Featured DIY rear bumper fake vent conversion

Discussion in 'Civic Si Forum (10th Gen)' started by Brian17Si, Aug 12, 2017.




  1. Brian17Si

    Brian17Si Senior Member

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    :wave:Check below for final pics...

    9B0DA644-691C-4DE1-8498-ECE24EECD921-7095-00000548D67617D8.jpeg


    DIY Rear Vent Conversion

    This was midway point
    I'm in the process of converting the rear vents to active vents. These are the original vent garnishes and conversion is custom done by me. Next is to hand off to body shop to remove bumper, cut holes and respray. This part could also be done by me.

    To cut or not to cut?
    I'm going to cut entire vent area or just thinner vertical slanted area (see in picture below)

    (UPDATED) Final finished pics:

    pic1-jpg.jpg

    pic2-jpg.jpg

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    Look close you can see vents in car’s shadow.
    pic4-jpg.jpg

    pic5-jpg.jpg

    The true test (winter weather) :thumbsup:

    ADBDDC9D-B754-4D3B-B3E6-7A163267288D.jpeg

    47A6D35E-15D2-43A1-86B3-D9DA6CA867B3.jpeg
     
    Last edited: Feb 7, 2018
  2. zroger73

    zroger73 Senior Member

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    What are you attempting to gain by doing this modification?
     
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  3. coopermidnight

    coopermidnight Senior Member

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    I'd prefer a bumper swap with the regular sedan, but I'm interested to see how this turns out!
     
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  4. T_A_H

    T_A_H Senior Member

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    This.

    Every time I see a regular Civic LX I wish they just left the Si body style alone and just added a side skirt and spoiler
     
  5. DoodleDave Senior Member

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    I really want to swap with a normal Civic. I have already asked in my regional area forum. I really thought someone with a basic Civic would like a sportier looking front bumper but I guess not. I think I will hold out until Mugen makes parts for the car. If they have a body kit with a more appealing front bumper than I will do that. If not I will buy a new bumper.
     
  6. invader

    invader Senior Member

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    That looks better already. :thumbsup: Opening up such huge rear bumper vents should yield a good improvement in highway fuel efficiency, as well as quicker 1/4 mile time and trap speed.
     
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  7. zroger73

    zroger73 Senior Member

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    Do you have actual test data to support that? Opening up those spaces would save weight and material. If it would improve fuel efficiency or performance even by the tiniest imaginable amount, don't you think Honda would have done that from the factory? I can't think of anything better for a manufacturer than saving weight, material, and money while gaining performance and fuel efficiency at the same time!

    In a worst-case scenario, allowing air to flow through areas not intended could actually create additional drag and decrease efficiency and performance. It may also alter the airflow characteristics in such a way that causes exhaust fumes to be drawn into the vehicle. We'd need a wind tunnel and several hundred thousand dollars worth of test equipment and fluid modeling software to validate these wild guesses.
     
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  8. 360glitch

    360glitch Moderator Moderator

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    I too expect this may be the case.
     
  9. HayaiKuruma

    HayaiKuruma Senior Member

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    Its Monday, so I'm a little slow. But are the pics above of the actual conversion or are they just photoshoped images?

    PS, I think it looks good. Might have to do some black paint mitigation behind the vents but thats no big deal.
     
    Last edited: Aug 14, 2017
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  10. Boomba Racing

    Boomba Racing Civic X Vendor Elite Sponsor

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    Props to you for being the first one on trying to tackle this task!
     
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  11. Design Senior Member

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    Well played, sir. :popcorn:
     
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  12. kritz

    kritz Senior Member

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    Looks a lot better IMO!
     
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  13. Shankmeyster

    Shankmeyster Senior Member

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    The funny thing is you are the first one to realize that was a troll attempt. Anyway, I would rather just have a vent delete rear bumper option. Front ones are fine but the rears are kind of pointless.
     
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  14. jakabony

    jakabony Senior Member

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    You would prob gain more functionality by opening up the front "vents", instead of the rear ones.
     
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  15. invader

    invader Senior Member

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    No. Front vents are better left shut for reduced drag. That's why we see active front shutters on some models which close at higher speeds to improve fuel efficiency.

    Venting out the rear bumper cover helps by reducing drag, which is why it's of common practice in drag racing... Weight savings are of course negligible.

    It already looks better because the rear vents are no longer fake. It does also look lighter. It will look great once it's finished and opened up behind.
     
    Last edited: Aug 14, 2017
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