methanol injection

Charrlie_S said
I don't agree. Water/meth injection is not used to cool the intake charge, it is used to suppress detonation. If you do not have detonation, the injection system will take power away, by displaceing the oxygen and fuel reaching the cylinders. Water doesn't burn, and meth has less heat(power) content then gasoline. You would have to have a VERY high compression ratio on a normally aspired engine, to benefit from W/M injection. However it does work well on boosted applications, IF IT IS TUNED PROPERLY. It is not plug and play.

Someone posted about nitrous, and CO2. That can be used to spray an intercooler, but do not let it get into the carb. CO2 will not burn and will cost HP. N2O will lean the mixture, and cause internal engine damage, if fuel is not added, also.

Shaker223 said
Water/Meth gives a cooling effect to the intake charge thus suppressing detonation. The mixture (finer the better because of more surface area of the individual droplets) absorbs the heat (cools the charge) out of the incoming air charge and in turn reduces the tendency for detonation.

Actually you are both partially right..
although the water injection does provide a slight cooling effect from the atomization, its main purpose is to suppress detonation. While I don't think it would help a regular engine (non high compression) I don't think it will hurt it unless you sprayed a BUNCH in.

Also good point about not getting the CO2 and N2O into the engine... You are better off with a water to air intercooler at that point. or just using a N2O shot (with the appropriate fuel mixture of course).