questions about SCT tunes - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 8 (permalink) Old 10-13-2006, 07:07 PM Thread Starter
 
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questions about SCT tunes

I have DJ's economy, tow and street tunes (and really like them btw). Should I expect better fuel economy with the tow tune over stock when pulling a 3k trailer? If I wanted to tow that trailer with the street tune (which when the truck is empty gives a 1.5-2 mpg increase) is there another reason besides EGT that should discourage me from doing that?
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post #2 of 8 (permalink) Old 10-13-2006, 07:13 PM
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DJ will tell you not to tow with anyones performance tune. The dang power stroke runs hot enough stock when towing. It only get worse when you add in some HP.
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post #3 of 8 (permalink) Old 10-14-2006, 02:43 AM
 
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Quote:
Originally Posted by wastedwagesracing
DJ will tell you not to tow with anyones performance tune. The dang power stroke runs hot enough stock when towing. It only get worse when you add in some HP.
Yes he will... I take it you have talked to him about it before...
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post #4 of 8 (permalink) Old 10-14-2006, 02:58 AM
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I tow my 27', 6500lb, boat with my ID street tune frequently. The only time I have to watch my exhaust temps is when i'm leaving the marina and climbing the very steep 1/2 mile stretch of road. Even then I can accelerate up the whole climb without breaking 1000deg.
On longer trips, like to Tahoe, I will reprogram to my tow tune. This way I don't have to watch the exhaust temps as much on the long steep grades and I benefit from the turbo braking on the down hills.
As far as milage, I couldn't say. I have no real set driving pattern to give a good baseline and i've got my foot IN IT every chance I get.
I do know that if I can keep it under 2 grand cruising that it will get substantially better milage with whatever tune i'm running.

'04 F250 FX4, CC, SB, Zoodad, Innovative SCT XCal2, 4" MBRP, Airaid intake, 4" Superlift front with 5.5" Fabtech springs in back with stock 2" block delete, 18" predators with 35" Nitto's, Isspro gauges overhead. '00 27' Rinker Captiva Millinium, 454MPI Captains Call exhaust. '06 '33 Tahoe Transport. '03 Polaris Predator 500, K&N, WB pipe, '08 Polaris Outlaw 525 S.
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post #5 of 8 (permalink) Old 10-17-2006, 09:28 PM Thread Starter
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Well, overheating wouldn't be good... Anybody actually watched water temp/coolant temp (using a reliable gauge of course) under those conditions?
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post #6 of 8 (permalink) Old 10-18-2006, 03:12 PM
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Water temp hasn't been a problem for me ever. Even towing my 12k 5th wheel up a long up hill mountain highway on a 90+ deg day. (with tow tune)
Exhaust temps are the big concern. You want to have a good pyro gauge. I've also never seen much more than 200deg on the trans temp.

'04 F250 FX4, CC, SB, Zoodad, Innovative SCT XCal2, 4" MBRP, Airaid intake, 4" Superlift front with 5.5" Fabtech springs in back with stock 2" block delete, 18" predators with 35" Nitto's, Isspro gauges overhead. '00 27' Rinker Captiva Millinium, 454MPI Captains Call exhaust. '06 '33 Tahoe Transport. '03 Polaris Predator 500, K&N, WB pipe, '08 Polaris Outlaw 525 S.
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post #7 of 8 (permalink) Old 10-18-2006, 03:31 PM
 
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it probably isn't the smartest thing but on my 04 i did ALL my towing in the insanity file, from 4k lbs all the way up to 22-25k lbs and as long as you watch the EGT's you shouldn't have a issue
robert
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post #8 of 8 (permalink) Old 10-19-2006, 02:51 AM
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Our tow tunes are set for up to 8500 lbs. After that, DJ doesn't feel it is safe, especially if you travel on hilly terrains. These trucks run hot as it is and if you tow outside of your dealership territory you end up at that dealerships mercy. Next step .. just be real nice. Lunch wouldn't hurt either

Thanks,
Vivian
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