Turbo Boost

[Polish]

What boost should i be getting fro a 3b s2 it has been re mapped????

[vertigone]

Remap stage ??

Standart stage 1 would give you something like :

1.5b overboost @ 3000rpm
stable 0.9 - 1bar to red line

[Polish]

im getting about 0.3 so problem me thinks

[terrybullwon]

Chipped 3B, mine used to do 22-23psi

[Polish]

uuuuuuuuummmmmmmmmmm

[HPmuirt]

Remap stage ??

Standart stage 1 would give you something like :

1.5b overboost @ 3000rpm
stable 0.9 - 1bar to red line

A 3B doesn't have the overboost option and stock it makes around 0.85bar of boost and cannot go higher than 1bar as it has a 2bar MAP sensor fitted.

I thought most so called "stage 1" chips would make around 1.3bar max on a 3B

If it has had a 2.5bar map sensor then you can get 1.5bar max boost (dropping to 0.8-0.9bar at redline) but anything around that or above that will shorten the life of the turbo, particularly with a stock exhaust system.

Cheers n

Si

[Polish]

thanks so why am i only getting about 0.2 it has no cats full scorpian apart from the remap it is standard only had it back a day after going in for poor runing put a new lamba on it which cured that but very poor boost and dont know why

[prj]

You probably have a massive boost leak somewhere, N75 disconnected or your ECU is in limp mode.

[HPmuirt]

Limp mode and N75 disconnected should both give you 0.4bar max boost so as Prj says, probably a mahoosive boost leak - and to be that bad it is more than just a jubilee clip that needs tightening so I would check for a split hose of leaking IC.

Cheers n

Si

[Polish]

What is the n75? how would i know it is in limp mode? what is the best way to test for boost leak? would you hear it

[prj]

N75 - search this forum.
To check for limp mode - you need to pull the error codes off the ECU.
To check for boost leak - you need to pressurize your intake, search this forum.

[Polish]

thank you

[audi4fun]

could not find better thread...

I need your advice how to connect small boost pipe/hose (which is connected to ECU) to this VDO turbo gauge...Sizes are completely different as you can virtually imagine... inside diameter of the hose/pipe around 2-3mm, inside diameter of VDO flange around 1-1,5cm.

What parts do I miss? Any picture available?

Looking forward to receive your support!

[DJones]

The bronze part in the picture looks threaded, if so you need a push fit bayonet fitting that has a collar that screws down on the bronze thread.

The end result is much reduced fitting that you can push your pipe on to..

[UrS4boy]

N75 Info

What is the n75? how would i know it is in limp mode? what is the best way to test for boost leak? would you hear it

This is mostly for the AAN (and ABY) but should also work for the 3B:

http://forums.quattroworld.com/s4s6/msgs/20987.phtml which has this and more: