Spring is here and I guess it really is the loony season. I hear people going on again about cold air intakes (which aren't really cold) and K&N's (which are a guaranteed ticket to short engine life and don't work anyway), and if I had any hair left I'd pull it out. For those who care about actual engine science, this is real
science, not the marketing crap spewed by K&N and other manufacturers of BS filtering products:
https://www.sciencedirect.com/science/a ... 7316301475
To save you a little browsing, here's a snapshot of the manifold pressure drop for OEM vs K&N, along with the researchers' comments. Surprise surprise, forget better breathing:
That's probably due to the large cross-sections of the K&N "fibers" creating aerodynamic disruption, but of course it's a direct contradiction of all that happy marketing misinformation. Now here's the unsurprising part, no filtration worth a nickel:
Consider for a moment that your engine digests 9,000 gallons of air for every gallon of gas. That's 45% more utterly unnecessary crud eating up your precious rings and cylinder walls. I won't even go into the fact that with a K&N cone, now you're picking up hot radiator air instead of the nice, cool breeze from your grille delivered by the OE setup. AZ and others here have already made that point better and clearer than I would. The point is, unless you're going to go full-custom hood scoop, don't bother with the induction because the aftermarket solutions will cost you ponies and not add them, and send your engine to the JY early to boot.