Quote:
Originally Posted by zed512
what are the engine risks of running K&N type filter? you need to spray them right, wash frequently etc?
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Nothing other than maybe letting them get too dirty and over oiling when it’s time to refresh the filter(s). Oil can get onto the MAF from over oiling and cause it to measure incorrectly. I haven’t had an issue with either. Some cars’ filter will get dirtier faster, so it’s a good idea to check from time to time. The Lotus I have to clean every 3k miles. The DD is about 7500, IIRC. M3 I have no idea yet. I only have 1700 miles on the car. lmao
Quote:
Originally Posted by CanAutM3
Thanks for taking the time of doing this and sharing the results .
I wonder how much comes from the K&N and how much comes from the charcoal filter removal.
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You’re welcome.
That’s an interesting question. If I had the time, I could have done it. I’m trying to remember how thick the fibers on the charcoal filter are. My guess would be maybe a third or half of the gains?