Punisher_ws7

iTrader: (6)

i need to find this formula. i have a F1a with a 5:40:1 step up ratio with a 3.7 blower pulley, and a 7.25 crank pulley spinning it to 7k... i also have a 402.. looking for what boost and what RPM the blower is spinning.. Thanks

ive looked for 2 hrs

5w20

iTrader: (21)

I believe it's;

(crank pulley size/blower pulley size) * blower internal gearing * RPM

(7.25/3.7) * 5.4 * 7000 = 74,067.56756756757