With water injection, is a cold air intake worth it?

[miata_rp]

On a water injected supercharged car with .4 bar(6 psi) boost operating in ambient temps greater than 30 deg C, is it worth the time and effort to fabricate a cold air intake system to pick up air outside of the engine? Or will the water injection cool the intake air anyway? the engine bay registers over 75 degrees C temperatures most of the time.

If you can pick up, say 40 deg C air instead of the mentione engine bay air of 75 deg C, will it be worth the time and effort?

Thanks in advance

[JohnA]

35C is a hell of a temp difference, almost 10% in power terms :!:

[arz]

Cold air is cold air, who cares how you get it, I say "yes"

[20vK]

If you start off with even colder air, and then use WI it will be beneficial in a number of ways.

1. You will use less water, since peak combustion temperatures will be lower
2. You will get more power. Cooler intake air is more dense. (plus benefit of more reliability, with lower combustion temps)
3. You can turn up boost if using FI. If peak combustion temps are lower and still within acceptable range, more air and fuel can be introduced to bring combustion temps back up to a higher (but still acceptable) levels.

HTH

Rich