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power Problems

Old Mar 5, 2012 | 09:13 AM
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power Problems

I have a 1989 f-250 with a 7.3L diesel. No turbo.
I never get any black smoke no matter how hard I pull or throttle it.
I am only getting 10-12 mpg.
I was told this eg. should run around 3000rpm. I don't thank that is right.
How can improve this fuel mileage? I have already tried fuel additives.
And where is the horsepower (rpm) on this engines.
 
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Old Mar 5, 2012 | 09:40 AM
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what gearing and tire size are you running.

i would think keeping the rpms down closer to 2000 would improve mileage
 
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Old Mar 5, 2012 | 09:46 AM
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GEARS AND TIRES

The tag on my rear end says 355
My tire size is 16x235/85
I was thinking I running my eg. way to fast also.
 
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