ok guys i got my sct prgrammer and matt sent me the files last night i wanted to be prepaired so i ordered 4 tunes and the device only holds 3 i got the Extreme SRL, SRL+, 8k tow and unlimeted tow. just curious as to which tow to use or if i should even go with the SRL+ i mainly use my truck for daily driving sits in the shop 80% of its life i have a 10k camp trailer that i haul 3 times a year and the ocational tracktor no more than 8k lbs and whatever i can fit in the bed. i know im using the extreme SRL for sure thats a no brainer but as far as what other to to go with or are they easy to swap out

 

They're easy enough to change around. Just try what ever one's you like. All you have to do is just re-load the other tune on when you want to try it. Your SCT is just basically a thumb drive that holds your tunes, so when you put another on it it just writes over whatever is there. Try all of them and see what you like. If you're like the rest of us, the hot tunes stays on all the time until you're hooking a trailer up then the tow tune goes on.

 

ok thanks i loaded the extreme srl, srl+ and unlimited tow for now i had it on the extreme srl and holy crap thats alot of power i developed a coolant leak so i switched it to SRL+ for now i believe its coming from were the hose to the heater core conects to the passenger head were the sinister coolant filter ataches. i took the crappy crimp clamp off an put on a good screw type hose clamp it that solves it it will get put back on extreme srl cause its awsome. as far as the tunes which would yeid better milage the SRL+ or the Extreme SRL? i know alot has to do on driving habbits also

 

Mine never leaves the hot tune. No matter what I hook up to. Did the same on my 6.0's

 

The hottest tunes (highest timing) always have the best mileage, but you NEED to keep your foot out of it to do that.

 

ya i figured that ill go ahead and throw the extreme srl back in it and see if i got that coolant leak figured out