why not run a large tune when towing? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 22 (permalink) Old 06-08-2009, 03:42 PM Thread Starter
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why not run a large tune when towing?

I'm just wondering is it because of cylinder pressure, egt's, tranny? Im just just curious.

I want to run my street tune the innivative just redid for me and overall my truck trailer combo will weigh in at about 18500lbs. I have guages and keep an eye on things whenever i tow anyways.
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post #2 of 22 (permalink) Old 06-08-2009, 03:50 PM
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all of the above...towing with a hot tune is just not a good idea


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post #3 of 22 (permalink) Old 06-08-2009, 05:07 PM Thread Starter
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but im curious as to why? I mean, it is all in where you place your foot right? I know not to hotrod with a trailer on but more power makes sence. Im just trying to understand.
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post #4 of 22 (permalink) Old 06-08-2009, 05:09 PM
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If you keep a light foot and watch the gauges you can be alright, but why not just get a tow tune from them?

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post #5 of 22 (permalink) Old 06-08-2009, 05:56 PM
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If you are able to run a hot tune and tow and still keep your EGTs low then towing is fine... BUT with a good tow tune you dont have to watch the gauges all the time and makes everything a lot nicer/easier.

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post #6 of 22 (permalink) Old 06-08-2009, 06:04 PM Thread Starter
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good points you guys have. I was just curious if i was harder on the trans or what the story was. I really dislike going back and forth between tunes and prefere to stay with one. I am now running a street file and I told him my mods and that i was towing about 18500 and he reccommended a tow tunes but said he tows with an extreme file. so I was just curious. Thanks guys
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post #7 of 22 (permalink) Old 06-08-2009, 06:07 PM
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19K is a bit heavy, a street file should be ok if you have gauges to watch.i would just keep a strong tow file on the truck for a DD that way you have a bit of get up and go and the tow safe file in hand. Even with a strong tow file you can get up there in heat.


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post #8 of 22 (permalink) Old 06-09-2009, 09:18 PM
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I towed my 13,000lb boat last weekend with my street tune and the only thing I noticed different between my tow and my street tune is that my tranny liked the tow tunes alot better, but egts were fine.

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post #9 of 22 (permalink) Old 06-09-2009, 10:31 PM
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Go look at the latest issue of Diesel Power... They have a pic in there of a cracked piston from a guy running a hot tune and towing heavy.......

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post #10 of 22 (permalink) Old 06-11-2009, 03:32 AM
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as long as your flat you should be fine but when that hill hits and the tq converter is locked in 5th watch the egts climb fast! unless you slow down below 60
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