Air filter question
Thread Starter
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Road Warrior
Joined: Feb 2017
Posts: 1,268
Likes: 221
From: farmington michigan
Air filter question
I have a 2010 ultra with the stock air cleaner with a k&n stock size filter. Is there a bigger filter that I can put in there trying to get more air to the motor without changing the stock look I've already opened up the back plate as much as I can
Outstanding HDF Member
Joined: Dec 2008
Posts: 2,007
Likes: 353
From: Ohio
You can buy a number of replacement air cleaners with improved air flow that use the stock cleaner cover. Screamin Eagle makes one they sell and call their Stage 1 Kit. But there several others very similar. Easy to install. Check eBay and classified for used ones. But if you change air flow you will also most likely have to re-calibrate.
Banned
Joined: May 2018
Posts: 4,576
Likes: 978
From: Viet Vet, crossroads
Go ask any dyno operator -not one will ever tell you they had to change out a filter.
Think about it
HD with the help of the EPA is making these things run too lean!
But they have to.
So they don't put on a filter that will choke it.
Think about it
HD with the help of the EPA is making these things run too lean!
But they have to.
So they don't put on a filter that will choke it.
Seasoned HDF Member
Joined: Sep 2008
Posts: 14,146
Likes: 11,220
From: San Diego, CA
Any good quality Stage I air filter (open back plate with good flowing element) will be all that you need. What you have should be just fine. Sounds like you basically turned an OEM filter, into a Stage I style filter. It would take FI, or a very big displacement jump from stock, before you would need more air than a good Stage I air filter upgrade will provide.
Most OEM will (especially the '14+) supply all the air you need. The problem with OEM is it tends to be plugged up for EPA noise limitations, not air flow.... I just don't like all the plastic tub garbage around them and the OEM filters aren't very robust....
I usually go with a Stage I back plate, HD washable Stage I filter, and I use the OEM filter cover over it all...
Most OEM will (especially the '14+) supply all the air you need. The problem with OEM is it tends to be plugged up for EPA noise limitations, not air flow.... I just don't like all the plastic tub garbage around them and the OEM filters aren't very robust....
I usually go with a Stage I back plate, HD washable Stage I filter, and I use the OEM filter cover over it all...
Last edited by hattitude; Aug 8, 2018 at 10:17 AM.
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,543
Likes: 6,418
From: Honah Lee
Take a look at the butterfly opening. That is your necessary restriction opening based on piston diameter and stroke. Unlike exhaust which is pumped out, intake depends on atmospheric pressure to fill cylinder. A stock air filters surface area is more then enough. A big open system will generate more WOT power but it will be a Hoover Vac sound and a terrible low RPM torque loss.
Only true way to keep both is do like Honda and others thay have a gate in the intake that is varable
Only true way to keep both is do like Honda and others thay have a gate in the intake that is varable
Last edited by Jackie Paper; Aug 8, 2018 at 10:26 AM.
I think you have already made your own Stage-I air cleaner, with trimming the
some of the backing plate and adding a K&N air filter. that should flow more air
then your engine will be able to use, if the engine is stock.
John
some of the backing plate and adding a K&N air filter. that should flow more air
then your engine will be able to use, if the engine is stock.
John
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Feeding hot, oily, oxygen depleted air into your intake is counter productive. See REPORT
Without an EBS, the photo below shows what is bypassing your filter and going into your intake-
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Thread Starter
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Road Warrior
Joined: Feb 2017
Posts: 1,268
Likes: 221
From: farmington michigan
Ok fellas here is what I got stock motor was a 96 I put 103 pistons and jugs on it with s&s ez-551 cams opened up the back plate and added a fp3 over two years ago only to find out v&h never added the cams to my map. So now that I can I went in and added the cams and the bike runs terrible way too rich raw fuel coming out of the pipes. I called v&h last night and had to have them put my stock cams back into the map they blamed it on my exhaust stock head pipe no cat double slash mufflers. In my opinion I now looks like a lack of air gonna remove air cleaner tonight and retry a map with the cams in it.