i know it is sil and i will get one, its just not priority no.1 right now. i have a hyperPAC that i will have to get rid of in the process.

 

Unless something has changed since i was informed, 03 isn't supported.

 

nothing has changed

 

i just bought a superchip 3815 and installed it on 91 octane, now my interior lamps will only stay on for 10 seconds and if i try turn on only one light they all come on, this is only when the ignition is off. i never noticed this before but now its happebning is this normal?

 

Hope they will get bored and make a change!

 

Don't get mad at me, I didn't want to read 153 pages. I'm sure yall understand, but my question is, whatever tune you used with the 3865, what was the best MPG gains with the 5.7 hemi? I want to have a nice performance tune to boost up the tq/hp but when I'm done having fun I'd love to get some better MPG as well. Thanks

 

only time i've heard people mention gains is with the 91 tune, usually running 93 gas. many people have confirmed this.

i personally saw no gain with any of the tunes, probably because I couldn't keep my foot out of it with the 91 tune

 

Even with the economy tune?

 

Econo tunes are usually the worst. Ive never gotten better from the econo tune but usually the opposite. 87/91 tunes are better as far as pep goes but again, it was more power if you will but never any increase in MPGs for me. No matter anything I have done (and ive done alot) Ive never seen any increase in MPGs.

Bottom line, dont buy a SC for mileage. Buy one if you want a bit more power out of your ride and more control over your truck functions.

 

i have a 2003 with the 5.9 im looking into getting the supchips for my truck just wondering if it is really worth it for the 5.9 motor? I have herd yes and no.... Also i see they offer 2 a 3815 and 3865 the 65 being more expensive whats the difference?


any help would be greatly appreciated thanks all!!!!