boost guage and valve
Thread Starter
Scooby Newbie
Joined: Apr 2005
Posts: 6
Likes: 0
From: doncaster
boost guage and valve
hello this is my first post on this site and it looks very informative if any body can shed some light on this situation below it would be most beneficial
also is their a scooby scene up in the north area as i cant find one im from doncaster in yorkshire ( gods county) pleeeeeeeaaaaaaase help the reason for this is my mates are not into cars at all
is their any one going to the doncaster custom motor show this saturday and sunday at doncaster we could meet up
can anyone tell me where to fit a boost valve on a 99 classic to up the boost a little and would it also be benefiacial to fit a boost guage as well
also has anyone got any pics on how to fit both parts and also how easy is it to do and can anyone provide me with a how to fit the boost valve and boost guage the car is a 99 uk spec wagon
Scooby Regular
Joined: Jan 2001
Posts: 6,812
Likes: 1
From: West Sussex
Welcome to Scoobynet 
On the inlet manifold there are quite a few pressure take offs. There may be a spare with a black rubber cover on (about 1/2" long).
Take a hose from this to your boost gauge
If you don't have a spare pipe, 'T' into the pipe that goes to the dump valve (it's mounted on the front of the intercooler)
As for the "boost valve" what make is it? Did it not come with instructions?
Is it a bleed valve?
I would sugest you fit the gauge first so you can see what effect the "boost valve" has.
As for meets, keep your eye on the Events forums
On the inlet manifold there are quite a few pressure take offs. There may be a spare with a black rubber cover on (about 1/2" long).
Take a hose from this to your boost gauge
If you don't have a spare pipe, 'T' into the pipe that goes to the dump valve (it's mounted on the front of the intercooler)
As for the "boost valve" what make is it? Did it not come with instructions?
Is it a bleed valve?
I would sugest you fit the gauge first so you can see what effect the "boost valve" has.
As for meets, keep your eye on the Events forums
Scooby Regular
Joined: Jan 2003
Posts: 3,190
Likes: 0
From: 535D M-Sport Touring
Do a search for Dawes device It's really the only type of boost valve suitable for a Scoob. Dead easy to fit. Ideally you should have a boost gauge so you know how much your increasing the boost by, also a air/fuel ratio guage to ensure it's not underfuelling at the higher boost setting and lastly I would consider a KnockLink essential to ensure that you are getting any engine destroying detonation.
Oh and turn the boost up too high and you will hit the ECU fuel cut, a safety mechanism in the ECU to prevent something like a stuck wastegate destroying the turbo/engine. If the boost goes above a preset level then the ECU will shut off the fuel supply to the engine, you will start to slow down rather rapidly until the boost drops off to a safe level. Think its around 1.1 - 1.15 BAR on a MY99.
It's really the only type of boost valve suitable for a Scoob. Dead easy to fit. Ideally you should have a boost gauge so you know how much your increasing the boost by, also a air/fuel ratio guage to ensure it's not underfuelling at the higher boost setting and lastly I would consider a KnockLink essential to ensure that you are getting any engine destroying detonation.Oh and turn the boost up too high and you will hit the ECU fuel cut, a safety mechanism in the ECU to prevent something like a stuck wastegate destroying the turbo/engine. If the boost goes above a preset level then the ECU will shut off the fuel supply to the engine, you will start to slow down rather rapidly until the boost drops off to a safe level. Think its around 1.1 - 1.15 BAR on a MY99.
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