I agree. The 5.9 is an amazing truck engine. My numbers posted on the old Ford, 260/700 are to the ground and is considered a mild build. With two transmissions, a loss of 20% off the crank is about right, so 315/860 at the [email protected] rpm. And for the non believing gasser guys here is a dyno sheet and a small load, 29k gcw.
Not bad for a 47 year old truck that spent 20 years in the log woods. 13 years as a gasser and 7 as a diesel hauling heavy. To this day, I would put it against any new 1 ton dually hauling heavy in the log woods. On the big highway, not so much
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I know most of you guys like diesel, but I like my 2014 ford f-250 gas, 4x4. I only pull hay about 2 or 3 days a year. 14k dump trailer about 10 times a year hauling sand, gravel, and dirt. Horse trailer about 2 times a year. The rest of the time, it is driven to town for parts, lumber, feed and other stuff. On the farm, it is my tool box. It is what I wanted and needed. Gas? yes, but I don't have to have any more hp and only drive a total of about 5,000 miles a year. Would I want diesel? Not for me. But I do think Ford lost their mind in the brakes on my truck. I understand that the front brakes on a 2014 diesel has larger brakes and therefore a larger tow due to the ability to stop. I like to go, but I love to stop.
So... whats up with your very odd power curve there? Most Cummins 5.9's will build power out nicely to around 3000 rpm. Yours only peaks at 1800 and goes down from there? 260 HP is nice for an old 12v, but the curve is odd. Just curious.