mhuppertz

Have 422k on the Cummins, most of them hard, and most of them turned up.

Starting to have a lot of blow-by and I have read that water injection can clean the carbon out of the ring pack.

I have a snow setup that was for a gasser, have adapted to boost with a GM MAP sensor, 5v reference, just haven't installed yet.

We used to revive carbureted cars by slowly pouring water down the carb until all the carbon was removed from the valve seats, worked wonders.

Anyone have any experience with this on a diesel?

mhuppertz

I will try it and see if it works.

gyman98

I used to run water/meth injection on a 2nd gen 12v years ago, when I blew the head gasket noticed it was sure clean inside. One thing though that's different is the snow injection systems just mist it in. High pressure and not a lot of volume.

Might want to play nozzles but I would imagine it's a fine line between just right and hydro locking

mhuppertz

I ordered a 325ml nozzle and a dual feed nozzle holders. That should be good for now. I had to pull out my valve cover crankcase vent because it was blowing oil all over at high boost. Studded it 20k ago and could still see the crosshatch, so am pretty sure the rings are just gunked up and need cleaning. This ought to do it.

gyman98

Be sure to report Back how it works. If nothing else you'll find a few ponies and lower your egt's

1972RedNeck

Straight water injection does not add horsepower.

gyman98

Sure it does, just not nearly as much as water/methanol. Works the same way a intercooler works, cooler air is denser. Dense air holds more oxygen which permits more fuel to burn.

gyman98

mhuppertz

Increasing the air density through the latent heat of vaporization and vaporization itself is one benefit of water injection, another is slowing the burn to get more usable work out of the combustion event with less lost to spiking pressures, blowby and heat.

It was used in WWII aircraft engines to increase horsepower very effectively.

Water adds power, no doubt about it.