Orange Posted March 12, 2019 Share Posted March 12, 2019 Hello, I am new to Caterham ownership so any advice is welcome!Has anybody fitted a K&N air filter to their car?Looking on the K&N website there are several that could fit, is there tried and tested part?My car is an SV with the alloy inlet manifold if that makes any difference.Many thanks Link to comment Share on other sites More sharing options...
revilla Posted March 12, 2019 Share Posted March 12, 2019 Yes.The RU-1480 fits nicely. I has an angled neck so sits slightly differently to the Caterham filter but it keeps it clear of the pedal box etc.Here are some pictures (also in an SV with the alloy inlet manifold so a good match for your car): Link to comment Share on other sites More sharing options...
Orange Posted March 12, 2019 Author Share Posted March 12, 2019 Brilliant and thanks for the photos. Did you notice any difference in performance or noise over the standard Caterham foam one?The main reason I am considering changing it is that it is probably original and it has a couple of surface nicks in it and not necessarily performance. Link to comment Share on other sites More sharing options...
revilla Posted March 12, 2019 Share Posted March 12, 2019 Performance - I haven't done any back to back runs on the rollers but it's certainly not hurting the power much from the results I got on the rollers with it fitted (in my signature). Subjectively I can't really feel a difference.Noise - I think it's a bit noisier, got a bit of an induction roar to it at lower RPM that it didn't have before and a bit louder throughout the range bit not massively so, sort of snarls - I quite like it! My car is a VVC and that system dials out most of the cam overlap at low RPM and throttle so you might get different results on the low RPM induction noise on a non-VVC engine.I changed mine because I got fed up of the foam ones getting tatty and coming apart around the glued seams. It certainly seems to be holding up better. Link to comment Share on other sites More sharing options...
Orange Posted March 12, 2019 Author Share Posted March 12, 2019 Thanks again. Ordered one! Link to comment Share on other sites More sharing options...
revilla Posted March 12, 2019 Share Posted March 12, 2019 Let us know how you get on.wirh it. Link to comment Share on other sites More sharing options...
Wrightpayne Posted March 12, 2019 Share Posted March 12, 2019 Andrew,Will that fit the TB on a plastic plenum? RegardsIan Link to comment Share on other sites More sharing options...
revilla Posted March 12, 2019 Share Posted March 12, 2019 Don't see why not? Caterham only one filter for all the K Series variants I think so the fitting must be the same. I've got a spare at home if you want to try it? Link to comment Share on other sites More sharing options...
Wrightpayne Posted March 13, 2019 Share Posted March 13, 2019 Andrew,If you could measure the fixing aperture diameter that would be all I need to check it fits.CheersIan Link to comment Share on other sites More sharing options...
elie boone Posted March 13, 2019 Share Posted March 13, 2019 Link to comment Share on other sites More sharing options...
elie boone Posted March 13, 2019 Share Posted March 13, 2019 RU 1480 fits both plastic and alloy TB, i don't use the foam filters anymore since i had one that was breaking up on the inside. Link to comment Share on other sites More sharing options...
SM25T Posted March 13, 2019 Share Posted March 13, 2019 It's good to be able to wash and re-oil the K&N filter. Link to comment Share on other sites More sharing options...
revilla Posted March 13, 2019 Share Posted March 13, 2019 Ian, I measured it and when I came to post the answer I saw Elie had already posted up the full dimensions. But anyway yes it is 70mm as Elie's diagram shows. Andrew Link to comment Share on other sites More sharing options...
Wrightpayne Posted March 13, 2019 Share Posted March 13, 2019 Thanks all.I’ll replace my 21 YO foam one! I dont fancy testing whether added foam boosts the octane rating!Always had a penchant for K&Ns since building modified mini’s in my youth.Ian Link to comment Share on other sites More sharing options...
SM25T Posted March 13, 2019 Share Posted March 13, 2019 You can buy the K&N cleaner and oil as a kit on line. Link to comment Share on other sites More sharing options...
StevehS3 Posted March 15, 2019 Share Posted March 15, 2019 I’d be interested to know if the non-VVC engines have increased induction noise with the K&N. My standard 1600K has almost zero and it’s something I really miss from my previous 7. Link to comment Share on other sites More sharing options...
Orange Posted March 17, 2019 Author Share Posted March 17, 2019 Been out in it today after fitting the K&N filter and there is definitely more induction noise. Still not loud though. My car is an 1800 non VVC but has the aluminium intake manifold. Link to comment Share on other sites More sharing options...
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