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General Category >> Rubber Side Down! >> Modifying the POD filter
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Message started by Dave on 11/17/17 at 02:39:21

Title: Modifying the POD filter
Post by Dave on 11/17/17 at 02:39:21

This fellow likes to post humorous videos....and his tool selection is intentionally crappy - but the first part shows why POD filters can be a real problem on the CV carb.

The shoulder of the rubber boot can block the vent for the vacuum slide and make the carb impossible to tune.

Ignore his comments on the Lollipop and the washer comments...that is just humor. But the first part about marking and cutting the boot may be good advice - and if the boot unscrews like the one he uses and your carb is not on the bike.....it looks like is is easy to do. However - a lot of the pods have the filter and rubber boot molded together and you will not be able to see down the end to the carb - but you may still need to trim the rubber if it blocks the vent(s).

https://www.youtube.com/watch?v=Na6dbH9Mprc
[media]http://www.youtube.com/watch?v=Na6dbH9Mprc[/media]

Title: Re: Modifying the POD filter
Post by antmanbee on 11/17/17 at 03:54:53

Why not leave the original boot intact?

Title: Re: Modifying the POD filter
Post by Dave on 11/17/17 at 04:13:12

606F756C606F636464010 wrote:

Why not leave the original boot intact?

That is what I did - but a lot of folks move the battery box and place a POD filter directly on the carb inlet. I believe they do this more as a "fashion statement", as they have seen other folks doing this on the custom bikes. The Rat and Bobber look tries to get the bike as light and simple as possible, and the battery is moved to open up the area behind the carb and provide a simpler/lighter look. I believe the stock air box and filter does a good job on our 30HP engine....and there isn't likely any noticeable increase in HP by adding a POD filter.

I thought this video clearly showed one of the problems that occurs when you use a POD filter on the stock carb, and the video showed how the boot needs to be trimmed to allow air to get to the vents.

I used a large foam filter, and a short section of the original air boot on my Mikuni round slide carb.
http://i50.tinypic.com/fxw3up.jpg

Title: Re: Modifying the POD filter
Post by antmanbee on 11/17/17 at 09:30:40

I removed the airbox for several reasons.
I like the sound of the intake roar.
I wanted to not have sidecovers.

I am sure the stock filter breathes just fine and the length and flow characteristics of the rubber intake are usually optimized by the manufacturer. That is why I almost always try to keep it intact when using a pod like I did in the picture.