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  1. #1
    Very Active Member Haze's Avatar
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    Smile Help Needed - F3 Air Intake Modification

    2016 F3T. It has a Cat Delete and K&N air filter. It has a burble when closing the throttle on deceleration.

    Has anyone modified the intake system to get more cold air into the system?

    What did you do??? Pictures???
    David C
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  2. #2
    Very Active Member troop's Avatar
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    The only mod I know of is drilling (2) 1” holes on the air filter cover, like what Monster does with their stage 2 flash. This was on my past F3S with PV3 custom tune. 1" plastic hole plugs pop right in. However, the Spyder will pop like crazy on decel with stock ecu tune.
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    Last edited by troop; 11-24-2024 at 09:23 AM.


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  3. #3
    Very Active Member Snowbelt Spyder's Avatar
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    Quote Originally Posted by Haze View Post
    2016 F3T. It has a Cat Delete and K&N air filter. It has a burble when closing the throttle on deceleration.

    Has anyone modified the intake system to get more cold air into the system?

    What did you do??? Pictures???
    A burble. So what? And please don’t say that this means it’s running lean. It’s not. If it was, you’d get the code. There’s no carburetors anymore. That’s in the past. The ECM automatically controls the AFR. Train yourselves up on Closed Loop and Open Loop operation. You're in Closed Loop at this point. Here, courtesy of AI:

    Here's how closed-loop fuel injection works:

    Fuel calculation

    The Electronic Control Unit (ECU) calculates how much fuel the engine needs based on programmed fuel tables and sensor input.

    Air/fuel ratio comparison

    The ECU compares the target air/fuel ratio to the actual ratio measured by the O2 sensor.

    Fuel adjustment

    If the ratios don't match, the ECU adds or subtracts fuel to equalize them.


    It’s all automatic. The ECM will correct before you can blink twice. If there was a problem, you’d get the code. I bet that you can simply hear the sound better because of the cat delete. But, if you REALLY want to drill holes in your intake plenum, it’s your machine.
    Last edited by Snowbelt Spyder; 11-23-2024 at 05:47 PM.


    Doug

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  4. #4
    Very Active Member Haze's Avatar
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    Thank You to the respondents.
    I was worried about running lean.
    I now understand the action of the ECU and feel relaxed with the burble...
    No codes and no worries.

    Cheers David C.
    Last edited by Haze; 11-23-2024 at 11:10 PM. Reason: spelling
    David C
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  5. #5
    Very Active Member Lew L's Avatar
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    .

    Hi Dave,
    Did you get the answer you needed? My solution probably won't work for you as the intake tube is different on the RT. I'm going to look on a parts page to see what the intake snorkel looks like on your ryde.

    I looked on the parts diagram, found your intake, and it looks like the end that doesn't attach to the air box attaches to " something". IDK what, but it might be baffled somehow. I removed the baffle and opened the intake on mine, but IDK how yours is configured. I'd try to find where the air comes into the system (hopefully from the front of your F3T).

    Lew L
    Last edited by Peter Aawen; 11-29-2024 at 05:55 PM.
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  6. #6
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    Quote Originally Posted by troop View Post
    The only mod I know of is drilling (2) 1” holes on the air filter cover, like what Monster does with their stage 2 flash. This was on my past F3S with PV3 custom tune. 1" plastic hole plugs pop right in. However, the Spyder will pop like crazy on decel with stock ecu tune.
    Wouldn't drilling holes there let more hot air into the airbox?
    And most filters flow from the outside in, so that would let unfiltered air bypass the filter.
    Last edited by Peter Aawen; 12-02-2024 at 03:29 AM. Reason: Please only use the forum supplied emojis. ;)
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  7. #7
    Very Active Member troop's Avatar
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    Quote Originally Posted by Cobranut View Post
    Wouldn't drilling holes there let more hot air into the airbox?
    And most filters flow from the outside in, so that would let unfiltered air bypass the filter.
    1.) That has been debated in the past.
    2.) No. The bottom of the air filter is seated into the chamber.


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  8. #8
    Very Active Member ulflyer's Avatar
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    My 16 F3 was totally standard and it had the "burble" as well. I recall others saying the same. Personally I liked the sound of it.
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