need bypass valve for my 1.8, which should i get and from where

Reply Subscribe

Thread Tools

Search this Thread

04-01-2001, 06:50 AM

studlee

AudiWorld Senior Member

Thread Starter

Join Date: Jan 2001

Posts: 905

Likes: 0

Received 0 Likes on 0 Posts

need bypass valve for my 1.8, which should i get and from where

Reply Like

04-01-2001, 07:08 AM

TimA4

New Member

Join Date: Oct 2000

Posts: 307

Likes: 0

Received 0 Likes on 0 Posts

Bailey valve from AWE Tuning or Forge from Stratmosphere. Both good, similar prices.

Reply Like

04-01-2001, 12:44 PM

studlee

AudiWorld Senior Member

Thread Starter

Join Date: Jan 2001

Posts: 905

Likes: 0

Received 0 Likes on 0 Posts

will the porsche 993tt bypass valve from bosch hold up with 1 bar 1.8t?

Reply Like

04-01-2001, 06:29 PM

nick n

AudiWorld Super User

Join Date: Mar 2000

Posts: 5,617

Likes: 0

Received 0 Likes on 0 Posts

Reply Like

04-01-2001, 11:01 PM

studlee

AudiWorld Senior Member

Thread Starter

Join Date: Jan 2001

Posts: 905

Likes: 0

Received 0 Likes on 0 Posts

how about s4 bypass valve...can this withstand a 1.8t 1 bar chip??

Reply Like

04-02-2001, 02:10 PM

nick n

AudiWorld Super User

Join Date: Mar 2000

Posts: 5,617

Likes: 0

Received 0 Likes on 0 Posts

They're the same..

internally, a good amount of them are. What weakens is the spring and/or the diaphram will tear and you'll loose boost pressure. Stock BPV's hold fairly .7-.9 (A4/S4/993tt/seat; etc) psi but even under hard street driving in totally stock form, they will wear out sooner, naturally. If you do alot of throttle rolling into and out of WOT you will notice some power losses. I used to consistantly flicker (boost guage) between 8-10 and 10-12 psi after I chipped. Even with the 'aftermarket' one I have now I get slight flickering on occcasions.

Reply Like