Ordered gryphon and have some Q's

[ticopowell]

Originally Posted by Longshot270

If I were you I would change the 89 octane performance to a 91 performance...if you want two performance tunes. Because of how close together the ratings are there will not be any noticeable difference.

I agree with this too.

[asphalt-cowboy]

thanks guys if I keep the 89 and change the 87 performance to a tranny tune can I run 87 octane in the 89 performance setting? The only reason I dont want to change to a 91 octane is because 91 is not as available around here, their are some stations that carry it but its always more expensive. And another question when I get my gryphon will I be able to run the canned tunes until I get my custome tunes? Thanks for all the help this is a great forum

[Longshot270]

You cannot run lower octane than the tune. It has to do with fuel stability properties of the higher grades.

If you dont really want a 91 performance just stick with an 87 performance tune because there will not be a worthwhile difference between an 87 and 89 performance tune...you could also bump the timing up on an 87 performance tune if you are running 89 in the tank.

Yes, you can run the canned tune until the custom tunes come in.