quad

Have a built engine with forged pistons at 9.5.1, forged rods and currently running a 3.70 charger wheel maxing out a 9 psi and looking to change to a 3.4. I am currently running progressive alcohol injection my afr is mostly in the mid 10's currently at wot and the alcohol system is set at 4 about half and starts injection at 2.5 psi according to my guage. How much additional boost do you all think I will pick up going from a 3.7 to a 3.4 and any other thoughts you all may have?

EPP

iTrader: (22)

You will probably pick up 2 to 3 psi of boost, but you may run into belt slippage problems. APS makes a larger crank pulley for the GTO kit so that you don't have to go so small on the blower pulley. Bob

Hada68GTO

ECS East Coast Superchargers makes a nice 8 inch crank pulley. Believe it sells for around $500.

BigRich954RR

iTrader: (1)

What the part number for this? What size is it ? does it just bolt on or do you need to move stuff around?

EPP

iTrader: (22)

ECS uses a harmonic balancer made by Innovators West for the Corvettes, where the blower is run off of the accessory pulley on the Corvettes. The ProCharger GTO kit bolts a blower pulley to the outside of the balancer, just like their f body kits. To my knowledge Innovators West does not make an oversize blower pulley for the ProCharger GTO kit. Bob

EPP

iTrader: (22)

I don't have a part number, but tell them you want a pulley identical to the one they sold Ron Sutherland from California. Bob