'1990 Ford F250 7.3L IDI - Diesel Forum - TheDieselStop.com
7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

 
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post #1 of 11 (permalink) Old 11-03-2018, 12:02 PM Thread Starter
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'1990 Ford F250 7.3L IDI

Hey y'all,
I'm looking at a 1990 Ford F250 7.3 IDI with a 5spd manual. Can it tow close to what my 1999 F350 PSD with 4spd automatic can tow? I've seen where automatics can tow a few thousand more pounds so I know it won't be exact.
Plus if I put some 1 ton springs on it can the rest of it handle the additional load? I want a f350 but finding an f350 IDI with an extended cab in my area is like trying to find an unicorn & I don't want a standard or crew cab.
I know later f250 & f350 super duties use same frame & drivetrain but I haven't found any info about the earlier ones.
Basically, I want to turn this f250 into a "f350" truck but only if it can handle it safely. The main thing is towing.
I appreciate any info.
Jack
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post #2 of 11 (permalink) Old 11-03-2018, 12:12 PM
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The idi wont hold a candle to the powerstroke....
Especially since you didn't mention it being turbo.

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1994 F350 7.3 PSD 4X4 ZF5 DUALLY
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post #3 of 11 (permalink) Old 11-03-2018, 01:19 PM Thread Starter
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Thanks for the input. Nope, no turbo. I'm aware it won't be the same. At this point I'm not looking for speed, just muscle. That's my big concern, can it handle the weight. If I need to do something quick I got the 350 psd.
Thanks again.
J
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post #4 of 11 (permalink) Old 11-03-2018, 04:16 PM
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That's my big concern, can it handle the weight. If I need to do something quick I got the 350 psd.
You've posted twice now and have yet to say what the weight is?

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'91 F-250 SC 4X4, 5spd. ATS Turbo, 3:55 diff.
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post #5 of 11 (permalink) Old 11-03-2018, 08:10 PM Thread Starter
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Sorry about that. I mean the weight that a 1 ton can handle. Is the 1990 f250 frame & axles the same as the f350 from that era like they are on the later super duties so it could withstand up to the 1 ton cargo.
The more important thing would be the towing. 12k - 14k towing a couple of times a year for < then 100 miles each trip.
Thanks
J
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post #6 of 11 (permalink) Old 11-03-2018, 09:23 PM
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I wouldnt even think about putting 12,000 pounds behind a non turbo 7.3 IDI.

1994 F-350 7.3 IDI Turbo, crew cab, E4OD,4:10 L/S, LB, Dually
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post #7 of 11 (permalink) Old 11-04-2018, 07:58 AM
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It's all a matter of weight distribution. I've pulled 11,000 & 12,000 lbs. gross loaded trailer weight (not including 6000 truck weight) and there was no way my pickup itself was overloaded due to having proper weight on my trailer's 7000 lb. axles. However, years ago I got roped into pulling a goofy designed Sooner or other high dollar brand LONG gooseneck horse trailer with living quarters. When I set it down on the ball, my truck really sat down in the rear because the trailer axles were at the very back. It only held 2 horses side by side at the rear and that's where the axles were.
But like Chuckster57 said, 12000 is a decent load, even with a turbo, wouldn't want to do it every day unless it was all flat country.

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post #8 of 11 (permalink) Old 11-04-2018, 08:37 AM
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I am under the opinion that the axles on the F250 vs. the F350 were the same. The diff was in the suspension which can be modified to equal that of the F350? Perhaps that has changed over the years of the IDI?
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post #9 of 11 (permalink) Old 11-04-2018, 11:27 AM
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If I remember right, the later F-250's have coils in the front, right? I wouldn't want any stiffer suspension on my old '91 4X4, it rides like a board as it is. Stock from the factory there's only 3/4" to 1" front spring travel until they hit the bumper stops on the frame.

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post #10 of 11 (permalink) Old 11-04-2018, 02:01 PM
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Depends what setup it has.
4wd vs 2wd, cab/bed configuration play a part in what suspension/axles you have.
Iirc, the F350 will either have the D60 (for 4wd) or the monobeam for 2wd. I think I've seen coils on the monobeam, all d60 will have leaf springs.
Now on the TTB setups, I think for the trucks, they all had leafs as well.
The coils for pickups didn't come out til after 04 or so, I think.


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1994 F350 7.3 PSD 4X4 ZF5 DUALLY
PHP HYDRA, 6637, 3-4 DP TO STRAIGHT 4 BEHIND THE TIRE, 1.0 EXHAUST HOUSING, DIY D66 TURBO, FUGA E-FUEL, EBPV DELETE. Cooper discoverer AT/3'S.

2010 VW JETTA TDI DSG Kerma tune. Hankook ventus v2 concept 2.


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post #11 of 11 (permalink) Old 11-05-2018, 05:05 PM
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I've pulled 12000 pounds with my non turbo F-350. It worked its butt off, and I wouldn't want to do it every day, but it did it. Couldn't make more than 40 MPH, an forget 5th gear even exists. If I recall right the 250 has lighter leaf springs uder it.

1993 F-350 crew cab non-turbo 5 speed transmission
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