dead pt54
- Thread starter GNTIM
- Start date
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BLACK6PACK
1 sec reaction King
- Joined
- May 24, 2001
- Messages
- 4,849
I think the 54 is about as big as you can get in the small shaft setup, but I could be wrong. I'm sure they can do something to it though.
You could go to the GT61 compressor wheel if your turbine is ok, or to a P trim turbine if the compressor is ok, or both 
. You might be able to go all the way to a GT67 compressor wheel in that housing but I'm not sure of that. I switched from a PT54 to a P trim GT67 turbo with 4" inlet and saw essentially no change in lag, and at 22-23 psi didn't really see any more power either (maybe 1 mph) but I haven't cranked it up yet. I think my bone stock heads are such a restriction for now that at that boost level I'm maxed out no matter how much more efficient the turbo gets - can't wait for my TA heads .
. You might be able to go all the way to a GT67 compressor wheel in that housing but I'm not sure of that. I switched from a PT54 to a P trim GT67 turbo with 4" inlet and saw essentially no change in lag, and at 22-23 psi didn't really see any more power either (maybe 1 mph) but I haven't cranked it up yet. I think my bone stock heads are such a restriction for now that at that boost level I'm maxed out no matter how much more efficient the turbo gets - can't wait for my TA heads .
