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I'm wondering what would be the best compressor to turbine A/R values to get the best low RPM spool? Does anyone have some guidelines on what the effects of higher or lower A/R compressor or turbine have?
I've read through the FAQ many times, but it does elaborate on this very much.
For example, a turbo I am looking at is described as having a rapid spool with the specs:
T04E "O" trim T3/T4
Divided Tang T3/T4 flange
.57T COMPRESSOR WHEEL STAGE III
.84 A/R TURBINE HOUSING
.50 A/R COMPRESSOR HOUSING
I've never seen a turbo with such different A/R values. Usually I hear of .42/.48 or something like that as having a quick spool. I would have thought that a larger turbine A/R would increase lag, but wouldn't that also mean it would spool up at a higher RPM?
I've read through the FAQ many times, but it does elaborate on this very much.
For example, a turbo I am looking at is described as having a rapid spool with the specs:
T04E "O" trim T3/T4
Divided Tang T3/T4 flange
.57T COMPRESSOR WHEEL STAGE III
.84 A/R TURBINE HOUSING
.50 A/R COMPRESSOR HOUSING
I've never seen a turbo with such different A/R values. Usually I hear of .42/.48 or something like that as having a quick spool. I would have thought that a larger turbine A/R would increase lag, but wouldn't that also mean it would spool up at a higher RPM?