Results of DP 40T/80E w/3.5" stock exhaust? - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 11 (permalink) Old 07-15-2008, 07:05 PM Thread Starter
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Results of DP 40T/80E w/3.5" stock exhaust?

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.
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post #2 of 11 (permalink) Old 07-15-2008, 07:09 PM
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Re: Results of DP 40T/80E w/3.5" stock exhaust?

Make sure to get a set of gauges. Then you can watch the EGT's and if it still needs a bigger DP you can, but IMO you should be fine.

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post #3 of 11 (permalink) Old 07-15-2008, 07:11 PM
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Re: Results of DP 40T/80E w/3.5" stock exhaust?

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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post #4 of 11 (permalink) Old 07-16-2008, 03:44 AM
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Re: Results of DP 40T/80E w/3.5" stock exhaust?

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.

2001 F-250 4x4 Crew shortbox, Optix gauges, DP F5 60towHighAlt, 80E, 100, 120. WW, ITP Boost Annihilator. DIY 6637 intake.
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post #5 of 11 (permalink) Old 07-16-2008, 04:47 AM
 
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Re: Results of DP 40T/80E w/3.5" stock exhaust?

You need to either delete the muffler or add a Walker BTM (big truck muffler)


I ran mine like that for a while and it worked great.

Was almost as fun to drive back then with "just a chip" as it is now
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post #6 of 11 (permalink) Old 07-16-2008, 11:10 AM
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Re: Results of DP 40T/80E w/3.5" stock exhaust?

i have the stock exhaust on mine just stright piped and it seems to be working just fine. I tow a boat over some pretty steep mountains and i've been fine so far.

02 ford f-250 powerstroke superduty. 6 1/2" lift kit 35x12.50 17x10 crusier alloy wheels. stright pipe, DIY intake, Dp tuner with 60tow 80econ 120race and 140agressive tunes and dipricol gauges.
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post #7 of 11 (permalink) Old 07-16-2008, 12:14 PM
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Re: Results of DP 40T/80E w/3.5" stock exhaust?

get some gauges and drive by them and you will be just fine... i ran stock exhaust for about 1 1/2 with my DP before going to a 4" turbo back and that only because i wanted a stack

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post #8 of 11 (permalink) Old 07-16-2008, 12:27 PM Thread Starter
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Re: Results of DP 40T/80E w/3.5" stock exhaust?

Thanks!

I've got the Scangauge, and just have to install the thermocouple unit.

Towing this weekend, the power was good, but I was imagining what it would be like if I had *just* a little more power.

It'll be nice to have that in by the end of the Summer.
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post #9 of 11 (permalink) Old 07-16-2008, 01:01 PM
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Re: Results of DP 40T/80E w/3.5" stock exhaust?

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.

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post #10 of 11 (permalink) Old 07-16-2008, 02:42 PM
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Re: Results of DP 40T/80E w/3.5" stock exhaust?

I tow up to 10k or more with My stock exhaust. Works fine you just have to watch the temps when climbing the hills.

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