hypertech help
There arn't many settings as I recall. I mean the cheaper gas setting gives a slightly better power curve as I remember on the graph. You shouldnt need to change tire size.. and of course you need the powertune. Thats pretty much It as I recall.
I run my 01 5.2 on the 87 Octane setting, but run 92 octane gas through my truck. Ive also adjusted the tire size to match my 33/12.5 tires. I left the rev limiter alone, and left the top speed limiter alone, as neither of those are of any use. Ive noticed after playing around with it now for about 2 years that I see the best performance this way as far as mpg and butt dyno. just my opnion though, everyones preferences will probably be different.



