Quote:
Originally Posted by SpeedR
And why would you bother if colder air dose not make more power?
and now were done troll  |
There are other ways to cool the intercooler. Mitsubishi Evo have used water/methanol sprays for example. You're confusing two different effects.
If you can cool the compressed air then gains are possible. If you merely start with cooler air and then compress it there are no significant gains to be had in a modern knock limited engine.
Intercoolers cool the compressed air from very high temperatures before it goes into the combustion chamber. Direct fuel injection cools compressed air inside the combustion chamber, again from a very high temperature. Both reduce the tendency to knock and therefore develop more bmep and more power. Starting with "cooler" air doesn't make enough difference to the temperature of the compressed air. At least that's what I say. I'm too lazy to do the Boyle's Law math and I don't know what the ignition advance mapping actually is in these engines. I predict no power differences between this engine at plus 40C and at minus 40C but I'm open to the idea. My actual point is it isn't as simple as colder air = more O2 per unit volume = + more fuel injected = more power. In the olden days, probably before you were born, you could feel this difference. Now it is imaginary.
You need to appreciate the difference between intercooling and CAI "cooling".
NOW we're done, unless you have any interesting ideas.