Engine Equal Or Un-equal?

[94coupe]

Probably not... you'll still be very much in the range that the computer can auto-adjust for with minor bolt-on mods. They might be able to eek out a few horses, but nothing you'll notice. You can probably do the same by advancing your base timing and running 89-octane.

what should my timing be? im set at 10 degrees

 

[madspeed]

13 degrees and listen for detonation

 

[94coupe]

13 degrees and listen for detonation

on 89 octane?

 

[madspeed]

Go for it. Its free hp as long as you dont experience detonation