Underside aerodynamics - rear diffuser

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Underside aerodynamics - rear diffuser

By teal_dx
- Mon Nov 12, 2007 4:38 pm #29544 Has anyone ever experimented with aerodynamics on the underside of their civic?

What got me thinking is the VX rear diffuser:
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And then I've seen aftermarket "race" versions:
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Varis Rear diffuser

Here's something not so extreme as the ones above, on an STi:
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I'd love to find something like this one, reasonably priced, for my EG. I don't need CF, aluminum or fiberglass will do for me.

These are all alternatives for drilling the big holes in the rear bumper. The rear bumper acts as a parachute and catches are, creating drag.
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By Gorveatt
- Mon Nov 12, 2007 4:40 pm #29545 I'd just go to the dealership and see if they can get the VX ones, i'm actually thinking on that now :lol:
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By teal_dx
- Mon Nov 12, 2007 4:45 pm #29546 They are cheap, like $35 cost if you know someone that works at a dealership, plus a few $ for mounting parts. But they only cover the driver side, the muffler side is still wide open. The OEM mufflers are big barrels, but most of us have smaller aftermarket mufflers. So I think that a full one going all the way accross would be good.

Maybe I'll just stick with the OEM one and then try fabbing something for the rest
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By Gorveatt
- Mon Nov 12, 2007 4:54 pm #29548
teal_dx wrote:They are cheap, like $35 cost if you know someone that works at a dealership, plus a few $ for mounting parts. But they only cover the driver side, the muffler side is still wide open. The OEM mufflers are big barrels, but most of us have smaller aftermarket mufflers. So I think that a full one going all the way accross would be good.

Maybe I'll just stick with the OEM one and then try fabbing something for the rest


Yeah i get stuff at employee discount, cause my dad works at our dealership and they put it in his name, and mounting stuff if free for me cause i go to my stepfathers shop, God i love connections :lol:

I wonder if there is a RHD one for EG's... wait never mind it still has the same exhaust routing lol
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By vtec_gloucester
- Mon Nov 12, 2007 5:13 pm #29552 the one on the STi looks really nice, id have something like that not only to help with the aero but for looks too!
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By Bouli
- Mon Nov 12, 2007 5:18 pm #29555 OMFG

i want to have one of those :shock: :shock: :shock: :shock:


The one on the DC2 is actually a spoon s2k diffuser !
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By hondajunkee
- Mon Nov 12, 2007 5:22 pm #29557 hey teal search the columbus craigslist or maybe cleveland, but theres a guy around here that makes them and he can make them out of either carbon fiber or fiberglass which ever you want
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By asianrob
- Mon Nov 12, 2007 10:16 pm #29600 heres one for the front

after market for front
http://cgi.ebay.com/BEATRUSH-UNDER-PANE ... dZViewItem

i always thought the rear one looked different ??? like a panel that covered the rear part but had like a hole for the tow hook??
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By teal_dx
- Mon Nov 12, 2007 11:04 pm #29607
DC4rob wrote:heres one for the front

after market for front
http://cgi.ebay.com/BEATRUSH-UNDER-PANE ... dZViewItem

i always thought the rear one looked different ??? like a panel that covered the rear part but had like a hole for the tow hook??


That is a nice piece!
See I don't know why I couldn't make something like that 8)
I would like to have something like that up front and something similar on the rear, and see what a difference it makes.

I may add this to my list of winter projects!
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By ohDirka
- Mon Nov 12, 2007 11:31 pm #29611 the one dc4rob posted reminds me of a rally car skid plate
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By LowTEC-Derbo
- Mon Nov 12, 2007 11:51 pm #29615 that front one looks like it might not fit cars with bigger piping though

I would love to have one for the rear. I wonder if something can be made.
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By teal_dx
- Mon Nov 12, 2007 11:54 pm #29616 I think it would be as easy as creating a cardboard template and then tracing it onto a piece of thin stainless. Then attaching it with a few bucks worth of hardware from home depot.
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Re: Underside aerodynamics - rear diffuser

By Greasedmonkey
- Tue Nov 13, 2007 4:02 am #29668
teal_dx wrote:Has anyone ever experimented with aerodynamics on the underside of their civic?

What got me thinking is the VX rear diffuser:
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Honda sales this, and I think I found in the in the catalog. ILl check into it more and let you know. I think Imma order it. Its cheaper from honda too from the looks of it. If its the right part.
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By BAXTER_EJ1
- Tue Nov 13, 2007 4:16 am #29671 Dude you are lucky to work for Honda :hehe: lol

That def. looks like it though.
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