My '00 7.3L Excursion is my tow-rig/family-hauler, so I've been contemplating getting the DP chip with the decel/40T/80E tunes, coupled with a BTS valvebody. Mild compared to what others are running, but that would suit my needs well.
Given those tunes and my use of the truck, I'm contemplating sticking with the stock 3.5" system rather than going to a 4". I'm happy with the stock sound, and am not looking for maximum performance, but just better performance.
Has anyone had any experience with those DP tunes on a motor with the stock 3.5" exhaust? Good or Bad results?
About the only concern I've heard about doing that would be the EGT's, but I am only towing through the Berkshires, not the Rockies, where even the stock setup is sufficient.
My buddy runs a stock exhaust with a straight pipe on his 02 crew cab short bed & can tow his boat (not a small boat either) in 120 race. We don't have the hills around here like some of you folks do. Just take it for a drive & watch your pyro, you can always do a 4" later if you want/need to.
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I tow a Jeep TJ on one tons, and 40" tires around with the Truck in my sig. Stock exhaust and the EGT's stay just fine in the 60tow. You have to push it for a while to get to 1200deg in the 120 tune on the street.
My parent's truck is running a DP-Tuner with the 40t and 80e tunes, all on stock exhaust and intake. They tow a travel trailer almost every weekend, so their truck does work quite a bit. No problems, and they have no plans to upgrade (..... old people).
You'll be just fine.
2002 F-250 PSD
Gambling with 250/200's on PMR's.
478hp/851tq on Haller's dyno - 7/28/12
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