Quote:
Originally Posted by joshoisasleep
You mean strictly in terms of power right? If one wanted just to lower their EGT's an intercooler would still be a good idea?
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At 10psi the air temp is only about 80 deg C. If you've got an intercooler that can take 60% of the heat out (that's quite a good intercooler) then you're only dropping the temps by 40 deg C max. The density improvement is only 12% and if your intercooler has 1.2 psi restriction then you've gained no density increase.
But yes taking air from a cool place (diesel engine bay temps aren't that hot unless you're near the exhaust) is an excellent idea, as is insulating the exhaust so it doesn't heat your intake. Snorkles are counter productive unless you need one for wading. The extra length and restriction undoes any gain from getting cold air.
Simply taking the intake to the front of the engine bay and not behind the radiator will help the most.