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Discussion Starter #1
Want to replace the paper filter with a K&N filter or similar (OEM shape, not whole new cold air intake). Is it worth it? Will it allow loads of debris into my engine and give me grief later on down the line. Or is it the best thing I could do?
Also looking at swapping the spring in the blow off valve, decrease the lag, good mod for cheap or not worth it? (Again more concerned about the fragile engine)
Any advice appreciated
 

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Aftermarket filters surprisingly are more restrictive but offer greater surface area to make up for it. This ensures you get lots of clean air. I doubt you will see an increase in power, might sound a bit louder though.
 

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Discussion Starter #3
Aftermarket filters surprisingly are more restrictive but offer greater surface area to make up for it. This ensures you get lots of clean air. I doubt you will see an increase in power, might sound a bit louder though.
Yeah I’m torn, not fussed about power as it’s nice and nippy. The sound would be cool, but I’m worried about the particles and crap getting in. It’s the toss up between more air in, more crap. I guess the OEM is probably the best idea, but would like someone who’s had an aftermarket filter to say, “yep had one for five years and when I/mechanic checked engine said it’s as clean as they come”. I’m now looking at cotton ones
 

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I have used them for years on 2 different modified cars with no issue at all.

My own opinion (FWIW) is that if you stick to well known brands they (kind of) wouldn't still be around if they didn't do what they say they do.
 

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I have used them for years on 2 different modified cars with no issue at all.

My own opinion (FWIW) is that if you stick to well known brands they (kind of) wouldn't still be around if they didn't do what they say they do.
What type are you using? I’m torn between K&N or ITG foam, but open to suggestions
 

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I'd be quite content using a K&N drop in filter on my 56S and likely will do so, and did on my R53 initially, and my R50, also my classic. I also have a foam ITG in my R53 now, I have a Ramair foam baseplate type filter for my classic that was in use for many years after the K&N, foam degrading now but would replace it, it'd still be usable but the shape doesn't return as it should, it's a bit gooey to handle when the exposed baseplate type anyway, still it was effective enough and can't say it caused any problems with dirt ingress, it was well oiled though. I use foam socks now on my classic, these also degrade over time, and being a finer foam suffer it earlier than the heavier type for whatever reason, less structure to them I guess, so much so after a few years it sucked one of the little buggers into the engine 😂 even these I've gone with again, now in their third year I can feel they're not quite so firm, so my advice would be avoid the fine foam items if concerned perhaps. In an enclosure though I expect they'd do better. I did notice a small difference using the K&N drop in cotton filters on the old and new cars, I don't believe they could be considered a waste of money, the intake systems I suspect are though when the price they are, the manufacturers are taking the piss with pricing imo.
 
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Discussion Starter #9
I'd be quite content using a K&N drop in filter on my 56S and likely will do so, and did on my R53 initially, and my R50, also my classic. I also have a foam ITG in my R53 now, I have a Ramair foam baseplate type filter for my classic that was in use for many years after the K&N, foam degrading now but would replace it, it'd still be usable but the shape doesn't return as it should, it's a bit gooey to handle when the exposed baseplate type anyway, still it was effective enough and can't say it caused any problems with dirt ingress, it was well oiled though. I use foam socks now on my classic, these also degrade over time, and being a finer foam suffer it earlier than the heavier type for whatever reason, less structure to them I guess, so much so after a few years it sucked one of the little buggers into the engine 😂 even these I've gone with again, now in their third year I can feel they're not quite so firm, so my advice would be avoid the fine foam items if concerned perhaps. In an enclosure though I expect they'd do better. I did notice a small difference using the K&N drop in cotton filters on the old and new cars, I don't believe they could be considered a waste of money, the intake systems I suspect are though when the price they are, the manufacturers are taking the piss with pricing imo.
Yeah I think for the gains it’s not worth the money by the look of things, for a £500 cold air induction. Better off splashing out on an upgraded Intercooler for that sort of wedge. I’m taking it to an mini specialist in Preston on Monday, so I’ll see what they say. Just worried about throwing anything at my N14 that isn’t standard in case it buggers it up!
 
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