1979-1993 & 94 Conv [Subscribe to Daily Digest] |
I'm the biggest fan of cooling the entire engine compartment! 50 v. 80 is a good point, but anything out of the compressor is going to be hot (relative to outside temp) and it's the job of the IC to cool and cram more air molecules into the chambers. Out side ambient temp plays a HUGE role, but it's still the job of the IC to cool compressed (hot) air before it enters the manifold.
The discussion really revoles around moving versus stopped. On the move- an open set-up is drawing air that is maybe 2-3 degrees warmer than the air coming over the well heated wheel well. I know because I ran my own unscientific tests with a gauge. And hot air leaving the compressor is NOT 2-3 degrees hottter- it's not a direct relationship. If you were able to cool incoming air below the outside temp (temp cooling the IC)- this would (over a long period and probably in a lab) have a direct reduction in air temp after compression (and only to a point).
At a stop- both set ups suffer;
Out side filter: Sucking hot air from (behind) a heat soaked IC.
In side filter: Sucking hot air from (above) your left steaming wheel-well (all of that braking/tire friction).
Even the guys that pipe air in from the front panel complain about heat-soaked perf. loss. The only way it goes away is to start moving- get air flowing over the IC (or use a fan).
And we can debate air density- So I agree, more=cooler will combust better, but I feel (no tests here) that the unrestricted open set-up draws better than closed, and therefore makes up for any intake heat increase.
Cooling after compression is the fight we need to win. So... RookieSPG it's up to you- might as well start saving for water injection!!!
Oh yeah- the K&N makes the car sound a bit more gutty out the pipes- nothing too crazy.
Steve
posted by 4.36.12...
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