Have a 69 n600(about 30 years now) with a 14ft grain box. Using to haul small square bales of hay now, about 3 tons of hay. Just put in a 360 out of a 75 f350. Kept the same carb form the orginal 330 fuel mileage around 5 to 6, is that about in the area. This is the 3rd engine in 30 years others ran about the same mileage. Thanks

 

As you know, mileage would depend on what speed you drive, gearing, hills, and weight. So, 5-6 sounds ok. My 70 F600 with a 428 gets 8-10 MPG @ 55 MPH. It has a service box on it and it weighs 14,000 lbs. If I remember correctly, it has something like 5.80/7.40 gears in it and 10R-20 rubber. Most of my driving with it is on flat ground at sea level so it never has to work to hard.

 

C600 with a 330/Allison - My mileage varies from about 3 to 5 depending upon the load. You can literaly watch the fuel gauge drop when hammer down going up hill, but then loaded, I might be at 6-10 mph up the one steep hill so it takes some time.

But unloaded (which is rare) at about 54 mph it seems to go a much longer time, in fact I would guess right around the 8-10 mpg range.

I imagine a diesel would do much better as well as being faster, but at 7 miles each way, it would take many years to recoup the cost, in fat I mght not live that long! Of course once my project is done, until I get the next one, the C600 is going to be sitting a lot as I use it in a non commercial manor.

David

 

First, after driving a while, check the plugs and make sure it's not running rich.

Second, the Ford 2bbl (if that's what it is) is notorious for being a fuel hog.

You MIGHT wanna try getting a 4bbl intake (cast iron stock would be cheap) and using a 4bbl 600cfm Holley with vacuum secondaries.

If you can get the thing to run on the primaries only at cruising speed, you MIGHT pick up a few MPGs.

 

instead of MPG you might want to think HAY BALES per gallon ?

 

In my case it is tons per gallon, you have to look at the big picture here. In my case, I can haul 4 times as much 5/8" gravel in the C600 than the F250, even if I only get 3 miles per gallon, well at 7 or 8 with the F250 I am way ahead with the C600 in X gas used to haul X tons.

Both are "dump" trucks, so unloading is the same, but as a plus I don't have to leave the drivers seat on the C600 to release the tailgate, whereas I have to leave the cab of the truck to manualy open the gate on the dump insert in the F250.

Same I imagine with Hay hauling, I imagine the N600 probably can haul a considerable amount more than a pickup. I would, uneducated in the hay hauling business that I am, hazard to guess it is about 4 or possibly 5 times the amount in a pickup, so it really works out advantage large truck.

I am comparing Gas vs Gas here.

David