[Biturbos4] Alternative Boost Gauge Tap-in Location

Quincy Chiang b5quattro at shaw.ca
Mon Jul 11 10:08:51 EDT 2005

So you're saying this isn't the ideal location either due to the fail-safe mechanism this line is tied into.  Are you planning on finding a better location?  I wonder if a leak does occur to the boost gauge vaccum line, which tap in locatoin would be worse, the one I have right now (to fuel pressure regulator) or yours (to N249).


----- Original Message -----
From: j y <jimnetpa at yahoo.com>
Date: Sunday, July 10, 2005 1:26 am
Subject: Re: [Biturbos4] Alternative Boost Gauge Tap-in Location

> I've tapped into manifold pressure before & after the N249 (DV 
> control valve). It requires re-plumbing the existing hoses - 
> fairly time consuming process. Because the hoses are not long in 
> length and need to be spliced and replaced with new vacuum line 
> and a tee (to hook up to your AWE gauge). It worked for me when I 
> disconnected the N249 to get better DV response at part throttle. 
> Only problem - the N249 is on of the ECU's fail-safe mechanisms to 
> reduce turbo failure (allows the ECU to manipulate the DVs in the 
> case of a major boost leak) - just like "limp mode". Good luck.
> Quincy Chiang <b5quattro at shaw.ca> wrote:
> Hi everyone,
> I need to replace the vacuum line on my AWE boost gauge, and I 
> want to change the tap in location from the fuel pressure 
> regulator to the intake manifold pressure. This is because a leak 
> at the existing tap in point can cause the car to run lean, not a 
> good thing at all. So my question is where is the intake manifold 
> pressure line? Thanks for any help!!
> Quincy
> '01.5 S4
> '90 CoupeQ
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