5000 RPM drop ????????
i will change the Valve Spring and all the electronic parts ( cam Sensor , crank sensor , map , maf , ecm ) , fuel pump pressure 58 psi AFR 12.8 .
i need
Advice
ive heard of people doing that to insure themselves a little with warranty on a motor they just sold and tuned to avoid it coming back broke the next day.
but... i would think he might have told you about it, lol.



