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D 15 HP

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ACinSC View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ACinSC Quote  Post ReplyReply Direct Link To This Post Topic: D 15 HP
    Posted: 01 Mar 2018 at 1:45pm
Is the HP the same for gas and diesel ? I'm thinking I saw somewhere that a gas Series 1 is a little higher . THANKS !!
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Stan IL&TN View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Stan IL&TN Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 2018 at 2:12pm
In the Nebraska tests the gas was a little higher than the diesel but so was fuel use.
1957 WD45 dad's first AC

1968 one-seventy

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Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 2018 at 3:08pm
I think it was typical for a gas to have a little more HP but the diesel had more torque. In the end they performed about the same.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 2018 at 4:00pm
Series 2 gas was raised to 46 HP and the diesel never was raised....it was still at 36 HP.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tireboy Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 2018 at 7:29pm
It all depends on what horsepower your looking at.  Nebraska test # 635 for the gas tractor rated drawbar hp is 36.77 rated belt hp is 46.48 and maximum belt hp is 50.34. Test # 636 the diesel tractor rated drawbar hp is 35.87 rated belt hp is 45.52 and maximum belt hp is 51.14.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tireboy Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 2018 at 7:32pm
I made a mistake those are 17 specs i posted.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ACinSC Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 2018 at 7:38pm
So the drawbar HP for a gas Series 1 is 36.7 and the diesel is 35.8 ? Makes sense that the diesel would have more torque . We have both , but the gas one's still not quite up to snuff . THANKS !!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tireboy Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 2018 at 8:01pm
D15 Nebraska test # 795 gas tractor  max drawbar is 35.33 hp rated drawbar is 28.33 hp max PTO is 40.00 hp rated PTO is 33.85 hp. Test 796 diesel tractor max drawbar is 33.32 hp rated drawbar is 26.53 hp max PTO 36.51 rated PTO is 34.36
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AC720Man Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 2018 at 8:10pm
Torque provides more power than hp. My 2007 Ram truck makes 315 hp but 650 lbs of torque. A Hemi makes 425 hp but around 325 lbs of torque. My bet is on a diesel every time. With that being said, our dad’s series II D-15 amazes us with the amount of pulling power the little power crater engine makes.
Can’t go wrong either way, unless fuel economy is a priority. The diesel wins hands down.
1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD
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Post Options Post Options   Thanks (0) Thanks(0)   Quote AC720Man Quote  Post ReplyReply Direct Link To This Post Posted: 01 Mar 2018 at 8:12pm
And yes, 46 hp on the gas is correct, not sure about the diesel.
1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ACinSC Quote  Post ReplyReply Direct Link To This Post Posted: 03 Mar 2018 at 6:58am
Wonder what it would take to bump a Series 1 gas D 15 up to 46 HP ? Can a 149 cubic inch be bored out to 160 ? Just something for me to think about . THANKS !!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 03 Mar 2018 at 7:09am
You can't get to 160, but I think after-market with 8 to 1 compression will get you to 155 ?? You still need a series 2 carb which is similar to a WD45 Marvel.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ACinSC Quote  Post ReplyReply Direct Link To This Post Posted: 03 Mar 2018 at 9:41am
Thanks , Dr Allis . Something to consider down the road .
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