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To clarify, if you have a system that gets cold air, you will get a gain of about 1-1.5% per every 10 degree drop of intake air temp vs hot underhood air. If you made that system a ram air, it would only improve about .5-1 percent total.
If you get the pressure change that the ram air creates, you can calculate the power gain easily and you will find the the air density is incresed more by dropping the temp than the slight gains the ram air makes. Of course Ram air is good and helps but its more important to get cold air by a factor of almost 2 in most cases. |
If it is your intention to actually add HP with an intake, it is better to actually draw "real" cold air , rather than suck "more" hot engine bay or radiator.
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I am thinking that an actual moving car might have less issues with the heat than a car on the dyno, even with a huge fan. More air moving around the car might affect airflow in this area to where it makes its full power. I htink someone here monitered the IAT with this intake under actual driving and found the temps to be good. I think to be fair to Stillen I'll dig up the nose off dyno chart and show that and let the readers make their own conclusions. |
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We need to put a dyno in a wind tunnel and run some tests.
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Oh well. It'll still be an improvement over just having bolt-on mods and no tune at all.
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Definitely.
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What I think we should do is to put a thermocouple in the area of the air fliters and see whats actualy going in when the car is being driven. Another thing I was thinking of is perhaps there is radiant heat transfer from the radiator. |
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Man I need these things. That is an astonishing gain. Those guys at Stillen DO IT RIGHT!!!
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