jmead Posted June 1, 2003 Share Posted June 1, 2003 I've got a MSA-style cold air intake tube coming from eBay minus a filter. I decided I'd rather have a true K&N rather than the "K&N-style" filter it was listed with. I was wondering what size/shape k&n filter I should get in order to maximize filter size yet minimize the chance of it rubbing on the body or just not fitting entirely. I will probably order this from summit, but if anyone else has any recommendations on a better place to buy K&N filters that would be great too. Quote Link to comment Share on other sites More sharing options...
fl327 Posted June 1, 2003 Share Posted June 1, 2003 how does it come out into the front of the car, does it make a 90 degree bend and point towards the passenger side of the car, if so, you can run any air filter, i assume its a 3" inlet right? i would use one for a mustang 5.0 , they are HUGE. i saw a zx with one once that was like a foot and a half long!!!! i would like to run one like this someday, but they are dang expensive, like 150 or something like that. summit is probably your best bet for it. Quote Link to comment Share on other sites More sharing options...
Mike C Posted June 1, 2003 Share Posted June 1, 2003 I bought a round cylinder K&N for my homemade cold air intake with 3" inlet. It is 4" by 9" and from Summit racing was $35. It has a galvanized end cap with a stud for a mounting bracket or strap. The tapered ones are more expensive, so seemed a no-brainer. Quote Link to comment Share on other sites More sharing options...
WHP Posted June 2, 2003 Share Posted June 2, 2003 Per K&N the formula for air filter size is: A=CIDxRPM/25,500 A= air filter area CID= cubic inch displacement RPM=max engine revolutions per minute I never knew, but ASSumed the area is the general outside deminsions, not the surface area of all the pleats. Will Piatt Quote Link to comment Share on other sites More sharing options...
yo2001 Posted June 2, 2003 Share Posted June 2, 2003 what do you do if you are forced inducted? I'm goingto go get me a 12 inch one. Quote Link to comment Share on other sites More sharing options...
Mike C Posted June 2, 2003 Share Posted June 2, 2003 I found the big 12 inch wouldn't fit everywhere you wanted to put it...and just generally had more approval for my 9 incher. Quote Link to comment Share on other sites More sharing options...
yo2001 Posted June 2, 2003 Share Posted June 2, 2003 If there is a will, there is a way Quote Link to comment Share on other sites More sharing options...
jgkurz Posted June 2, 2003 Share Posted June 2, 2003 Per K&N the formula for air filter size is: A=CIDxRPM/25' date='500 A= air filter area CID= cubic inch displacement RPM=max engine revolutions per minute [/quote'] Let's plug some real numbers into the formula. Let me apologize in advance for not remembering my math skills. I'm sure this answer will be obvious to some of you on this forum. CID = 183 Max RPM = 7000 50.24=183x7000/25,500 I have a K&N part# RF-1039 which has a 6" long round tapered element. How do I compare the 50.24 to this element? Quote Link to comment Share on other sites More sharing options...
Mike C Posted June 2, 2003 Share Posted June 2, 2003 Just assume that your element is round and not tapered, use the smaller diameter, let's say 3"? and you can do 2*Pi*1.5*6=56.62. You actually have a little more than that because of the taper, but me old brain doesn't recall the formula for surface area of a cone. The round one I have, 4*3.14*9=113.04 in^2 Quote Link to comment Share on other sites More sharing options...
proxlamus© Posted June 7, 2003 Share Posted June 7, 2003 I found some of these pics on Zcar.com Quote Link to comment Share on other sites More sharing options...
TomoHawk Posted September 2, 2003 Share Posted September 2, 2003 That looks kinda cool, but do you really expect it to work? what kind of improvement are you expecting? I saw one of these things on Ebay for $60 (includes filter and maybe rubber coupler) and the guy claims an 8-10 hp increase: http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?iewItem&item=2428703316 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.