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Twin Turbo 535 RA-V Build
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06-16-2011, 12:08 PM
cgeise
Ultimate Warrior
Join Date: Jan 2005
Location: Ellensburg,WA
Posts: 2,944
On my 525 - it starts to get into back pressure "issues" at about 22 to 24 psi - we had the tubine housings modified and it helpped but is still there - I have been told the only way to fix it is 91s or 94s -- and those things are huge -
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