I'm under the impression that my turbo is not operating as well as it is supposed to. Little sluggish...maybe a cat problem... I am only able to get my turbo gauge to 1/3rds of the way on the solid white area of the turbo gauge. The solid white part of the turbo gauge begins at 12 o'clock...How far can the turbo needle go on the gauge? Thanks for the responses.

Sustained boost, sounds roughly about right; if it's low it's only slightly so, You should be able to get bursts and spikes with higher readings. Here are the results I get according to the aftermarket VDO boost gauge I have installed in my S70T5 with automatic transmission.

Normal sustained max boost: 9-10 psi (maybe halfway or a little more into the white zone of your oem gauge).
Boost spike: 18 psi under certain conditions (already going 50mph when I torch it to pass a truck)
Start-up until about 25 or 30 mph: 5 psi

The ECU in my car is very aware of what the operating conditions are, and regulates boost accordingly. Unlike 97 850 with hi-pressure turbo and manual gearbox, I can't spin out as the boost is initially limited. When I'm already doing 50 and go to pass another vehicle, I am rewarded for my assertiveness with an 18psi spike and an exhilarating ride for a few seconds.


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(98 S70 T5SE misc mods - mostly lighting - and red calipers) (92 940GLE)

It should go to 3/4 of the white.ive had it to within a few mm of the end but i was driving very very very hard.

It should go to 3/4 of the white.ive had it to within a few mm of the end but i was driving very very very hard.