Bulent Aliev wrote:

I believe the 1991 NA 13B has the highest compression rotors.
Bulent

Right, Bulent

The 1991 NA rotor has as compression spec of 9.7:1.  The NA 86-88 have a
9.4:1 and the turbo 89-93 has a 9.0:1 as best I recall.  The older turbo I
had 8.4 I believe.

Ed Anderson

 
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