6.9/7.3 IDI Trucks Questions - Ford Powerstroke Diesel Forum
Non-Powerstroke General Discussion General Discussion for 6.9L and 7.3L IDI (Non-Powerstroke) Engines

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post #1 of 14 Old 04-13-2010, 08:34 AM Thread Starter
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6.9/7.3 IDI Trucks Questions

I sold my 06 6.0, now i'm looking for a 6.9/7.3 IDI truck. I got a few questions about these trucks and was gonna ask the veterans of the IDI trucks.

What kinda fuel economy do these trucks normally get?

How realiably are the trucks?

How long will these truck run, far as the miles that you can put on one?

And if anyone is wondering what i plan to do with a truck like this, i plan to use it a my daily driver/work truck. And do some mild towing from time to time.

Thanks in advance.

Cory

1995
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1993 F250 XL RCLB Turbo 7.3 IDI zf5 2wd 223k miles; 5 inch exhaust & tint -sold-
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post #2 of 14 Old 04-13-2010, 07:17 PM Thread Starter
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Anybody???

Cory

1995
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F-250 XLT

7.3 Powerstroke Lapis Blue Metallic SuperCab ZF5 3.55 2wd Long Bed 275k miles
3.5 from the downpipe to stock 6.4 muffler, 43367 diy intake.

1993 F250 XL RCLB Turbo 7.3 IDI zf5 2wd 223k miles; 5 inch exhaust & tint -sold-
2006 F350 Lariat Harley Interior CCSB 6.0 Powerstroke 5r110 4x4 43k miles; SCT, EGR delete, ARP studs, tint, & 5 inch exhaust -sold-
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post #3 of 14 Old 04-14-2010, 05:55 AM
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My truck gets about 16-17mpg, more or less depending on how I drive it. But I also dont have overdrive, if I did, I know I could be right at 20mpg. As far as how long they will last, I know of motors lasting less than 100,000, and I know of a couple people who put more than 500,000 miles on an IDI without a rebuild. Really just depends.

Realiablity. Once you buy it, and start working out the bugs as it is an old truck, they become relialbe. I drove my truck from Oregon to Texas (2500miles) in about 2.5 days and it made it here perfectly fine. I would make that run again in a heartbeat.

-Justin-
1985 Ford F-250 with a 6.9 IDI/T-19 4speed 4x4
Paint, Eagle Alloys, Kelly Safari TSR's, ATS turbo, gauges

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post #4 of 14 Old 04-14-2010, 08:28 AM Thread Starter
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Well thats what i was wondering, my dad had a 1993 IDI dually bought with 23,000 miles and keep from 1994 til 2005. He had it for 11 years and far as i know he never done anything major to. At around 128,000 miles he put the Banks turbo kit on it, the bout a year and half later he sold it with i think 134,000 miles.

I grew up around these type of trucks and miss his old one. I sold my 06 6.0 and i'm wanting another one. I just wanted a second opinion on the ole IDI trucks. But sounds like these trucks are tough as nails.

Cory

1995
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F-250 XLT

7.3 Powerstroke Lapis Blue Metallic SuperCab ZF5 3.55 2wd Long Bed 275k miles
3.5 from the downpipe to stock 6.4 muffler, 43367 diy intake.

1993 F250 XL RCLB Turbo 7.3 IDI zf5 2wd 223k miles; 5 inch exhaust & tint -sold-
2006 F350 Lariat Harley Interior CCSB 6.0 Powerstroke 5r110 4x4 43k miles; SCT, EGR delete, ARP studs, tint, & 5 inch exhaust -sold-
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post #5 of 14 Old 04-14-2010, 06:19 PM Thread Starter
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Anyone else have any input on this matter?

Cory

1995
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F-250 XLT

7.3 Powerstroke Lapis Blue Metallic SuperCab ZF5 3.55 2wd Long Bed 275k miles
3.5 from the downpipe to stock 6.4 muffler, 43367 diy intake.

1993 F250 XL RCLB Turbo 7.3 IDI zf5 2wd 223k miles; 5 inch exhaust & tint -sold-
2006 F350 Lariat Harley Interior CCSB 6.0 Powerstroke 5r110 4x4 43k miles; SCT, EGR delete, ARP studs, tint, & 5 inch exhaust -sold-
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post #6 of 14 Old 04-15-2010, 08:06 AM
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post #7 of 14 Old 04-15-2010, 09:11 AM
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The idi is a good truck, i like the 6.9 better because they have more metal which makes it a little bit better with the heat issues they have, they also have some issues with warping heads. The IDI will NOT run like a 6.0, but you can get close, with performance questions I would ask Justin... FordGuy100... He seems to be able to answer about all the idi performance questions on here, but a good friend of mine has a 92 idi and it has a turbo and injectors, I thought it was going to make it a beast but it made it run more like a 99-03 7.3l... Which isn't a bad thing and he gets 18-20 mpg stock he was lucky to get 15-16

2003 F-250 RC/LB 6.0L with Innovative tunes, K&N FIPK, 3.5 inch down pipe to 6 inch stacks, ARP studs, Autometer gauges, 2006 grill and bumper.

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1984 Ranger RC/LB 2.2L Perkins, turned the pump up, turbo off a Mitsubishi 2.3L, and yes it rolls coal, it's not fast, and it's not for sale. 290k miles 43 mpg
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post #8 of 14 Old 04-16-2010, 08:15 PM
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Good performance goes like this.

Pull the engine, 6.9 is perferable as no cavitation issues. Clean up the heads (make the runners nice and smooth). Instal ARP headstuds, or have a machine shop drill and tap the heads and block for 9/16" head studs (expensive but you probably wont every blow a head gasket). New bearings in the motor. Torque grind cam. Have the pistons shaved and then ceramic coated, lowers compression some. Put the heads on. Install studs for the intake manifold and exhaust manifolds. Turbo, I would find a wastegated ATS, and instal a Super 60 intake wheel. Fab up an intercooler using a 7.3 or 6.0 intercooler. Buy Super moose pump, and injectors (160cc's I believe). If auto tranny, build it. And lots of gauges.

I would probably look at a DT466 turbo as well. Custom fab it.

I think with that work you would be in the 325-350hp at the wheels, and 600ft lbs? But you would have awesome bottom end with the IDI as higher compression (even if you lower it some).

My truck with the pump not turned up all the way ran a 17.7 quarter mile. Somebody on here said there OBS PSD with an auto and open intake/exhaust, ran a 17.9. With it turned up more, I should be in the 17.5 range I think.

-Justin-
1985 Ford F-250 with a 6.9 IDI/T-19 4speed 4x4
Paint, Eagle Alloys, Kelly Safari TSR's, ATS turbo, gauges

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post #9 of 14 Old 04-16-2010, 08:22 PM
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My cusion bought a 90 IDI with 300K and it fires up with literally a snap of the key and actually runs really smooth all the way up to 3K RPM's.
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post #10 of 14 Old 04-16-2010, 08:23 PM
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Just like any old vehicle the thing your gonna have a problem with is finding parts.
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