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Originally Posted by Brian Carlton
If the turbo is functioning properly and is not damaged in any way, the only thing controlling boost is the wastegate. So, if you pinch the wastegate hose, in theory, the wastegate cannot open.
However, if the wastegate valve itself is not seated for any reason, then it allows bypass of exhaust gas and may limit boost. This is a rare occurance, AFAIK.
If you pinch the wastegate hose and get boost that climbs over 11 psi, then you know the wastegate spring needs adjustment.
Be careful when you drive it with a pinched wastegate hose. Watch the boost carefully. It will climb pretty quick if things are working properly. |
I seconf that....I had a boost controller on my W116 and I thought I had it cranked down enough but it still went up to 20 psi in the time it took me to pull my foot off the go pedal.....that was in about 50 feet.....so yes it happens REAL fast.
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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche
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