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Old 05-13-2009, 12:10 AM   #1
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base boost/bpv questioning.

Okay, so as always, my questions are never singular. I went to the junkyard and grabbed a bpc from a 9000, were both t5 so its interchangeable right?

So i did the cleaning procedure using carb cleaner and compressed air. I got a bunch of brass sprinkles out of it, so i felt good that i did it right.

Then I installed it and went to the freeway, now im only pushing 4lbs of boost. So the BPC is the faulty. I put the compressed air (80psi) directly on the bpc, is there a diaphragm or anything else that I might have destroyed by doing that?

Next, I'm running 4lbs of boost, that sounds like im on base boost if the bpc is faulty. Is 4lbs the correct amount? I though it was somewhat higher.

Car: '96 900se JZW stage 3+ (t5)

Thanks in advance!
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Old 05-13-2009, 12:15 AM   #2
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I don't think that something meant to take 12psi is going to hold up very well to 80 psi. Also if the bpc has brass shit coming out it probably wasn't any good to begin with.

I think saabkid has a bunch of bpc's (4 or 5) for $35 and I'm sure one of them would be good.
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Old 05-13-2009, 03:23 AM   #3
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Yes, the 900 and 9000 bpcs are interchangeable.

4psi sounds like base boost....and kinda low.
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Old 05-13-2009, 04:26 AM   #4
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Base boost should be 5.5psi to 6psi. Sounds like your needing to adjust your wastegate as well.



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