Author Daylight running lights - do they restrict air flow  (Read 1370 times)

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  • Offline AdzventureXR   kr

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    Daylight running lights - do they restrict air flow
    on: November 15, 2021, 04:48:38 am
    November 15, 2021, 04:48:38 am
    I was looking at front intake and found that with centre daylight module it covers alot of the intake area. Has anyone tried removing to see if there is a difference?

    I would think removing it would kick a fault. Will have to try

    With all the worries of air filters and ecu tuning, this seems to be a restriction.

    Any thoughts? New gen 2 has a nice intake area.
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  • Offline smithy   au

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    Re: Daylight running lights - do they restrict air flow
    Reply #1 on: November 15, 2021, 05:50:03 am
    November 15, 2021, 05:50:03 am
    *Originally Posted by AdzventureXR [+]
    I was looking at front intake and found that with centre daylight module it covers alot of the intake area. Has anyone tried removing to see if there is a difference?

    I would think removing it would kick a fault. Will have to try

    With all the worries of air filters and ecu tuning, this seems to be a restriction.

    Any thoughts? New gen 2 has a nice intake area.

    Negligible. The area of the air intake with or without the DRL is greater than the combined area of the 4 accoustic inserts and pretty much the same without the inserts fitted. Unless you're doing in excess of 300kmh, (which the bike isn't even capable of), the ram air effect is a non-event.

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  • Offline Antares   gb

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    Re: Daylight running lights - do they restrict air flow
    Reply #2 on: November 15, 2021, 07:06:25 am
    November 15, 2021, 07:06:25 am
    I was actually thinking of removing it anyway just to replace it with a 3D printed grille with a more unique pattern that looks better, and maybe provides better airflow. Then again I don't have the DRL to care about.

  • Offline AdzventureXR   kr

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    Re: Daylight running lights - do they restrict air flow
    Reply #3 on: November 15, 2021, 08:11:55 am
    November 15, 2021, 08:11:55 am
    *Originally Posted by Antares [+]
    I was actually thinking of removing it anyway just to replace it with a 3D printed grille with a more unique pattern that looks better, and maybe provides better airflow. Then again I don't have the DRL to care about.

    Another reason to get a 3d printer. Winter projects. Or just strip it down and go naked.
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  • Offline AdzventureXR   kr

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    Re: Daylight running lights - do they restrict air flow
    Reply #4 on: November 15, 2021, 08:14:24 am
    November 15, 2021, 08:14:24 am
    *Originally Posted by smithy [+]
    Negligible. The area of the air intake with or without the DRL is greater than the combined area of the 4 accoustic inserts and pretty much the same without the inserts fitted. Unless you're doing in excess of 300kmh, (which the bike isn't even capable of), the ram air effect is a non-event.

    Possibly the overall area is similar, but the direct shot at the frame opening is blocked.

    I have yet to remove acoustics, that would probably be an additional option.

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  • Offline Antares   gb

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    Re: Daylight running lights - do they restrict air flow
    Reply #5 on: November 15, 2021, 08:27:56 am
    November 15, 2021, 08:27:56 am
    *Originally Posted by AdzventureXR [+]
    Another reason to get a 3d printer. Winter projects. Or just strip it down and go naked.

    Really not sure if it's an issue to just remove it, I think it'd look cool. It doesn't offer much in the way of protection/filtering anyway. Depends on whether there'll be tabs leftover that are visible without it in place ruining the looks, I can't recall exactly where those are.

  • Offline lospsi   gr

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    Re: Daylight running lights - do they restrict air flow
    Reply #6 on: November 15, 2021, 09:25:31 am
    November 15, 2021, 09:25:31 am
    I've been running it for a while without the front grille (I don't have the DRL option) and I didn't noticed any differences but I haven't ripped it. I have left the acoustic inserts in place though.

  • Offline Antares   gb

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    Re: Daylight running lights - do they restrict air flow
    Reply #7 on: November 15, 2021, 09:53:24 am
    November 15, 2021, 09:53:24 am
    Hmm, doesn't look bad but you have the carbon to show off. I think with a pair of the matt gecko LEDs it'd look sick but with no carbon and stock lights I'm tempted to make a hexagonal grille for it, there is a nice area for the grille to rest on to take some strain off the clips and make it flush on the front. I might experiment with it a little just out of curiosity, I'm afraid it'll be a pain in the ass tho just cos taking that fairing off is not exactly quick...

  • Offline Salem   nl

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    Re: Daylight running lights - do they restrict air flow
    Reply #8 on: November 15, 2021, 03:00:34 pm
    November 15, 2021, 03:00:34 pm
    I don't think it makes any difference. Take a flashlight, the actual bottleneck is where the air goes around the steering stem into the airfilter.. But you can roughly calculate it too, 6000rpm 1st gear, 60kph as example:

    At 60kph in 1st, 6000rpm the engine needs around 50 liters of air per minute with throttle wide open

    At 60kph a 100 cm2 frontal intake theoretically flows already 166 liters of air (I"m fairly sure the bottleneck is quite a bit smaller)

    Theoretically that means a bit of boost, but the assy before the air filter is not airtight, 

  • Offline Antares   gb

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    Re: Daylight running lights - do they restrict air flow
    Reply #9 on: November 15, 2021, 03:18:09 pm
    November 15, 2021, 03:18:09 pm
    *Originally Posted by Salem [+]
    I don't think it makes any difference. Take a flashlight, the actual bottleneck is where the air goes around the steering stem into the airfilter.. But you can roughly calculate it too, 6000rpm 1st gear, 60kph as example:

    At 60kph in 1st, 6000rpm the engine needs around 50 liters of air per minute with throttle wide open

    At 60kph a 100 cm2 frontal intake theoretically flows already 166 liters of air (I"m fairly sure the bottleneck is quite a bit smaller)

    Theoretically that means a bit of boost, but the assy before the air filter is not airtight,


    It is grasping at straws looking for performance here. The acoustic insert is way more of a restriction and that with a specific tune still only gains 1-2 bhp at peak rpm.

    Last Edit: November 15, 2021, 03:18:51 pm by Antares