hey so im new here although i have been tunning sr20 cars for 10yrs now. my first being a 91 ser then a 91g20 5spd,93.5g20 5spd,96 g20 auto and back to square one with a 92 ser i got a few days ago. so my question is whats the diffrence? my 93 g20 had pulleys,headers,no cat,exhaust,advanced timming,jim wolf pop charger and i swear my "new" se-r could spank it & its all stock. is there a diffrence in the ecu? maybe gearing? why does the g20 top out at 120mph and my se-r reads 150 if they both rock the same sr20?