question on turbo function

ryguy150 · Post by **ryguy150** » 16 Nov 2005, 23:10

Alright, this should be a simple question..... I am the new owner of a used '94 volvo 850 turbo (140000 miles on it) . I feel as though the turbo isnt functioning at its full potential. Is it normal that at no point during driving does the turbo meter get past 3/4ths of its range. In other words, I can floor the car in sport mode from 0-100 and the furthest point the arrow will go on the guage is only about 3/4ths of the way up(or halfway into the white area). is this completely normal for this model?

Post by **matthew1** » 16 Nov 2005, 23:22

The guage is not calibrated against anything. Therefore, it's a relative measurement (against itself) rather than an absolute measurement (against a real PSI number).

That said, mine (and others I've read about) don't hit the top either.

You should feel a nice punch from an 850 turbo. My 850 is very fast.

White850Turbo · Post by **White850Turbo** » 17 Nov 2005, 07:50

It's entirely possible that you have a boost leak somewhere. The white section of the boost gauge measures from 0 to 1 bar of boost pressure (That's 0 to 14.7 PSI in standard measurements). Stock boost on the 850 turbo is 0.63 bar. I agree with Matthew though, the stock gauge is horribly inaccurate and very slow responding. I'd suggest going with 1 360