GTM Stage 1.5 s.c. tune issue

kentmo280z · 03-27-2017, 12:13 PM

Quote:

Originally Posted by Chuck33079

I'm not sure how exactly that would make more torque. If it's the same size pulley but lighter, I would think the only difference would be on initial throttle tip-in. If it's larger, wouldn't it spin the sc less? Wouldn't it need to be a smaller pulley to spin it faster?

I just found this from 1 Slowz "the factory crank pulley is 146mm

SO an 88mm pulley would be 146/88 x 7500 x 7.5 = 93324rpm "

So a larger crank pulley appears to make the s.c. spin faster.
A) My setup 90mm pulley w/ stock crank 146 mm pulley -146/90 x 7500 rpm x 7.5 ( SC gear ratio) =91,250 rpms
B) Using a 150mm crank pulley, 90mm s.c pulley 150/90 x 7500 x 7.5 = 93,375 .
This is if my formula is correct???

THINK I'LL DISREGARD THE CRANK PULLEY IDEA.... DON'T EVEN KNOW IF DIFFERENT SIZES ARE AVAILABLE..

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