Just measured the stock filter:Inside dia:3" Outside dia: 4 5/8" Height: 3"Then I checked their site. There are two filters that might fit: AL-6502 & BM 1298.They're both about 3 1/8" high with a 3" inner diameter. Maybe one of these would fit better.Scott
New RE comes with enclosed air filter :
I did a little check on my mpg with the last tank of gas. With the stock air cleaner I was usually getting about 55mpg, with the S&B cone I got about 45mpg. That seems a little drastic, in the 10% range. It has been colder so the bike it probably running richer, I've been using the freeway more, and one tank is a short measurement. I'll keep tabs on it and also check the plug to see if it looks like I'm running rich or lean.Scott
a honecomb to straighten the flow or a plenum to give it some intake length to straighten the flow should make it better.
I've got the stock exhaust with cat intact. The exhaust note seems to come up with just the cone filter. Past half throttle you get a nice honk/growl out of the engine. Below that it's still pretty tame.
Prof Stack,I think you're right, should be fine with your filter setup. Were you tracking mpg befoe you installed it? Just wondering if you can do a comparison.Scott
Have you checked since installing the new filter? Any diff?I would attribute my drop to 'spirited' takeoffs since the install but I think 10% is too much to be accounted for from just that.Scott
This C5 is getting really smooth. At 55mph the motor feels like it is barely working. Nice.
I picked up the WIX air filter yesterday.ID 3 7/8"OD 5 1/2"HT 3 1/8"I did a quick check and it looks like it will just fit if I flip the lower mouning bolt and point the threads out. It doesn't cover the crankcase vent and I think it will just clear the snorkel mounting bolts. I think it will seal with the existing lid even though it doesn't cover the entire edge of the filter. While looking online I noticed NAPA advertised their version will flow 75CFM for whatever that is worth. More to come...Scott
Hey, Norm. I thought your first tank was 81mpg. I've found the mileage plummets with not a whole lot of wrist and speed.
Anyway, the C5 ran great and the MPG came in at 67.0 which is just fine with me. I think I'll try the OEM filter again and see how it differs .
Why not take those dampeners off the fins. They don't do much, look like crap, and restrict airflow. There's plenty of fin support already!!
I flipped the bottom mounting bolt and the Corvair air filter dropped right in. centered and the lid closes without a problem. It obscures about half of the crankcase vent line but I'm sure that's not a problem, still plenty of room to vent gases. I guess it's a smidge taller than the stock filter because the standard top plate clamped down nice and tight. I'm sure it's well sealed. I'm guessing this means you could order the K&N equivlaent and it would also fit. Tomorrow I hope to take it for a spin.Scott
Nigel, unlike most vehicles, the RE pulls air from the inside to the outside of the filter. The hinge is on the clean side of the air stream. As such, anything that gets sucked through goes right to the throttle body.
Scot Thanks for your reply I got away from this thread for a few weeks and didn't get back to it until today. Some life happened in between I guess. Just a thought about the plastic air box sealing upgrades. It seems to me that someone earlier suggested this might fix the poor sealing of the air filter endplates itsetlf: I don't think this would be the case. It would only stop outside air from getting sucked direct from the higes to the intake manifold. Air slipping though under the rubber seals on the air filter unit would still happen if the sscrew down didn't tighten and seal. Regarding the larger diameter (3 1/2 or 3 5/8) fillters , would another metal plate under the stock plate on the same mounting screw 9which might have to be longer ) fit and work? . Or what about getting the "lid" meant for the larger filter unit (whatever machine it was meant for) So long as the centre hole is the same size, a larger diameter lid to seal to the free end of the filter should work perfectly and if they make the filter that size, someone must be making the lid. Is there a rubber washer sealing the centre screw that holds the filter lid in place? Nigel
If enough of us e-mail K&N asking for a proper size filter, they just might start producing one, I did my part. firstname.lastname@example.org
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