[blownoiler]

Originally Posted by TimV

I was looking for water methanol injection, but on this site, nobody seems to have that install on a diesel, so i find nowhere proof if it actiually give a gain in fuel efficency.

There is a lot of info for gaining extra power, but i need a verry small nozle to give a verry low percentage of water/methanol per fuel when i accelerate.
Not a hole lot of water/methanol when you gun the trothle...

Then an other problem, the smallest nozzle i can find is a 50cc nozzle.

I drive 45 minutes to work, that is 40 km. The first 5km is with a cold engine, so no injection.

I P&G, so assume that i inject a bit more then half the time i drive. Make that 30 minutes for 40 km, for easy calculations.

I can drive 1200km on one tank. So injecting 900 minutes.
Smallest nozzle was 50cc, lets say it injects 60cc.

60cc/minute x 900 minutes = 0,06l/minute x 900 minutes = 54 liters.

Thats a hole lot of water, if you compare that i only burn 72 liters of diesel in that time.

So a smaller nozzle is needed or is this a correct volume of water injection?

Is there sombody who can tell me where i can find the info that i aim looking for?

Thanks

Water injection is mostly used on gasoline engines, it allows them to run a higher compression ratio and/or more ignition advance without incurring detonation. It could be used on a diesel engine for economy gains in theory, by allowing more injection advance without the attendant high pressure/temperature spikes, but setting up such a system would require a retune which costs dollars. The addition of methanol/water injection to a diesel can give a boost in power, but the methanol/distilled water costs money so dollar economy goes down mostly.