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Old 10-01-2019, 05:20 AM   #28
maytag
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Join Date: Mar 2018
Location: Utah
Posts: 2,448
Quote:
Originally Posted by M9G View Post
There certainly are alot more contributing factors, I once took my ST mondeo to a rolling with a performance cone filter on and was down on power, rolling road guy told me to put original airbox back on with a decent filter which I actually still had in the boot of my car, I put it on and went back on the rolling road and performance went up. So yes a performance filter can have the opposite effect.

One key factor with the more air statement is "cold air"

I watch alot and I mean a lot of American mod programs and I cringe every time I see a beautifully modified car with a cone filter added into the engine bay sucking in lots of hot air
You're right, but it's the same thing. Cold air is more dense than hot air, and that's why it matters. If you've got a liter of hot air, it has less oxygen than a liter of cold air. Less oxygen = lower cylinder pressure.

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