mk4jetta

What is the stock boost in a UrS4?

I have been getting 15 psi, then the other day after i changed my valve cover gasket and cleaned out the pool of oil in my cylinder 3 spark plug hole, and played around with some hose connections, I was getting 17 psi once in a while, or 2.2 bar is what the dash at the most.

speedtek

Around the 15 psi mark for the overboost which tapers down to as the rpm's climb. Nominal boost is probably around the 10 to 12 mark for stock (at least that's what I've observed on my 97).

UrS4boy

A bit higher. Stock over boost = 2.1 to 2.2 Bar absolute (about 16 to 17 psi relative).

mk4jetta

then i probably have a slight boost leak

speedtek

Then I'm definitely not getting my money's worth on this 034 stage 1 setup. I'm only seeing 17 to 18 on the overboost. I'm going to crank down my spring or swap in that 1.9 BAR unit. I have a feeling it's my WG spring causing me to be so much lower than advertised. Think I'd see any benifit from tossing on the 034 diverter valve as well? (I have one in my trunk)

Renaissance

The DV would be a easy and painless place to start. If your current valve is "sticking" or malfunctioning then you may be bleeding off some boost while on throttle. This has happened to me as well.