Quote:
Originally Posted by TurboBRZ_UAE
Boost leak came out clean, which I expected given this is a sealed unit.
My tuner says it's logging 0.4-0.45 bar.
There's 2 avenues I see:
1) Bypass valve sticking open - which would not show up in a boost leak test, as it just bypasses from before to after the screws. How can I figure if this is closing properly?
2) The TVS screws themselves wearing down and losing a ton of efficiency. Does anyone know any shops in the EMEA region that I can send the supercharger to?
Thanks
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Update. Have zip tied the valve shut as best as I could (tight fit for my fat fingers underneath the manifold), and saw increased boost levels. It also makes wonderful whistling noises now.
Time to remove the blower and see what's really causing this. I may end up deleting the bypass valve with a blocking plate.
Further update:
Bypass valve actuator had a leaking diaphragm. Am replacing it with a new one
The part number stamped on the supercharger bypass valve actuator is VA783-A. Not sure if this is a standard Eaton part for the TVS R900. I believe the same part here:
https://superchargersonline.com/prod...eftup-va783-a/
See pics:
Curiously, this bypass butterfly should be sprung closed, so any leak would simply keep it closed and not result in a loss of boost.
Only other cause I can imagine is belt slippage. Will try to diagnose that with the charger back on