Superchips Questions and Updates
No you can update the tuner without going back to stock on the truck with no issues.
Im sure the answer to my question is on here somewhere but its so full of info there are 62 pages so i was wonderin if someone could tell me what is the best programmer for my 03 Dodge ram 1500 5.7L Hemi with dual flowmaster exhaust and k&n cold air intake. Plz help thanks all!
Seems like we have similar vices. I also have a 03 Ram 1500 5.7, K&N CAI and flowmaster dual exhaust and I'm using the SC3865 91 octane advance tune. This has been the best spent money yet. It has really waken the truck up and the mileage has also improved. I'm running 285/50-20 (30.5") tires and the only down side is I can't get it out of the hole without a lot of wheel spin. Next mod will be a 3:92 gear with posi. The truck is serious fun.
Ok so it sounds like a few more of the updating bugs have been worked out so i went ahead and updated my cortex today. Well after updating my tuner and then updating the tune in my truck I started going through some of the functions it has.
When I went into the tire sizing function it showed 31.5" tires. My truck came with 33's and I curently have 33's on the truck.
My question is should I have changed it to 33" tire size from the 31.5" that it showed?
When I went into the tire sizing function it showed 31.5" tires. My truck came with 33's and I curently have 33's on the truck.
My question is should I have changed it to 33" tire size from the 31.5" that it showed?

My truck is the same way. I have the 275/60R20 (33”) tires, and the Superchips programmer says they are 31.5”. But I would leave it at 31.5”, that’s what it thinks the stock tire size is, so it won’t adjust the speedo. When I got the Flashpaq a couple years ago, I changed the setting to 33”, but when I did, my speedo was about 5 mph fast, so I kept it at 31.5”, and the speedo is perfect. Hopefully, one of the Superchips people can explain why it does this.
Ok so it sounds like a few more of the updating bugs have been worked out so i went ahead and updated my cortex today. Well after updating my tuner and then updating the tune in my truck I started going through some of the functions it has.
When I went into the tire sizing function it showed 31.5" tires. My truck came with 33's and I curently have 33's on the truck.
My question is should I have changed it to 33" tire size from the 31.5" that it showed?
When I went into the tire sizing function it showed 31.5" tires. My truck came with 33's and I curently have 33's on the truck.
My question is should I have changed it to 33" tire size from the 31.5" that it showed?

Sil
according to http://www.s-series.org/htm/calc/tiresizeconv.htm
275/60/20's are 33"
275/60/20's are 33"


