DIY rear bumper fake vent conversion

Brian17Si

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:wave:Check below for final pics...

FAKE
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REAL


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OK, members are now doing vent conversions in many different ways. Now, I believe the 2020 OEM rear bumpers come precut with openings, and companies are creating fabricated trims to replace OEM fake vents. I'll continue to update this post and add member names to images and additional images.



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T_A_H

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

DoodleDave

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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.
 

zroger73

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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.
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.
 

360glitch

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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.
I too expect this may be the case.
 

HayaiKuruma

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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.
 
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Shankmeyster

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Well played, sir. :popcorn:
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.
 

jakabony

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

invader

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