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post #5 of (permalink) Old 06-14-2013, 07:39 AM
Dan V
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Join Date: Apr 1999
Posts: 1,293
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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.

'01 F250 4x4 Crew Shorty, PM Rods, new PIS 160/30's, D66 compressor by Dieselsite/w 1.00 ex housing, EBPV delete, ITP Regulated fuel return, Ford AIS.
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