Screw Your Fuel Economy

Mechanical Knowledge

“Y’all ever wondered why diesels are so loud, especially the old mechanical ones? This is why… the injection system! This P-8600 is like a mini engine pumping out almost 1200cc of fuel. It’ll be bolted to the side of an IH pulling tractor and tearing up the track this spring!”

This is a mechanical fuel injection pump that is going on a high horsepower Pulling Tractor.

Get a load of how much diesel it is dumping in just a few seconds.

I looked it up so you don’t have to.

1200 CC’s is 0.3170074 of a gallon, so almost a third of a gallon.

I couldn’t even guess how much money that thing cost to build and test.

Leigh might have a better idea.

It will give you a better understanding of why they belch so much black smoke at full throttle.

6 thoughts on “Screw Your Fuel Economy

  1. I had an 84 Toyota NA Diesel pickup. Top speed was 74 Mph. It had just under 200k miles when the injector pump went out. A Mitsubishi injector pump was used as a replacement. It was much louder. Fuel milage dropped from 40 Mpg to 35 and it would run up to 82 Mph. When the second AC system failed on it I traded it.

  2. not much to build, its all in the tolerances as to the fuel output. the test stand probably goes for about 200+K. i could BUILD one for 500 bucks. testing and timing one on a test stand is another matter.

  3. Just to give an idea. An injection pump for a small 6 cylinder generator, 99 kilowatt, is about $2500 new. That’s for the same size John Deere engine that goes in one of their corn harvesters. At full output it uses 120 gallons of fuel in 24 hours.

  4. A buddy, diesel mechanic, pulled his Oliver 77(?) at the fairgrounds regular. Fuel=Power in a diesel he would say.
    His tractor would black the crowd when he pulled and he would state, “Im rollin coal”
    Good times!
    Mc

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