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Which Tune for Altitude and Hills with Atlas 80?
2005 Crew Cab 4x4
Currently has EGR delete, Banks exhaust, Atlas 80 FICM tune, canned SCT tunes, and blue fuel pressure spring. I run 5w40 with Rev-X and Rotella Ultra ELC. I monitor with an Edge CTS. I currently run the canned SCT street tune. It runs good. EGTs climb quickly if I stand on it, but I back off quickly when they get to 1250 or so, and they drop quickly as well. I really never tow.
It's going in the shop next week to get studs. I'm also adding the wicked wheel to my stock turbo and a regulated fuel return. Going to have the cat gutted, as well. Not that it matters, but it's also getting a 6“ lift and 37s at the same time.
I also just ordered a custom tune package from Gearheads with the SRL+, Extreme, 8k Tow, and Unlimited Tow. I plan to DD the SRL+.
I'm headed to the CO mountains next month (from DFW area) to do some camping and offroading at high altitude (above 10k feet). Still not towing anything, but I will be carrying several hundred pounds (maybe 1000) of gear and firewood, and there are obviously lots of long, steep hills on the way up.
I know the Atlas 80 is a relatively hot FICM tune. I expect it to be fine down here in the flatlands. I'm a little concerned about EGTs when I start climbing hills and getting up into the high altitude. I will take the SCT tuner with me so I can switch tunes if/when needed. I do not have a FICM tuner, so I am stuck with the Atlas 80. I suppose I could send it off and go down to the Atlas 40, but I'd rather avoid the hassle and just stick with Atlas 80, if I can make it work.
I'm really pretty clueless on this stuff, so here are my questions:
Which tune would be the absolute best for mileage and smooth driving manners on the long, flat road trip between here and there? Should I go back to stock, or maybe the canned economy tune? Stick with the SRL+?
Which tune would be best for Lower EGTs when I start getting into the hills and higher altitude? Should I switch to one of the tow tunes?
Finally, what would be best for when I'm over 10k' and running around the trails? I'll be unloaded at this time.
I don't mind switching back and forth, but it would be cool if I didn't have to. I worry a little about not giving each tune enough time to learn my driving habits, which will be unpredictable up there, anyway.
Also, what will the tow/haul button do, and when should I use it? Will it affect EGTs?
Thanks in advance!
Last edited by jluv; 08-14-2014 at 07:06 AM.