K & N or no?
06-16-2018, 04:11 PM
#2
Archive Gatekeeper
Rennlist Member
Rennlist Member
No.
06-16-2018, 04:53 PM
#4
Rennlist Member
No. Two reasons:
1.) The K&N, If not carefully cared for, can actually pass more dirt through it compared to the stock filter.
2.) Porsche thought through the entire intake through exhaust and there’s not much or any benefit to upgrading the air filter.
1.) The K&N, If not carefully cared for, can actually pass more dirt through it compared to the stock filter.
2.) Porsche thought through the entire intake through exhaust and there’s not much or any benefit to upgrading the air filter.
06-16-2018, 04:57 PM
#5
Three Wheelin'
The traditional knock on the Oiled filters is that it will interfere with the MAF sensor hot wire. I believe it’s a non issue in older models without a hot wire.
Edit: and what Murphy said above,
Edit: and what Murphy said above,
06-16-2018, 06:04 PM
#6
Team Owner
In addition to whats been posted above,
the knn filter also leaks dirt around the edges ,
(look at the lower aircleaner housing at the next knn filter you remove, bet you find sand in the oily areas.)
and thus allows more fine particulate into the combustion chambers.
Best bet for max performance and engine life use the stock filter with the hump facing the sky.
If you have to spend money on the car ,
then buy a new set of shocks ,
this will do more for the car than any air filter ever could
the knn filter also leaks dirt around the edges ,
(look at the lower aircleaner housing at the next knn filter you remove, bet you find sand in the oily areas.)
and thus allows more fine particulate into the combustion chambers.
Best bet for max performance and engine life use the stock filter with the hump facing the sky.
If you have to spend money on the car ,
then buy a new set of shocks ,
this will do more for the car than any air filter ever could
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06-16-2018, 07:24 PM
#8
Three Wheelin'
Yes, but if you order now you can get a free hat!
Wait, I watched this link and it occurred to me that last time I ordered a Stock filter from Roger there was no soft **** or crushed cars included — what the hell man!
https://www.knfilters.com/mobile/2017_calendar_BTS.html
Wait, I watched this link and it occurred to me that last time I ordered a Stock filter from Roger there was no soft **** or crushed cars included — what the hell man!
https://www.knfilters.com/mobile/2017_calendar_BTS.html
06-17-2018, 04:35 AM
#10
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Many years ago I dynoed my 1985 928S Euro with stock paper filter, with K&N filter and without filter. No difference in performance could be seen.
Åke
Åke
06-17-2018, 05:22 AM
#11
Burning Brakes
Back in about 1994 - 1996, I was running a K&N on my 1986 900 Turbo bolted directly onto the air mass meter. I really liked the sound effects during acceleration when you could here the boost pulling air through the intake. Really gave me an appreciation for the importance of a well designed low-drag intake. That having been said, it did not destroy the air mass meter and it did not seem to improve the performance. Frankly, I would just keep the stock filter.
06-17-2018, 09:56 AM
#12
Rennlist Member
06-17-2018, 02:24 PM
#13
Team Owner
its the dirt that gets past it that you also dont see, stick with the Factory filter,
you will never lose a race because you have a factory filter
you will never lose a race because you have a factory filter
06-17-2018, 02:36 PM
#14
Rennlist Member
Back in about 1994 - 1996, I was running a K&N on my 1986 900 Turbo bolted directly onto the air mass meter. I really liked the sound effects during acceleration when you could here the boost pulling air through the intake. Really gave me an appreciation for the importance of a well designed low-drag intake. That having been said, it did not destroy the air mass meter and it did not seem to improve the performance. Frankly, I would just keep the stock filter.
Air falls into turbos...as odd as it sounds, they dont suck.
BUT...consider that if you can hear more, you are filtering less.
Yes, there are likely cars with too small of a filter to get enough filter surface area, but the 928 isnt one of them.
06-17-2018, 03:42 PM
#15
Burning Brakes
Actually, I ascribed the noise to the much less plumbing that also opened to the side of the wheel well that I did away with while I had the K&N on. Not sure, if it had anything to with the amount of filtering or not. The plumbing somehow attenuated the noise.
In any case, the motor is still in excellent shape and takes no oil and has perfect compression. So, the K&N did not appear to harm the motor. Then again, it's a completely different set-up than the one that goes into the 928.
In any case, the motor is still in excellent shape and takes no oil and has perfect compression. So, the K&N did not appear to harm the motor. Then again, it's a completely different set-up than the one that goes into the 928.