I've been doing plenty of research on upgrading my E-Force.

My current setup is:

CNC GMPP LS3 heads
LS9 Cam
EForce with 3.25" pulley
Upgraded Edelbrock Tensioner
Kooks Long Tube Headers
Z06 Fuel Pump
1000 CC Injectors
T56 Manual trans

Car is currently making 580 rwhp.

Car has ran a 12.3 @ 122 mph in the 1/4 on a set of 305/30/18 MT ET Street DRs.

I know - my time is terrible - but I'm working on it, lol.

I'm planning on swapping to the following this fall:

3" SC Pulley #15822
90mm ATI Idler Pulley #916208-76
Smaller Belt
ECS external pump
E85 Fuel
DSX Flex Fuel Sensor
Car is getting retuned.

I'm aiming for north of 600 wheel - and I think this setup should do it.

Question #1- what belt will I need with the 3" blower pulley - and the 90 mm idler pulley?

From the one thread that I saw a belt size - the poster said they needed a smaller belt.

Question #2 - This one might be stupid - but is the idler pulley on the E-Force bracket - and not the one between the crank pulley and Power Steering pump? I just want to make sure I'm swapping the correct one out, lol.

Thanks everyone!

 

So to ur first question. Yes u will hit that no problem, I'll have to check which pulley we used but with a slightly bigger cam, ls1 5.7l with 100k miles on the clock with ported heads which flow less than ls3 out of box or silar. I got 670rwhp and meth, no e85. U will have similar or better results with e85 and that blower.