Rubber air filter strip - Contrary Empirical Evidence - Victory Forums - Victory Motorcycle Forum
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post #1 of 23 (permalink) Old 01-04-2018, 12:37 AM Thread Starter
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Default Rubber air filter strip - Contrary Empirical Evidence

Since I had the air fuel ratio digital meter hooked up to the bike I pulled off the air filter rubber strip
everyone talks about. There was no significant change in digital readings without the rubber strip in place. This digital meter is very sensitive and measures in gradients of 10ths. If I were to get more air into the filter at speed or at idle it should change my fuel to air ratio readings, and this simply was not the case. Thus I have to conclude pulling the rubber strip is a placebo effect.
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Last edited by SemperVee; 01-04-2018 at 12:41 AM.
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post #2 of 23 (permalink) Old 01-04-2018, 06:47 AM
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Are your O2 sensors plugged in?

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post #3 of 23 (permalink) Old 01-04-2018, 07:30 AM
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That strip is to keep water/debris out of the air intake area. Years ago my air filter got swamped in a torrential down pour when I was running without the strip. So after that I put it back and even modified the bracket to keep the strip using the Lloydz AF.
I never felt having or not having the strip made any performance difference, but its good to hear a little more more than my seat-of-the-pants evidence.
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post #4 of 23 (permalink) Old 01-04-2018, 09:14 AM
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The dyno, however, tells a very different story. Remove the gasket and get an additional 7-10 hp. Like any intake mod; it has to be matched up with an exhaust mod to allow more air to flow out as well as in. Doing just one won't do much; has to be both.
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post #5 of 23 (permalink) Old 01-04-2018, 11:13 AM Thread Starter
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Quote:
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The dyno, however, tells a very different story. Remove the gasket and get an additional 7-10 hp. Like any intake mod; it has to be matched up with an exhaust mod to allow more air to flow out as well as in. Doing just one won't do much; has to be both.
Read all my upgrades in the signature. I rode bike with and without rubber strip installed on same day. The evidence is in the real time, load based meter reading. End of story.
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Last edited by SemperVee; 01-04-2018 at 11:33 AM.
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post #6 of 23 (permalink) Old 01-04-2018, 11:16 AM Thread Starter
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Quote:
Originally Posted by NOEMTZ View Post
Are your O2 sensors plugged in?
O2 sensors disconnected. AF meter sensor installed in place of OX sensor for readings. Have been disconnected years ago permanently..

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Tri Flo Ovals
Vic K&N knock off Air filter
Lloyds Timing Wheel +2
Relocated Air Shock fill hose
WD SkidPlate reinforced
Hyper running/brake lights
Garmin GPS
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post #7 of 23 (permalink) Old 01-04-2018, 11:43 AM
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Quote:
Originally Posted by SemperVee View Post
Read all my upgrades in the signature. I rode bike with and without rubber strip installed on same day. The evidence is in the meter reading. End of story.
Not the end of anything. One lay person's experience does not close the book on this at all. If anything it barely opens the book for study.

The pros who do the dyno tuning (not going to name names but we all know who they are) say removing that gasket coupled with a freer flowing exhaust definitely adds hp and tq.

You are entitled to your opinions but not your own version of the facts when they clearly say the opposite of what you're saying.

Now if you want to say leaving that gasket in place is best for those who ride in the rain because water can somehow get to the filter without it; I'd be more inclined to agree with you even though I can't see how enough water can get to the filter with a fairing in front of where the water would have to go through. On a XR, yes (with no windshield), but not an XC with a fairing. Having said that; people have their bikes set up differently to control the wind and buffeting. It's possible some peeps have it set up in such a way the rain/air flow could literally be directed to go right to that filter which would be great when it isn't pouring rain but not so great when it is.

I've ridden hundreds of miles in downpours on Harley's with the air filter sticking right out in the open for the water to easily work its way into the intake but miraculously nothing happened. The water vaporized and passed right through the intake, mixed with the gas, and got expelled as vapor along with the regular exhaust gases.

However; those miles were generally on carbed bikes. Not fuel injected. It's highly possible for much less amounts of moisture to affect how a sensitive fuel injected bike like our Vic's might run. I personally have not had that experience and have no reason to doubt the word of those who have with all things being equal.
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post #8 of 23 (permalink) Old 01-04-2018, 11:45 AM
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I wonder if that tank lift from Billet Ace would make a difference.

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post #9 of 23 (permalink) Old 01-04-2018, 12:56 PM
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Quote:
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I wonder if that tank lift from Billet Ace would make a difference.
I have wondered that too. Anyone have some solid proof it does or is just another placebo?

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post #10 of 23 (permalink) Old 01-04-2018, 01:09 PM
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I think the tank lift for the X-bikes is more for looks than anything else. I believe KevinX was going to do a before and after dyno test to really find out but don't know if he ever got around to it. I know he was sent the two lift adapters. Mine are still sitting on my work bench for the next time I have my tank off.
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