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bleucamaro bleucamaro is offline
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Join Date: Jun 2005
Location: Elk Grove, CA
Posts: 507
Bypass valves aren't really designed to work that way. The theory behind them is during shifts it dumps the pressure as opposed to keeping boost, which would flow backwards through the turbo, effectively stopping or reversing it. By dumping the intake pressure between shifts it allows the turbo to maintain speed (because there is no resistance on it) so it reduces lag.
1960 356 Super 90 - EFI'd
2017 Focus RS - Weekender
1989 190e 2.6 - Daily
Old 10-29-2014, 11:01 AM
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