i dunno but it sounds like it could be becuz of da masd ignition,from wat i know it's suppose 2 b giving more quicker n powerful sparks, only i can think of is that its not setup 2 match ur timing, it mayb b 2 advance or 2 retarded..advance timing gives lower rpm torque n retarted timing gives higher rpm torque...u might have 2 retard or advance ur spark timing...if u do it do it in lil increments at a time n test it out...