mileage - Ford Powerstroke Diesel Forum
7.3L IDI (Non-Powerstroke) Diesels 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 8 Old 12-18-2008, 11:02 PM Thread Starter
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mileage

hello im looking at an 85 7.3 250 for a steal and was wondering what am i going to be looking at for mileage wise out of it? I also heard these trucks dont have a top end really is that true?

T.I.A
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post #2 of 8 Old 12-22-2008, 04:33 PM
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Well unless someone swapped in that 7.3, that year should have a 6.9 in it.

And top end like powerwise, or like actual topend (like what someone would refer to on a dirtbike or something)?

-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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2004 2wd Excursion Limited 6.0. Testing how loyal I am to Ford
1997 Passat B4V TDI. 1 of 80 imported in 97. 50 MPG and a factory 25 gallon fuel tank!
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post #3 of 8 Old 12-22-2008, 04:39 PM
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Mileage is going to depend on what things are done to the truck, ie, exhaust some sort of intake. Not to familiar at all with an 80's model F-250.

All stock, id say 10-12

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post #4 of 8 Old 12-22-2008, 05:06 PM Thread Starter
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Originally Posted by FordGuy100 View Post
Well unless someone swapped in that 7.3, that year should have a 6.9 in it.

And top end like powerwise, or like actual topend (like what someone would refer to on a dirtbike or something)?
ya sorry about that figured out it was a 6.9 couple days after i posted. Someone told me it has no top end i think he meant like it loses all power at the top end i think is what he meant
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post #5 of 8 Old 12-22-2008, 05:14 PM
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fuel milege will have a couple variables like what condition the engine is in. Also what trans and gears does it have. I had a 1983 6.9IDI with a manusl 4speed and 4.10 gears and I never got over 8mpg but the engine was worn out. I also have a 1994 with a 7.3IDI which is the exact same as the 6.9 just bored out more, it has a 5speed over drive with 3.55 gears and the engine has 120,000 very hard miles on it and even with the injection pump turned up I still get a consitent 17mpg.

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post #6 of 8 Old 12-22-2008, 05:18 PM
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i had an 85 years ago with 7.3L out of an '89. i got about 15 - 16 mpg with a little bit of effort. it was 2wd with a 3spd auto with 4.10 rear.

if you see a light at the end of the tunnel, it's probably just a photon torpedo
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post #7 of 8 Old 12-23-2008, 12:48 PM
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Yeah mine has a T-19 4 speed tranny (no overdrive) and 3.54 gears. The worst I've gotten was was 14mpg towing a boat over mountain passes, and the best was 19.7mpg. I usually get around 16mpg

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

2004 Jetta TDI 5 speed
2004 2wd Excursion Limited 6.0. Testing how loyal I am to Ford
1997 Passat B4V TDI. 1 of 80 imported in 97. 50 MPG and a factory 25 gallon fuel tank!
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post #8 of 8 Old 12-29-2008, 05:46 AM
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Quote:
Originally Posted by JTA View Post
I also have a 1994 with a 7.3IDI which is the exact same as the 6.9 just bored out more, it has a 5speed over drive with 3.55 gears and the engine has 120,000 very hard miles on it and even with the injection pump turned up I still get a consitent 17mpg.
that's goods news for me, I'm thinking of buying a rig like that...125,000 miles, most of which were local pulling heavy equipment (current owner is a well-digger)
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