i have the M90 overdriven 250%(2 1/2 times crank speed)and on my 277 cu in it will make 8.5lb's of boost(aluminuim head,big cam etc)combined with 9.5:1 compression ratio(105 octane propane fuelled)makes heaps of power and is still very streetable.i would like a 112 eaton, but more boost without lowering the comp ratio is out of the question.at the moment 0-60 mph comes up(in first gear-904 torque flite)less than 5 sec(pure street rod)and to be honest if i had more HP i wouldn't drive it any faster(scares the hell out of me when the wheels brake loose!)
