Re: Saab (Bosch) valves

["Graydon D. Stuckey" <graydon@apollo.gmi.edu>]

On Wed, 9 Apr 1997, Phil Coppin wrote:

> FYI,
> Toyota Mk3 Supra Turbo owners who have chip and/or boost upgrades are 
> changing the standard Toyota BOV's to Saab (read Bosch) BOV's when 
> working with extra boost. Did this to mine and now can play tunes when 
> boost gauge shows neg/pos crossover (0 psi) (diaphragm oscillation 
> sounds like a trumpet!). Stock is 6.7psi, I am running 13.6.

I looked at that Bosch bypass valve at the Saab dealer last year.   It 
was awefully tiny.   I didn't think it would help enough to be worth the 
effort.   OTOH, a bypass valve from HKS, TRUST, or one of those other 
Japanese tuning firms is very serious.  Those things can flow some 
serious air!  They also suck some serous $$$ though  :-)

Later,
Graydon D. Stuckey 
'86 5KCSTQ, GDSstageIII
"No, its our family car."