Re: S4 20v vs S2 10v

[zm@mhcnet.att.com (Zafer Mehmood [209])]

Dan Bocek wrote:

> Actually, this is called a compressor bypass valve, and you can get 'em 
> right from audi and upgrade a non-equiped car.  All it does is re-route the 
> air from the high pressure side of the turbo to the low pressure side 
> when it detects that there is a vacuum present in the manifold (i.e. 
> closed throttle conditions).  This prevents the backpressure wave that 
> happens in cars not so equipped, which has the effect of stalling the 
> compressor blades of the turbo, hence making it take longer for boost to 
> come on the next time you step on it.

Dan,
	Do you know if this compressor bypass valve from the S4 would
fit the 86-88 5000 Turbos? Would modifications be required? If you have
priced this valve from Audi and Sport Wheels, could you give the numbers
($ and part number if you know)?

TIA,

-Zafer