1086 injection pump timing

I had the pump rebuilt on my 1086 this past spring
when I put it back together i timed it on 18 deg
it cranks good and has good power but it really burns the fuel
I have read that the later 1086's were timed on 15 deg
my tractor is a 1980 model could that difference in timing make it harder on fuel
Thanks for ant information
 
Timing would make little difference on fuel usage. I would leave it at 18 degrees. Moving to 15 will take power away and make it more likely to wetstack when idling. Your tractor is probably just running like it should be. Before you rebuilt the pump I'm guessing it lacked power and now its running strong. Power takes fuel. Only other thing is maybe the pump shop screwed up the pump settings and now it is putting out way more power than its supposed to using more fuel.
 
Nope,

It is supposed to be at 18°.

Have you replaced BOTH air filters? If that inner filter is plugged, they will suck fuel like crazy.

Allan
 
I replaced both airfilters when i had the injection pump rebuilt
when I had the pump rebuilt I told them I wanted the pump turned up to the max safe level so that may be my problem

The reason I am asking about the fuel
we burned around 70gal getting 10 ac of corn land ready to plant
this spring
I have herd the tractors were pretty hard on fuel anyway though
 
When my 1086 was new and set by the factory I was pulling a 6/16 plow at 5 mph burning almost 5 gal per hour. About 145 HP.

I turned up the fuel to get 175 hp and pulled that plow 6.5 mph. Burned about 6.5 gallon per hour.

I used about the same gallons of fuel per acre to plow but got it done faster.

If you are pulling the 1086 hard and the fuel is turned up it could burn 8 gallons an hour at 200 hp. I did that for awhile but took the hp back to 175 cause I couldn't get the hp to the ground. Too much spinning.

How many trips did you make to get that 10 acres ready?

When I plowed, disced, field cultivated and planted, I would burn about 4 to 5 gallons per acre.

Gary
 
Forgot to mention if you look in the Nebraska test the 1086 was one of the most efficient tractors tested for it's HP range.
 
I have to disagree, if you can bump the timing, you lose some torque at lower RPM, but you make more power at the top, with the same fuel. It's common with the VE pumps on the 12 valve Cummins to advance it til the pump hits the side of the head.
 

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