Paul,

What would be a safe top rpm for the 1989 stock turbo.  The do not exceed
speed.
Thanks
Rino

We don't know. My guess is around 100,000 +/- 10,000
I am going on the TO4_60-1 compressor map.
As I recall, Dave added the TO4_60-1 compressor shown in the
second jpg to the stock turbo and it fit. This loaded down the
turbine. It seems to be working so far.


Paul Lamar ...No rotor no motor.

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