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rear bumper diffusers (do they work)

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Old Apr 17, 2007 | 08:41 AM
  #26  
Mista Bone's Avatar
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Default Re: (H-T guy)

VX diffuser, I believe Katman took the pic years ago.



On my "slow" NA SOHC I dropped .2 seconds just by removing the rear bumper COVER, I left the steel bar there.

Current design....it was a junk cover......



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Old Apr 17, 2007 | 09:36 AM
  #27  
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^^ i did just what you did Bone, but i went all the way across with it. i did notice it on the highway too...car seemed to "roll" easier..hard to explain but i deff. noticed less drag on the car...mine had a rear lip also so it may have been affected more..
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Old Apr 17, 2007 | 11:19 AM
  #28  
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Default Re: rear bumber diffusers (H-T guy)

In theory it helps. Wether we go fast enough for it is the question.

I did my rear bumper....


Any trapped air is going to cause drag.
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Old Apr 17, 2007 | 11:28 AM
  #29  
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^^ i want to do that exact same thing on my teg...do you have a full bumper shot? curious how the overall look is..
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Old Apr 17, 2007 | 12:35 PM
  #30  
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The easiest way to test to the old "coast down" test.
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Old Apr 17, 2007 | 01:53 PM
  #31  
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Default Re: (Mista Bone)



My rear bumper diffuser.. Like to keep it as stock as i can with have the benifit of not loosing my bumper down the track
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Old Apr 17, 2007 | 02:18 PM
  #32  
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Default Re: (bamboosted)

would it look stupid if i did 2 rows of 1 1/2" holes. 20 holes total?
Im thinking about being creative with my holes.


Modified by H-T guy at 8:17 PM 4/17/2007
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Old Apr 17, 2007 | 02:36 PM
  #33  
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Default Re: (bamboosted)

I did the same thing to my Integra bumper as bamboosted did. I never did any back to back test runs tho. Very simple to do on a 98+ Integra rear bumper.
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Old Apr 17, 2007 | 03:16 PM
  #34  
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actualy if you watch nhra funny cars, there tail lights are on hinges to allow air to escape...
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Old Apr 17, 2007 | 03:37 PM
  #35  
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<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by H-T guy &raquo;</TD></TR><TR><TD CLASS="quote">Im thinking about being creative with my holes.</TD></TR></TABLE>

There are a lot of **** stars out there who thought the same way
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Old Apr 17, 2007 | 03:41 PM
  #36  
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Default Re: (Hardt)

i know first hand, we see them everyday
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Old Apr 17, 2007 | 03:41 PM
  #37  
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Default Re: (MrParks)

haha
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Old Apr 17, 2007 | 04:27 PM
  #38  
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Default Re: (fast2camciv)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fast2camciv &raquo;</TD></TR><TR><TD CLASS="quote">^^ i want to do that exact same thing on my teg...do you have a full bumper shot? curious how the overall look is..</TD></TR></TABLE>

No full shot sorry....

Will this do?

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Old Apr 17, 2007 | 06:59 PM
  #39  
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Default Re: (tepid1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tepid1 &raquo;</TD></TR><TR><TD CLASS="quote">

No full shot sorry....

Will this do?

</TD></TR></TABLE>

where did you get the kevlar covers?
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Old Apr 18, 2007 | 12:17 AM
  #40  
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Default Re: (mike93eh2)

X2 that looks sweet
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Old Apr 18, 2007 | 02:33 AM
  #41  
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Default Re: (mike93eh2)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike93eh2 &raquo;</TD></TR><TR><TD CLASS="quote">

where did you get the kevlar covers?</TD></TR></TABLE>

I had them custom made. Same material my hood, ECU mounting plate and sunroof plug is made from. Carbon/Kevlar....

Hit up Adam (crx12 here on H-T) from lighter-faster.com for the diffusers. Tell him that I sent you and he will take care of you.
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Old Apr 18, 2007 | 04:40 AM
  #42  
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Default Re: (tepid1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tepid1 &raquo;</TD></TR><TR><TD CLASS="quote">

No full shot sorry....

Will this do?

</TD></TR></TABLE>
yea its cool, i just wanted to get a feel for the over all look of it, i want to keep a clean look and still be functional. yours looks very nice! i think im going to make some from alum. though, since i work at a sheet metal shop it makes it easy lol
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Old Apr 18, 2007 | 05:49 AM
  #43  
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Default Re: (fast2camciv)

If you have access to a water jet that would work best.
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Old Apr 18, 2007 | 08:59 AM
  #44  
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Default Re: (rota92)

i hole sawed the rear bumper of one of my old daily civic and noticed a difference driving on the freeway. the car felt less restricted (less laggy) than with the stock bumper uncut. i never tracked the car with the stock bumper and with that bumper so can't tell u the 1/4 differences like the other guy on here. but there was definitely a difference.
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Old Apr 18, 2007 | 09:59 AM
  #45  
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Default Re: (MrParks)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MrParks &raquo;</TD></TR><TR><TD CLASS="quote">i never really liked just putting holes in the rear bumper, this is the way i did mine and seem to work pretty well

</TD></TR></TABLE>
do u have a closer pic of those diffuser's?
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Old Apr 18, 2007 | 10:01 AM
  #46  
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Default Re: (H-T guy)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by H-T guy &raquo;</TD></TR><TR><TD CLASS="quote">would it look stupid if i did 2 rows of 1 1/2" holes. 20 holes total?
Im thinking about being creative with my holes.


Modified by H-T guy at 8:17 PM 4/17/2007</TD></TR></TABLE>
i always get creative with my HO'S,LOL
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Old Apr 18, 2007 | 10:27 AM
  #47  
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Default Re: (BOOSTIN1)

157 MPH with a full bumper cover intact...

...dunno if it is necessary...

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Old Apr 18, 2007 | 10:41 AM
  #48  
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Default Re: (Innes)

160mph car in front of you with holes....
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Old Apr 18, 2007 | 10:49 AM
  #49  
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Default Re: (MrParks)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by MrParks &raquo;</TD></TR><TR><TD CLASS="quote">160mph car in front of you with holes.... </TD></TR></TABLE>

and 100 more horsepower
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Old Apr 18, 2007 | 11:09 AM
  #50  
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Default Re: (Innes)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Innes &raquo;</TD></TR><TR><TD CLASS="quote">157 MPH with a full bumper cover intact...

...dunno if it is necessary...

</TD></TR></TABLE>

Like I said, I've tried it on much slower cars than yours and I saw an increase in MPH.
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