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Old 06-09-2004, 04:33 PM
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Info on Ford 300 I6...

Hi. my friend just got a ford f-150 2wd with a 300 CI I6. he wants to know what a safe rev limit would be, what the factory HP/TQ ratings are, and what kind of fuel milage should he expect? Thanks.

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Old 06-09-2004, 06:34 PM
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4000 rpm is about the max you would safely take it. fuel mileage is fairly decent for a truck with a six depending on gear ratio and what tranny it has. the six was only rated at around 150 hp in the 70's and it might have gone up since then
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Old 06-09-2004, 06:59 PM
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I own a '88 F-150 with the 300 I-6. I have done some research on the motor and found that mine should have about 180 ft/lbs of torque and about 150 HP, not that great. As far as mileage goes with a 5-speed i get between 9 and 14 miles to the gallon. I dont agree with Fordcrazy as for a 4000 RPM as the limit, I'd say about 5000 RPM.
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Old 06-12-2004, 08:02 PM
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I have owned a 1988 Ford F250 4x4 with the 300 inline 6 with 5 speed. Most of the year I get 13-16 mpg, but in the spring when it warms up above 70 degrees, for about a month, I get at least 16 and as much as 20 mpg! This has happened every year, and I have never understood why. By the way, it has about 320,000 miles on it, has never been opened up, and still gets about 2500 miles before it uses a quart of oil! And most of that leaks out of a bad valve cover gasket.
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Old 06-13-2004, 12:40 PM
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I drove an 89 F150 2wd King cab for about 5 years. It had a 3.08 rear ratio and a 5 speed. On a cross country trip, unloaded, it managed a rather disappointing 17 mpg.
It would rev to 4000, but all the power was in by about 3700. No point in revving it anymore.
A good solid working truck, it would happily pull just about anything you'd sensibly want a 1/2 ton truck loaded with and then some. But for stoplight to stoplight fun, be prepared to be outrun by almost everything except semi trucks.
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Old 07-05-2004, 02:32 AM
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Re: Info on Ford 300 I6...

Quote:
Originally posted by Mike_82
Hi. my friend just got a ford f-150 2wd with a 300 CI I6. he wants to know what a safe rev limit would be, what the factory HP/TQ ratings are, and what kind of fuel milage should he expect? Thanks.
is it an EFI, or carb'd version?
i have a '93 SWB reg. cab with the E40D auto and i get 20 MPG going 72mph on highway trips
in town i get between 12-15 MPG

the EFI engines make about 145 HP @ 3500 and 260 ft-lbs. @ 2000-2800, the carb'd versions lost about 30 HP, and about 25-30 ft-lbs

if it's a stock engine, don't even worry about the rev limit, the head doesn't breath well enough to reach it, but i will agree that it's about 5000 RPMs
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