Re: Dr. Boost: Piston-type bypass valves (long)..... - Saab 9000 Bulletin Board - Saabnet.com
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Re: Dr. Boost: Piston-type bypass valves (long).....
Posted by sully (more from sully) on Tue, 23 Apr 2002 14:22:57
In Reply to: Dr. Boost: Piston-type bypass valves (long)....., zeke, Tue, 23 Apr 2002 12:11:15
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I noticed something when I installed my forge piston bpv. When boost climbs out of vacume just past 0, I audiably hear something shut then boost jumps 2-3psi. It's funny, if I ease the peddle in to get boost just at 0 the performance is week, then "shhlump", boost jumps a few psi and the car takes off. It is either my bpv slamming shut and then getting good boost because it's not leaking at idle or my wastegate is sticking. Its almost like the piston bpv's leak so much air that the turbo is fighting to keep up with the leak, then once it shuts, the car takes off.
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