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Old 10-12-2015, 10:46 AM   #15
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When I bought my 2500 Ram I made sure it had the Cummins chip in it.
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Old 10-12-2015, 11:01 AM   #16
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I use the BullyDog tuner. Has a lot of options so it works pretty well. I can go with the more aggressive tune however it does ping on grades. I use that tune when unloaded and get 22 mpg. I have an intake system on there too. For towing, I back off on the 'performance' tune and it works fine. Mostly the shift points are spread a little better (6 spd trans). I can also monitor my trans temps which has been a HUGE help when towing my boat across the dessert. My truck is a 2012, so I also shut off the MDS.
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Old 10-12-2015, 01:40 PM   #17
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I wish i could put the "cummins chip" into my truck😆
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Old 10-12-2015, 04:16 PM   #18
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Quote:
Originally Posted by scottandanna View Post
I wish i could put the "cummins chip" into my truck😆

Just dump some oil in the gas tank so it smokes and hang a bunch of nuts and washers off the exhaust manifolds so it rattles... voila! $10 diesel conversion kit.
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Old 10-12-2015, 07:03 PM   #19
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Just dump some oil in the gas tank so it smokes and hang a bunch of nuts and washers off the exhaust manifolds so it rattles... voila! $10 diesel conversion kit.
HA!!!

But still, no towing power...
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Old 10-12-2015, 07:06 PM   #20
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BTW, just happened today....

My little boy has grown to be a MAN!...
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Old 10-12-2015, 07:12 PM   #21
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Wow! That's awesome.
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Old 10-14-2015, 03:32 PM   #22
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Well, got the superchips and filled it with super unleaded, and ran the performance program, and it is PURDY NICE! This is just the stock Performance 91 octane program.

If the change from Stock to Towing is as noticeable as the change from Stock to Performance 91, I will be plenty pleased.

Will be using it this weekend to tow the travel trailer, so we will see.

Surprisingly, it seems to have IMPROVED my gas mileage...
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Old 10-14-2015, 03:42 PM   #23
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Our son has the hemi and and all the chips he can put in it. I make better mileage pulling his trailer than he does running empty. Go figure.

Hemi = need gas.
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Old 10-14-2015, 03:51 PM   #24
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No comparison between gas truck and diesel. But I bought a gas truck 11 years ago, it is paid off. Didn't start towing a travel trailer until this past spring. So stuck with what I got.

If I get too irritated, I will just go back to towing with the diesel grand cherokee. Pulls it just fine.

FWIW--my hemi gets 20-22mph higway, and 16.5 avg over my week of daily driving. No complaints there.

But drops to around 8 when towing this trailer. I can tow my 19' ski boat and still pull 15-ish. But it cuts through the wind WAY better than the travel trailer.
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Old 10-14-2015, 04:24 PM   #25
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8-10 is probably as good as it gets towing a TT with a hemi. Some of the earlier ones, especially the early 2500 got horrible mileage. Empty I get 1-2 better mileage with my bone stock 6.4 than my father's deleted/tuned/5" exhaust 6.7 cummins 3500 drw. Towing he gets me by 1-2 mpg. His has the 4.10 helical gears. It will pull a train.

300,000 miles and still towing strong with yours! I hope I can get that out of my 6.4. Hopefully you like your tuner for towing. Keep us updated.

From what I have read, long tube headers really wake up a hemi. In fact on a 6.4, a cat back is almost pointless for anything other than sound because the manifolds are the restriction.
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Old 10-15-2015, 09:54 AM   #26
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I can't help specifically for a hemi, as I own a 96 cummins, and a 06 powerstoke. And the cummins, doesn't have much to offer in the way of tunes. But as others have mentioned get a custom tune over a canned tune, if possible. I have a custom written tow tune on my powerstoke and love it. It's only seen mostly local tows, horse shows and bringing our new to us toy hauler home a few months back, but I love the change with the custom tune.
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Old 10-15-2015, 10:48 AM   #27
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We are heading out for a 2-3 hour tow tomorrow, with the truck. Previously, I have only towed it 30 miles, which was enough for me to realize it was no fun, even compared to a small 3.0 turbo diesel.

I got 8 or 8.5, but it was the constant up- and down-shifting that bothered me the most. Even on level ground.

Tomorrow will have some minor hills, but nothing significant.

Will put the Tow program on and see if I will ever tow with the truck again (other than short distances or during emergency hurricane escape!).
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Old 10-15-2015, 01:37 PM   #28
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Even when using the "TOW" mode, there is no reason why you can't pick the gear you think runs best for hilly terrain and stay there. Now I know that there is a difference between the diesel I have and the Hemi we're talking about, but for rolling terrain I put the transmission in 4th or 5th gear even in "TOW" mode just so that when I get to the steeper ups and downs there is no gear hunting and the engine just purrs up and growls down.
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