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Hybrid Won't spool

Old 05-18-15, 07:33 AM
  #26  
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the difference between big and small shaft compressor wheels is 1/16".. it may not be slipping after you tighten the nut, but the difference is enough to put it way off balance, slowing rotation (spool) and the wheel is probably rubbing the housing making the howling noise
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Old 05-18-15, 09:38 PM
  #27  
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Yeah, I rebuilt the turbo, replacing all seals and bearings when I built the hybrid, so the side to side play was very minimal. Someone was saying that the gasket in the exhaust could vibrate producing a whining sound like a reef on a saxophone if the exhaust bolts were loose. I haven't pressure tested anything yet if that's what you mean by testing for boost leaks. I hope it's not the compressor wheel touching the housing. I figured it would grenade itself if that ever happened
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Old 05-19-15, 01:50 PM
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Perhaps you compressor wheel is not matched to your compressor housing. It may not have a tight enough clearance greatly reducing its ability to create pressure/boost.
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Old 05-20-15, 02:04 PM
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Well the compressor wheel and housing came off of another turbo. So they were meant to go together if that is what you mean
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Old 05-20-15, 02:06 PM
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On a side note my compressor wheel dimensions are "Compressor Wheel
Exducer: 69.31mm, Inducer: 53.90mm". I can't find anything like this. Is this a 57 trim? 60 trim? I know the dimensions but nothing else and I can't find another wheel with the same dimensions
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Old 05-21-15, 04:42 PM
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nobody?
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Old 05-22-15, 04:07 PM
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Originally Posted by WyomingTII View Post
On a side note my compressor wheel dimensions are "Compressor Wheel
Exducer: 69.31mm, Inducer: 53.90mm". I can't find anything like this. Is this a 57 trim? 60 trim? I know the dimensions but nothing else and I can't find another wheel with the same dimensions
T04b U Trim is 54/70mm
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Old 05-22-15, 06:38 PM
  #33  
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probably a V-trim

Compressor Wheels & Housings
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Old 05-26-15, 06:34 AM
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V Trim is 55/70mm
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