is there much of a difference
 

I have the 1 tranny only 2tow tune and 3 93 performance. My question is should i change my 1and 2 from trans only and tow tune to a 87 performance and a 89 peformance. I never tow anything and will never use tranny only . is it worth it to change .If I do change them how hard is it to do that and is there a fee . well Im sure theres a fee its my screw up not theres :giggle:. thanks for the info

I would not think there is that much difference between an 87 and an 89 performance tune. I seriously doubt having those TWO custom tunes would be worth the cost ($30.00 for each I believe).

Since you DON'T tow anything, I'd replace the #1 Tranny tune to an 87 Octane custom tune and leave the other two alone. If you ever decide to fill your tank with 89 octane, you could just add 1 degree to the timing in that tune.

The only time I reset my tunes is when I switch from a towing situation to a prolonged non-towing situation. I think most of us work that way, we load the tune we like and just keep it there.

- Jack

In general, there's not enough of a noticeable difference between the 87 and 89 programs to warrant the expense of an additional tune. We usually end up going with 87 performance, 87 towing, and 93 performance for most applications. If you don't have a need for the towing program, save the $30.00 and just go with the 87 and 93 performance.