Thread: How Bout' a "Snow and Ice" tune
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Old Wed, October 28th, 2009, 11:04 PM
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Originally Posted by soutthpaw View Post
I drove up to Denver today in the snow and ice and came up with the idea of a Snow and Ice tune. currently I only had the 60 80 and 100 HP tunes loade. several times when i gave it gas on the hill climb on the freeway the wheels would break loose. Maybe Bill could add this to their selection of tunes for the FU and flip chip. basically we want to avoid wheel slip as much as possible. also want to stay off brakes as much as possible when slowing. Here are some of the things I was thinking about
  • below stock power levels on light to med throttle How about reduced power across the board...EASY to do. Limit torque to about 50% at all times.
  • hold the higher gears longer
  • allow 2nd gear manual startCan already be done by putting the gear selector in "2".
  • slow soft TC lockup delayed unlock Easy. I'd keep the unlock points the same....only because it's safer to use brake applications vs. engine braking.
  • engine braking automatically on decelEngine braking (or lots of it) is bad on ice. If you get the rear tires to lock up with braking, it's unlikely they'll start to roll again if there is too much resistance.
  • Longer glow plug on times They're already on for a stupid-long time as it is. Glow plug usage after the engine is started and has been running for 30 seconds is a waste of a good alternator.
  • faster engine warm up That's ALL determined by the driver. These engines will not get warm at all just idling away (or running with the exhaust backpressure valve closed @1100 RPM). Driving them is the only way to improve warm-up times. You have to realize that idling causes exhaust temps in the <300 degree range. With all the coolant that these beasts hold, it takes a good long time to get it hot without any combustion heat. Gassers typically run at 900-1100+ degrees at an idle which heats up the coolant a lot faster....even without a load on them.

any other ideas? As I am clueless about auto transmission stuff I am kinda hoping Cody or Bill can throw out some ideas...

I think this should also be a good MPG tune as we would be backing off the power and fuel levels :o
You have a good idea, but for the most part the only thing you can do to keep from spinning is using a stock program or less than stock power levels.

Keep the thinking cap on!
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Tuning, PCM flashing, and burning chips for 7.3s since 2008. Repairing all aspects of 7.3L Powerstrokes for 25 years.
Eight 7.3L PSDs in the driveway including a 1994 Crown Vic and 1973 F100/2002 F350. Looking for the next victim.
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