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mbc Help psi is all over the place!

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xxxturboracer

20+ Year Contributor
67
0
Oct 15, 2002
black lick,
i have a mbc on my 92 tsi . i have a 255 pump exhaust no air can all free mods i want to run a steady 15 psi but it it goes to 10 and lower on some days and other days it goes up to 13 psi i have the screw in as far as it goes what can i do to get steady 15 psi
thanks!!
 
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