Standard ECU boost

[shark_90]

I've just been out for a good thrash in the Avant. Totally stunned by it's capabilities once again and I'm really getting to know how to drive it

Looking at the boost gauge, when at WOT it's usually reading around 0.8 - 0.9 bar which I understand is a little low. It sometimes boosts up to around 1 bar but not often.

I've seen the words "mechanical boost" and "0.8 bar" bandied around, along with "overboost" and "1.2 bar".

From my understanding the car should boost at 0.8 bar no matter what, and the ECU should make it boost higher, due to the stiffness of a spring somewhere

The only time I see any higher boost is if I stick it in 6th at around 60mph (approx 2,000rpm) and mash the throttle. Then it seems to boost really high peaking at around 1.4 bar. But that's only when the car's really really trying to pull - in a normal boost situation it's still between 0.8 and 1 bar tops.

I want to get Homefried but obviously I want to be tip-top first. Is my car boosting too low or is it correct?

[S2central.net]

Mechanical boost should be approx 0.4 bar on a standard car with unadulterated WG.
Easy way to check... unplug the connector on the WGFV and go for a drive... You should see max boost of 0.4bar in any gear all the way to redline.

S2central.net gives you info on the stock boost profile... SOunds like you either have a tweaked WG and/or a modified ECU. Bit concerned you only get that 1.4bar overboost in 6th though and you should be seeing higher max boost in other gears. Factory overboost is about 1.1-1.2bar (plus temperature variables) in 4th or higher in a rapid WOT situation.

Paul