You can get a NEW Bosch BPV for under $30, or get a JY one for a few $$, and fab up the rest of the plumbing yourself for under $5 in parts. Basically, the BPV vents high pressure air that backs up in the intake when the throttle snaps shut. It doesnt really add power, but the car will run much smoother, and the turbo will spool faster between shifts. Personally, I wouldnt drive a turbo car without one. This has been discussed many times... do a search on bypass valve. Dan E has some nice drawings in a fairly recent post of how he set his up.
------------------
Jeff Korn
88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 20 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 00 Windstar (wifes vehicle)
Jeff Korn
88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
11 Crown Vic Interceptor
14 Toyota Camry (wifes car)
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
