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My X5 diesel has same dilemma with turbo entrance design.
To troubleshoot my boost leak, I made this contraption. Took a couple weeks of trial and error, but got it done in the end.
Works like a charm.
Ruptured boost hose showed itself within 10 seconds after pumping.
Then, was pumping at 40psi into turbo and seeing 25psi before intake manifold (after throttle body). The 15 PSI was getting lost through turbo seals. Normal or not - I was not able to find out. But, 25psi into intake manifold is probably enough.
The contraption: Since there's no boost pressure kit existing for these kind of turbo housings, I was thinking to gauge interest to make a few of these kits.
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