FastCarFanBoy
Well-Known Member
Stage 2 Gen1 crank pulley is 7.65"Built motor with MMR 1000 Short Block L&M intake cams and Boss heads
According to the procharger blower RPM calculator, With the stage 2 8" crank pulley and 4" supercharger pulley shifting at 7500 rpm gives you 61500 blower rpm.
https://www.procharger.com/calculators
You can run the 3.85 safely and smaller if you got big huevos.
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