.