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Jon P.
11-03-2003, 12:10
I recently installed a boost gauge in my 1999 K2500 Suburban. The gauge is tapped into the upper intake manifold, about an inch or so past where the flexible connector from the turbo charger is attached.

What are normal values? I've had the boost go as high as 11, although it rarely goes past 6 or so. It won't stay at 11 for more than a second or so -- it quickly drops down. I assume that this is the wastegate opening. This is all lightly loaded, with nothing in tow.

advanracing62
11-03-2003, 13:43
I think the PCM opens the wastegate to control boost, The boost fluctuates based on some value that the BCM gives the PCM... I think

cruzer
11-03-2003, 13:59
Jon P, Pretty sure your boost pressures sound right for stk.

Turbine Doc
11-03-2003, 19:40
John,

David Brady
11-04-2003, 12:13
Those values sound like what I had stock, maybe not that high on the spikes.