<VV> Re: <VV>K&N air filters + installation warning!

[Sethracer@aol.com]

In a message dated 3/16/2004 11:28:32 PM Pacific Standard Time, 
corvair_1965@lycos.com writes:
is there a k&n filter that can fit driectly over my carbs.. on a 65 110.. or 
is there a way i can get one on it?

Sure - The 2003 K&N Catalog lists a buch of filters with the 2.25" inside 
diameter needed to fit over the Corvair Rochester H-series carb top. You have to 
make a decision, though. The top of the Corvair carb has two areas that jut 
out about 3/16" from the 2.25" diameter. You can trim those off with a hacksaw 
and a file, thus making the top of the carb really round, or you can trim the 
flange on the K&N filter in two spots, slicing off enough rubber to let the 
filter drop down over the carb top. I would suggest removing the carbs and 
trimming the top covers. It doesn't affect the original air cleaner mounting, so you 
can always go back to stock. It also provides a better seal for keeping the 
crud out. 
You will have to choose the outside diameter of the filter element. K&N gives 
you a choice of 3.5" , 4.5" or 5.5" then the overall height 2" to 6" in most 
diameters. You can also choose the flange length, most are either 5/8" or One 
inch. There are also angled flanges which could tip the filter away from other 
stuff, if you so desire. Example - A 5" tall, 3.5" diameter, straight 5/8" 
flange filter is P/N RU-0610 - with a 6" height, the P/N is RU-0620. A 4.5" 
diameter, 5" tall, 5/8" flange unit is P/N RU-0640. You might be able to find more 
info at www.knfilters.com - Seth Emerson (too many catalogs in a row!)

One other note, This weekend I saw a pair of really nice Corvairs at the 
Lompoc Show that had individual air filters installed. Both owners had installed a 
small K&N filter on the PCV pipe that would have originally stuck up into the 
inside of the stock air filter element. I strongly suggest that this NOT be 
done. Feed the outlet of this tube to one filter or the other, but don't let it 
exhaust into the engine compartment. The design of the PCV system will, at 
times, pull air from the inside of the air filter element into the base of the 
carbs via the small orifice in the tube. This sytem is okay for that, the 
little filter will let only clean air go in. The problem is that in some modes, 
(When the amunt of fumes overloads the little orifice) the PCV system sends 
engine fumes out of that tube, where, originally, they would be sucked back into 
the carbs via the stock air filter housing, and into the motor. With the little 
filter installed instead, the fumes will exit into the engine compartment - 
directly over the cooling fan inlet! NOT a good thing! Because the fumes are 
then blown into the car as part of the "Fresh Air" heater/defroster design. One 
of the two cars had a bit of oil all around the little filter's lower cap, a 
sure sign of fumes escaping. You don't want to smell oil or breathe engine 
blowby. Do something else with the breather. - Seth