Re: Adding water to fuel

Posted by Brandon on July 30, 2002 at 19:12:40 from (209.115.126.65):

In Reply to: Adding water to fuel posted by Sonny Freyholtz on July 30, 2002 at 18:19:22:

Some of the older tractors did this by water injection. The two that I know about are the John Deere D, and the John Deere GP.

The main purpose of injecting water was to prevent preignition for the heavy fuels like kerosene or distillate. It cooled the cylinders enough to allow them to work.

However, a byproduct of the water injection WAS a little more power. The water would cool the incoming fuel slightly (which is good), and the water would also "fill" the cylinder more than just a normal intake of fuel, so that made more power.

Some tractors may have had a separate water tank, but I know the model D just took it right from the cylinder block. My grandpa says he used a lot of water in his D when plowing!

And, as M R mentioned, many high performance piston engined aircraft of World War Two used injection to create boosts of power for short periods of time (called "War Emergency" power). American aircraft usually had water injection. Germans used a mixture of methonal and water.

I am not an expert on the water injection subject, but this is my understanding on the subject. If I am wrong in any way, someone please correct me!

Brandon

• My Industrial John Deere website

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