belt size for a 2.3 whipple with 2.75 pulley and 4lb lower

[Shopboy]

Ima get my car tune tomorrow has a 2.3 whipple with a 4lb lower n Ima put a 2.75 pulley for my race tune anyone know what's size belt I need n how much boost and power Ima make?but most important need to know what belt do I need

 

[Shopboy]

Anyone

 

[Danno44]

Which generation whipple?

 

[Shopboy]

Second

 

[TRBO VNM]

Belt Selection Guide

 

[Danno44]

That setup should make around 25lbs. Theres a belt guide on here that should give you an idea on the size you need. On my first generation whipple my belt is a Gates K080790 That is to run a 2.75 upper with 4 lbs lower with a snub idler. I believe it is 78 inches. What fuel you planning to run with how much timing then we can guess the power you should make?

 

[Lstruck03]

i run that setup also, and with a 3.2" alt pulley, 100mm aux idler and 3 90mm idlers I run a 79.7" belt. Its TIGHT but works great.

I also have the 2.75" pulely for sale. Its RR and harely used. pm me if interested. ill sell with or without the belt.

 

[New Edge]

Holy moly 25 psi on a 2.3? Jesus...

 

[Lstruck03]

not quite.. it peaked 22 on average. 23 on cold night. would hold about 20.5 to redline

 

[Shopboy]

Street tune 16psi with a 3.25 upper n a 2lb lower make 597hp 544torque on 91 race tune 21.5psi on a 2.75 upper and 2lb lower 638hp 615torque on 109

 

[sn94cobra]

My 2.3 with 2.75 made about 21-22 lbs on stock lower
I hit around 670 rep on mine