Looking for some help...
Looking for some help... Ok I am lookin to put a ATI D1SC Twin Intercooler setup on my Vette. But I have an underdrive pulley, and I talked to a couple of guys that keep the U/D pulley on cause it will work w/ a vette. Just need help figuring out the boost level. The D1 has a 8lb pulley on it (don't know the dia.) and the U/D pulley of mine is 5.75 dia how many pounds of boost am I looking at? It's a 25% U/D so I figured 6-6.5 lbs of boost? Anyone help me out?
The underdrive pulley shouldnt do anything to your boost. the underdrive pulley is smaller in dia. so it slows down your accessories down. not your blower crank pulley. your blower crank pulley mounts over your your crank pulley and is held by a longer crank bolt. Call ATI for your best answer though.
Hope that helped.
Kyle
Hope that helped.
Kyle
i think on the vettes its all one belt ( serpentine belt drives accesories and blower). so it should affect boost.
just ditch the U/D pulley ,if you use it you'll loose power compared to not using it.
just ditch the U/D pulley ,if you use it you'll loose power compared to not using it.
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From: Forced Induction Heaven
Originally Posted by NA$TY-TA
The underdrive pulley shouldnt do anything to your boost. the underdrive pulley is smaller in dia. so it slows down your accessories down. not your blower crank pulley. your blower crank pulley mounts over your your crank pulley and is held by a longer crank bolt. Call ATI for your best answer though.
Hope that helped.
Kyle
Hope that helped.
Kyle
GWP (don't even start) was one of the first to switch to a larger crank pully...which in turn allowed for the use of a larger blower pully. What does it mean..it meant more surface area contact for the belts...especially on the Blower Unit..the tendancy was the smaller the blower pully the more it slipped, because the initial ATI design places both inboard and outboard idler pullies in such away that when using a small pully on the blower, the belt surface contact area is very small. It is best to go with a larger crank pully and larger blower pully. This way you have more contact all around...having a smaller U/D crank pully will require a smaller blower pully to get the same amount of boost....which means less surface area contact...which means more belt slippage.
A&A Corvettes makes and entire 8 rib system, with new relocated idler pullies and brackets...and you can get the kit for approx. $4900. That also includes a single I/C and and hard 3" plumbing..no funky Y pipes and twin I/C's. You won't be sorry C5kid, I had a ProCharger on my Vette over 1.5years ago...please benefit from those of us that have already beaten down this path, why others attempted to resolve the infinite problems that plagued the ATI kits for the C5's when they first came out. Andy has resolved these and has now what the ATI kit should have been when it was released.
PS
Don't forget some 4:10 gears.
