Choosing an air filter for a tight spot
#1
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Choosing an air filter for a tight spot
I'm looking at ordering an air filter for a tight spot, and it looks like the safest bet to fit is a K&N, 3.5" wide, 4" long. Anybody think I'm going to be missing out with that small of a size and should try to squeeze the 5" long one in there? I'm looking at 2.5" ID, as I have piping in that size I can make work.
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According to the K&N website, a 1600 cc engine at 7000 rpm needs ~33 in^2 of effective filter area. Taking into account the seals at both ends, the 4" filter will provide ~35 in^2 of filter area, so it's just big enough. But I'm not sure that having a turbo won't increase the required surface area. Maybe I'll try the 5" and jam it in there.
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Yeah, I went back and did some more quick calcs, and it looks like the 6" would get me to 11 psi, 5" to 6 psi, and the 4", well, maybe 1psi. So it looks like I'm going to have to cram a 6" in there.
#6
dude it was a real tough fit for me i ended up cutting the flanges back on my 90 and my filter and still had to cut the hood, and use ductape as my 2 1/2 inch pipe had to be modded so it wasn't to long for me. If this doesn't work i am going to put a peice of pipe about as long as the afm in there and use the location i used with the afm alot more room there. GL man lemme know if you figure it out, it might help me as well.
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