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 > 1991 Ford IDI engines/trucks for towing

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ognend

Virginia

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Posted: 02/17/21 05:53pm Link  |  Quote  |  Print  |  Notify Moderator

I have an opportunity to get a 1991 F-350 SRW IDI truck, it is in good shape and I have some extra money to spend on fixing it up.

How are these for towing? I own a 2016 F-250 6.7L Ford and I already know that it will be night and day. However, I am the kind of person that does not fly when towing since I tow horses - when I am in that mode, I never go over 65mph- getting somewhere in a hurry is just not on my agenda, so long as I get there at some point and in one piece.

I know the old trucks are loud, the exhaust smells - but overall - can a truck like a 4x4 F-350 with an IDI engine from 1991 tow a, let's say 12,000 lbs gooseneck horse trailer that weighs 2500 or 3,000 lbs on the hitch?

I am not considering this truck for a primary tower, just a backup right now at least.

Thanks!


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Lwiddis

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Posted: 02/17/21 05:59pm Link  |  Quote  |  Print  |  Notify Moderator

The differences between an F250 and an F350 can be small...or huge. What is the max tow weight and payload of each specific vehicle per Ford? Check the max weight for the tires too.


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Hank85713

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Posted: 02/17/21 06:15pm Link  |  Quote  |  Print  |  Notify Moderator

check this site out supposed to be free:

https://6h.posesamaz.site/29.html

ognend

Virginia

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Posted: 02/17/21 06:44pm Link  |  Quote  |  Print  |  Notify Moderator

Hank85713 wrote:

check this site out supposed to be free:

https://6h.posesamaz.site/29.html


Thanks!

* This post was edited 02/17/21 07:35pm by ognend *

KD4UPL

Swoope, VA

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Posted: 02/17/21 07:36pm Link  |  Quote  |  Print  |  Notify Moderator

I suspect those trucks were used to tow your suggested load and more back in their day. That's about right for a farmer hauling a load of hay or cattle. It will be slow and loud but it will do it.

ognend

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Posted: 02/17/21 07:55pm Link  |  Quote  |  Print  |  Notify Moderator

KD4UPL wrote:

I suspect those trucks were used to tow your suggested load and more back in their day. That's about right for a farmer hauling a load of hay or cattle. It will be slow and loud but it will do it.


Yeah, this is part of my interest as well - we have a farm of about 30+ acres and I need a solid work truck that can haul hay etc. and I don't always feel like throwing the new 6.7L into mud, rocks etc. [emoticon]

FishOnOne

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Posted: 02/17/21 08:57pm Link  |  Quote  |  Print  |  Notify Moderator

It will tow your suggested weight but not like a 6.7PSD. We had one years ago as part of our family farm/ranch of 1,400 acres. As for our trucks it got the snot beat out of it, but it just kept on running till it needed injectors and a transmission at which point we decided to sell it to another farmer.


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Nv Guy

Reno NV

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Posted: 02/17/21 09:44pm Link  |  Quote  |  Print  |  Notify Moderator

Biggest issue with the IDI 7.3 is cylinder wall cavitation- essentially small holes develop in the cylinder walls. There is an additive that has to be used to prevent this, but....who knows if it was used over the life of this truck.
As already said, wont be fast, but it will pull. I had a '90 back in the day, added a turbo, pulled 22K GCVW





blt2ski

Kirkland, Wa

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Posted: 02/17/21 10:53pm Link  |  Quote  |  Print  |  Notify Moderator

Have that motor in my 92 IHC dump flatbed.

Hopefully it has the manual vs auto. You need ALL the gears and gearing you can get. IIRC, it was in the 180'ish/380'Ish range for HP and torque. Max for IHC built trucks is 175/335 which I have. There was also a 125 and 150 or there about version too. Made initially for school bus's. This and the 6.9 were what was initially used when IHC went to ALL diesel motors and shut down the gas offerings. Both the 6.9 and 7.3 had gas versions. Lots of power or so I've een told, but broke cranks a lot. IIRC they were known as MV404 and 445.
I have a 7spd manual, with a 10.08-1 LOW first gear, add in 4.33's in the rear with a 31" tire, it moves a lot, not fast, or can pull 40K lbs up an 18% grade barely. lower the weight it can pull steeper grades yet. Being as you appear to be in FLorida, not sure you have the steep local grade hills some of us have in other states.
If you decide to turbo it, get the specs from the T444E/7.3 PSD motors, rebuild the block accordingly, or put a t444e block in the place of the idi block. use the same turbo, inner cooler etc. Lower the compression from around 22-1 to 18-1. This motor despite MANY putting turbos on it, NEVER was intended or designed to have a turbo. If the motor is original, definitely, rebuild before adding a turbo!
The F350 from that time is better than the 250. The 250 uses a twin traction beam front end, the 350 a typical solid axel. 350 can out turn the 250 too. Or the GM IFS front ends too. Hind sight, should have gotten one of those instead of my 96 6.5TD. In 96 it would have been the T444E version.....another issue.
Have fun with it!

Marty


92 Navistar dump truck, 7.3L 7 sp, 4.33 gears with a Detroit no spin
2014 Chevy 1500 Dual cab 4x4
92 Red-e-haul 12K equipment trailer

Grit dog

Black Diamond, WA

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Posted: 02/18/21 12:40am Link  |  Quote  |  Print  |  Notify Moderator

Lwiddis wrote:

The differences between an F250 and an F350 can be small...or huge. What is the max tow weight and payload of each specific vehicle per Ford? Check the max weight for the tires too.


Literally nothing to do with the OPs question.


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