Intake Precooler for Forced Induction

[Inane]

are you talking about water spraying (onto the intercooler etc?)

I was referring to water Injection into the pipe just before (or just after) the intercooler, under pressure

[Monsterbishi]

Water injection would be quite efficient. But a CO2 system has other benefits.

Water injection can't suppress detonation but keeping temperatures down, but ulitmately is unlikely to reduce charge temps below ambient. CO2 systems are potentially capable of reducing charge temps to the negative region...

The last thing you want to do is reduce the charge temps that much, below a certain temp that is well above zero, the fuel injectors can't atomise sufficiently, and cause some very uneven burning situations. Last thing you want is fuel just pouring into the engine along the inlet manny runners.

All things said and done, water injection, and intercooler spraying ultimately function better than CO2 will.

[Chickenman]

True that.

But with C02 you can hava a purge!!!!!

And pretend you got NOS



Not

I do think for ease of use a CO2 intercooler cooler can't be a bad thing before a run. Especially if you got a MR2 with a stinkly located I/c.

[Stealer Of Souls]

http://www.are.com.au/Big%20HP/Dry%20Ic ... ooling.htm

Okay check that link out. This is an aussie crew which have developed and run dry ice coolers. Basically, with the right ECU and engine setup the engine can use negative temp intakes... Have a GOOD look at that site. It's got some good info.
I think you'll find that the "ideal" temps are for road driven cars, using standard run of the mill stuff. If you set the car up you can do some pretty impressive things.
And I never said you could/would use it on the road.

Also. I don't think (but don't know) that water injection can get charge temps below ambient. At ambient, air would saturate pretty fast. Water injection does have the bonus that during the compression cycle any left over vapour would evapourate reducing in cylinder temperatures and preventing detonation. But if the intake charge was cooler anyway you'd be less likely to suffer detonation.