water methanol injection

[blownrat]

Does anyone have any knowledge of the water methanol injection system, for cooling blower motors? Pros? cons? any information would be helpful.

[BGMAN203]

I have heard of water injection in blown gas motors, but not in blown alky motors. To my understanding alky motors burn real cool. Will actually frost over the blower. I know some guys that drag race with blow gas motors will inject water in the motor. But only 8-10 oz of water per pass, I wouldn't recommend anything like that on a lake motor.

[GEOO]

http://www.turboice.net/forum/
I run a system on my procharged 800hp small block.

[Unchained]

Originally posted by GEOO
http://www.turboice.net/forum/
I run a system on my procharged 800hp small block.
That site has some great info about water injection.
I ran a setup years ago when I ran the sand drags and it worked well for high boost applications. I just used a windshield washer bottle with a built in pump and it was triggered by a pressure switch set at 5 psi.
I had a .040 jet in the line and it pee-ed into the throat of the carb ahead of the turbo.
This looks like something I need to add on my current Turbo setup. Should let me run less octane fuel with high boost.

[blownrat]

thank you for the site infor. just dont know much about this sort of thing have to read up on it.:confused:

[gnarley]

Originally posted by Unchained
That site has some great info about water injection.
I ran a setup years ago when I ran the sand drags and it worked well for high boost applications. I just used a windshield washer bottle with a built in pump and it was triggered by a pressure switch set at 5 psi.
I had a .040 jet in the line and it pee-ed into the throat of the carb ahead of the turbo.
This looks like something I need to add on my current Turbo setup. Should let me run less octane fuel with high boost.
Where can you find an adjustable pressure switch in the 2-4 PSI range?

[Unchained]

Originally posted by gnarley
Where can you find an adjustable pressure switch in the 2-4 PSI range?
It's called a Hobbs switch.
I got one from Turbo City years ago but they're pretty common.
http://www.turbocity.com/
http://www.lonestarracing.com/cgi-bin/lonestar/N/W-16006.html

[dc96819]

http://www.aquamist.co.uk/
I used a aquamist system with distilled water and cant tell the difference between using water or alcohol.When the water is injected i could feel it holding back for a secound.Its cheaper then a intercooler and boost can be increased by changing a $10. part.Keeps your pistons clean.They have all the parts your looking for.

[gnarley]

I have found lots of info regarding the use of Water injection. If you want to, read for yourself about the possible benefits. It is also interesting to read about some of the power gains and losses through intercooling. It seems as though both Water injection and intercooling have great potential and when used together have tremendous gains.
This is something to think about!
http://not2fast.wryday.com/thermo/water_injection/opt_mass.shtml
What is the net effect of cooling and dilution? Take the previous two answers and multiply them out to get the answer, it's in the column labelled O2 Final. For hot intake charges, the effect is quite considerable, so you can readily see why water injection works so well on non-intercooled engines or those with marginal coolers.
As an example, using the 50% RH table, if you had a non-intercooled engine with post-turbo charge temperatures of about 200°C producing 200 WHP, you could inject a 16:1 air to water ratio mix and get 200*1.221 = 244 WHP.
Is there a charge density benefit from water injection? The answer is almost always yes. To answer this question definitively, you must examine the assumptions above and have reasonable input from them. For example, if your injector sprays the water stream directly on a hot part of the manifold, you'll see very little direct charge cooling effect, but you'll see a considerable increase in the H2O portion of charge volume. If this is bad enough, it can overwhelm the benefits, in very much the same way as running a turbocharger at a very high pressure ratio.
Lots of very technical links and technical data to read here with links http://not2fast.wryday.com/
http://www.carrollsupercharging.com/oldsite/gaseous/GI-01.pdf
http://waterinjection.info/documents/turbowhitepaper/waterinjection.htm
Chart below (see link below) shows the difference in temperature rise due to pressure. As the compressor efficiency drops, the density ratio also drops.
Even if you have a turbocharger that has 100% efficiency, there is still a density ratio drop of 15%. At 60% efficiency the density ratio falls by 30% !
http://www.aquamist.co.uk/rescr/faq/airmass/airmass.html