1991 Ford IDI engines/trucks for towing

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.

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

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

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.

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. ;)

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.

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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.