slugo10

Took it to the Audi dealer and they found a blown vac. line somewhere. He hooked it up to vag and says it is peaking at 2.2 bar like 31ish psi. Is this possible? I didn't think the ko3 could do that kind of psi. I am thinking if it is this can't last long correct?

eSc4pe aka OxygenA4

you're only doing 1.2 bar, since normal atmospheric presure is 1 bar.

btw, The vag cant read past 1.5 bar.

fourwheelslide

...For example...I'm peaking at 2380 mbar, and at idle VAG is reading 830 mbar...2380-830=1550mbar or 1.55 bar...convert to psi you get about 22.5 psi. Now...your idle reading will be different, as I am in Colorado elevation...hope that helps...sounds like your REVO is boosing about what mine is though.

This is along the lines of what OxygenA4 stated, however atmospheric pressure isn't ALWAYS 1 bar...it varies based on elevation, relative humidity, etc.

zemun2

2.2 bar - 1 bar for atmospheric pressure = 1.2 bar boost = 17.6 psi

slugo10

Ok but why do you subtract idle from max?

Audi2ptzero

where you are will be a much lower reading and as you get closer to sea level it will reach 1013(IIRC) which is 14.7 psi or 1 bar of atmos pressure.

Audi2ptzero

The other 2 are correct, you have to remove anywhere from 900-1100 mbar from the vag reading. But the K03 can boost up to 25psi, I know because I used to run 24psi on my K03.

fourwheelslide

Because the VAG reading includes atmospheric pressure in it, and you are only concerned w/ boost.

slugo10

So I should be good with his reading of 2.2 bars at almost sea level?

fourwheelslide

Yes...that actually sounds a little low for a peak boost on REVO, so you're OK.