[Biturbos4] testing the turbo bypass valve(s)

[j y]

how well do the TT replacements work on chipped cars?
I have stratmosphere DVs - there is a noticeable difference btw them & stock - holding boost. I notice this on both my S4 and Porsche 951 (944 turbo). Both cars are chipped.


"Witte, Michael J (HPFS)" <michael.witte at hp.com> wrote:
or just get the TT replacements, IIRC the 710's, IMHO, not worth it paying $150 more for Aftermarket ones...

-----Original Message-----
From: biturbos4-bounces at www.audifans.com
[mailto:biturbos4-bounces at www.audifans.com]On Behalf Of j y
Sent: Wednesday, March 10, 2004 11:36 PM
To: David Kavanagh; Bi-Turbo Audi S4 Audi Fan Group
Subject: Re: [Biturbos4] testing the turbo bypass valve(s)


bad bypass valves can cause turbo overspin.
if you plan on chipping the car - get "aftermkt" bypass valves - forge, bailey, etc..


David Kavanagh wrote:
What's the proper procedure for testing the bypass valves? Looks like 
mine are stock (and original judging by the "use-once" hose clamps). 
Would failure symptoms be obvious when driving the car? I understand 
they could fail where the don't fully close. Could they be the source of 
an intake leak?

David


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