I'm thinking about getting a tuner. From what I read on here a 3815,3865, or 3590 will work. Whats the difference?

 

I just bought a 3865. From what I have heard, the 3865 is half the size of the 3815 with a larger screen. I don't know anything about the 3590. But as far as tune differences? I am trying to figure that out too.

 

I got my 3865, and have tried the 87 tune, and am now running the mileage. I'm happy with it except for one thing, that 1-2 shift at 3k. Is there a way to bring this shift point down? I haven't had much time to play with this thing yet.