Re: Performance upgrades on a 997 S ?
Quote:
Gnil said:
I have a K&N filter..should I be worried ?
Only if you plan to keep your car for a while . Lol
Why do you think K&N put a big warning on the filter not to use it when it's raining, or at lower outdoor temperatures and to clean and oil the wretched thing every other week?
A clean, freshly oiled filter is ~30% efficiency (at best) which means that 70% of air borne dirt(@3 microns or smaller) goes past it .And it gets progressively worse as the filter surfaces get coated with dirt .
A paper filter on the other hand starts at ~85 -90% efficiency and gets BETTER , the dirtier it gets .
Use the oiled filter for an afternoon at the track if you really need an extra 3-5 hp , but not on a daily driver .
Do a web search on OIL SLUDGE and you'll see what can end up in your engine .