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charlie n

Well-known Member
I put the decimal point in the wrong place.Please accept my apologies. The correct formula is max fwhp x .035=gals. per hour
 
Hey Charlie, now thats more like it. That would be at full absolute dead pull with my MF-690 with Perkins 4-236 and CAV pump. Thanks for looking it up as it is a useful figure now.
Tom
 
Different makes of engines the same HP have different fuel efficiency. For some engines it can be quite a bit of difference. Dave
 
I doubt if Charlie will figure it out.

7.2 lbs weight in a US gallon of #2 diesel.
A Deere 8320 made 18.93 HP-hr-gal at max rated. That would be 0.380 lbs fuel per hr per HP.
The 720/730 diesels were ahead of their time making 1799HP per gallon per hour or 0.400 lbs per HP per hour.
Best engine to date is a turbo two stroke marine diesel at 0.260 lbs per hp per hr.That's 27.7HP per gallon per hr.Over 50% efficiency too.
IF............you could wring 100% efficiency from a gallon of #2 at 129,500 btu per gallon.An "engine" would make 50.9 HP per gallon per hour.
So 37.2% fuel efficiency on a farm diesel while running all those accessory loads and emissions equipment ain't shabby.
 
(quoted from post at 07:21:04 12/13/10) I put the decimal point in the wrong place.Please accept my apologies. The correct formula is max fwhp x .035=gals. per hour
Click to expand...

That's almost to the "T" for what my little tractor does and what a couple people said their 724 does. Now I have a little something to use when contemplating.

Thanks, Dave
 
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