Its about time to pull the car apart for the turbo build. Should I start to run 89 oct in the car to get the 93 out?
I only ask because I want to TUNE for 89 oct with twin nozzle 100% meth.
But I WILL RUN 91 in the car after the tune. Just to be safe.Is 89 and 100% meth a good choice? stock motor.

Note I am also in the Air Force so 89 is all we can get if i PCS over seas.

 

I am starting to 2nd guess the 89. I thinking hp #s

 

That's a bad idea. Tune it in the same form as you'll drive it.