What exactly is the function of a bypass (or blowoff) valve?
10-24-2001, 08:46 AM
#1
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What exactly is the function of a bypass (or blowoff) valve?
I only recently learned what the wastegate does, since my turbo suffered the infamous "broken wastegate rod" issue.
I learned that the wastegate bleeds off extra boost on the exhaust side, so that the exhaust gases don't even spin the turbine.
So what does a BPV do? Does it bleed off boost on the cold air side? If the turbo has a wastegate, why is a BPV even needed?
Just curious...
-- P.
I learned that the wastegate bleeds off extra boost on the exhaust side, so that the exhaust gases don't even spin the turbine.
So what does a BPV do? Does it bleed off boost on the cold air side? If the turbo has a wastegate, why is a BPV even needed?
Just curious...
-- P.
10-24-2001, 09:39 AM
#3
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Further... if the BPV didn't release that pressure it would 'slow/stall' the turbo making
lag between shifts even worse. Assuming you take your foot off the gas when you shift 
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