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'99 & up Upgrades and Aftermarket - 7.3L Engine Upgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

Thread: Dp Tuner..with 35's and 3.73's Reply to Thread
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  Topic Review (Newest First)
06-17-2013 02:24 AM
[email protected] Sorry, I did not see this thread until now.

Glad you are happy with the chip!
06-14-2013 07:37 PM
z21ranger Thanks for the info guys! I got the DP Tuner F5 chip in the truck! What an AMAZING difference! The tunes are smooth and powerful, idles smoother, shifts are firm and smooth! What an awesome updgrade! Thank you DP Tuner!
06-14-2013 08:39 AM
Dan V
Quote:
Originally Posted by z21ranger View Post
Currently running a stock 2001 7.3 truck on 325/60/18s, towing 5-6k pounds regularly.

Have a DP tuner F5 on the way with 60/80 econo and 60/80 tow tunes.

Gauges are in the garage waiting to be installed with chip. 4 inch exhaust and AFE air will follow very shortly.

My question is how will the truck tow if I go to 35's? Its okay on 33's in stock form. Don't want to lose that performance with 35's. Will the tunes make up for the loss of gear ratio with the 35's? I'm not interested in regearing, would just stay with 33's if I lose too much towing power. Thanks
I also have a an '01...mods listed in my sig. I think you'll be fine with the smaller loads 5-6k lbs with.

I pull double that with mine and run 265/75r-16 (32") and can state....I'm wishing for 4:10's. I'd like to have about 2000rpm at 65 with the load I pull....or more power.

I went here Gear Ratio Calculator and inserted some info.

At 65mph with 35's you should have about 1670 rpms. With 32's it will be about 1820.

My 80Hp tow tune is really sweet. Jody does/did a great job on the shift points and downshift points.
06-13-2013 08:03 PM
RT Make sure and upgrade to the 6.0 cooler. Probably shouldn't try towing a 5th wheel like that, but occasional 6,000 lbs. will probably be ok.


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06-13-2013 07:52 PM
z21ranger Didnt talk with Jody, didn't think about it. That was not the brightest thing I've done this week. I guess if its horrible I can send the chip back to have it tweaked.

What are your thoughts on the transmission?
06-13-2013 07:43 PM
RT I believe your engine will handle it just fine- I think your issue will be the transmission - did you tell Jody what tire size / gearing combo you will be running? At least he could adjust the shift points.


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06-13-2013 06:30 PM
z21ranger
Dp Tuner..with 35's and 3.73's

Currently running a stock 2001 7.3 truck on 325/60/18s, towing 5-6k pounds regularly.

Have a DP tuner F5 on the way with 60/80 econo and 60/80 tow tunes.

Gauges are in the garage waiting to be installed with chip. 4 inch exhaust and AFE air will follow very shortly.

My question is how will the truck tow if I go to 35's? Its okay on 33's in stock form. Don't want to lose that performance with 35's. Will the tunes make up for the loss of gear ratio with the 35's? I'm not interested in regearing, would just stay with 33's if I lose too much towing power. Thanks

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