Quote:
Originally Posted by spdrcrgtr
How do you check for boost leak other than a "smoke check" where they run some smoke thru the intake to see if it comes thru some crack/space
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You need to pressurize your intake post-Turbo(s) to do a proper boost leak test. A smoke test only catches things that are leaking with no pressure - and often the leak is during boost.
I typically fabricate a hose and connect to the turbo inlets directly (you don’t want to pressurize the pre-turbo pipes themselves as those run under negative pressure, as they are connected to the turbo inlet not outlet).
You need to make sure your throttle is closed (or disconnect at throttle and block the pipe) then pressurize with a compressor. I typically take it beyond max target boost to be sure, and you just listen for leaks and fix them. If you just leave the throttle pipe on and rely on the closed throttle butterfly you may get some leaks there, though should be minimal on a fly by wire car.
Thanks!
S.