Welcome to the forum I have been using [email protected] Cone Filters for years on different brands of cars some manufacturer claim a up to 7 Hp increase. Well I can not say if that is true or not but on every car I installed them it seemed too me that the car had a better throttle response because of the air flow over the stock filter. Of Course if you like the "Whoooosssh" Sound that improves over the stock air filter too.:grin::grin:
After reading many other posts about aftermarket air filters; K&N, Green. I have decided to steer clear of them. All the talk of problems with potential MAF contamination and debate on their improvement to performance has left me with enough doubt that I'm gonna stay with conventional air filters and change them every 3,000-4,000 miles. I am quickly learning that if it ain't broken, don't fix it.
I have a story for you
Bought my 2009 SLK55
Put greens in em
after a little while, I got a CEL Check engine light
Took into service
Needed a new MAF
The green filters disintegrated. Fortunately the MAF stopped the pieces from getting into the engine
This was back when they had issues with a bad batch of green filters
I read somewhere that you can hear the blow-off valve more clearly with a CAI setup. mainly because you are venting the excess pressure into open air rather than back into the main filter housing.
I believe I also read that in order for the CAI to work at its peak, you need to remove the baffle in the duct just before the air gets to the supercharger. also makes the supercharger a little louder.
I think there's little doubt that K+N style filters allow substantially more fine particles to pass compared to good quality paper - and that as the 'sticky' oil gets full, like a flypaper, an increasing amount of dust will pass through the intake. Does this matter?
Back in the day when I used to sponsor race bikes, carburettored, with open bellmouths, our mechanic was convinced (and convinced me) that over time, this sandy dust was abrasive enough to erode carburettor slides and jets, and even the bores and valve seats. Didn't matter that much on engines that were routinely run to destruction and rebuilt. Do I want fine sand entering my AMG engine, lovingly nailed together by Dennis Specht and designed to run to fine tolerances for many many years? Not so much...
With paper elements, the more clogged they get, the more dust they trap - not so with oiled filters. So I'm with SEACHAMP; use a recommended paper filter and change them frequently. I've taken filters out of my 55 which appear to be very clean, but once changed, the engine performs noticeably differently - namely more aggressive creep at idle, more responsive to throttle and interestingly, less soot on the rolled edge of the tailpipes, which I clean at every fill-up. As a matter of fact, I use that soot as a major determining factor as to when to swap the filters.