Quote:
Originally Posted by cjperformance
Thanks to both danhr and JP374! Great info! Looks like I have the 7.65 lower, so seems to me like the 3.7" is the right choice for what I want.
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What upper do you have now?
I would honestly start with putting an ATI underwrite pulley on, and a 8.25 lower.
Increasing pulley size on either upper or lower will increase your contact patch, and have less of a chance for belt slip.
Naturally going down in size increases your risk of belt slip.
Typically belts start to slip in the 3.5- 3.7 range.
Also you get to have better dampening and the underwrite pulley frees up some cheap horsepower as well.