[ZEDL1]

Originally Posted by Stephen12ZL1

as a "stand alone" mod it is ok but you might as well do at the very least a cold air induction and throttle body because a tune is required for the larger ringed pullies(9.1 or larger). From the screwy things the computer tries to adjust in the fueling and MAF, I believe for the most security and highest hp increases...get a pro to dyno tune after these mods. 9.55 pulley ring on a lower only will produce 13 psi boost vs 8.6 stock....so a 4psi difference. My bet is 50hp/tq with pulley only and much greater with mods that complement the pulley. Jannetty has a "no tune" pulley swap setup with a smaller ring and rotofab air intake which can be good for 75ish hp/tq for little effort.

Thank you for your help.