# DIY Rear, anti airdam (top speed/track mod) **URL:** \ **Category:** Builds\ **Created:** [October 20, 2006, 8:24am UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056 "2006-10-20T08:24:13Z")\ **Posts on this page:** 16\ **Page:** 3
**Author:** ![newman](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/newman/32/7569_2.png) [@newman](https://forums.speedlife.net/u/newman)\ **Post date:** [November 17, 2006, 10:03am UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/41 "2006-11-17T10:03:20Z")
> [@Studderin](#): > > I should have quoted ^^ > > Last time I got data (the after). just about everything was differnt other then the color of the car. lol. word. ---
**Author:** ![avs](https://avatars.discourse-cdn.com/v4/letter/a/f475e1/32.png) [@avs](https://forums.speedlife.net/u/avs)\ **Post date:** [November 19, 2006, 1:39am UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/42 "2006-11-19T01:39:07Z")
Put this in the wind tunnel. ---
**Author:** ![Studderin](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/studderin/32/7197_2.png) [@Studderin](https://forums.speedlife.net/u/Studderin)\ **Post date:** [November 19, 2006, 1:55am UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/43 "2006-11-19T01:55:27Z")
you have one I can use? ---
**Author:** ![dmoffitt](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dmoffitt/32/7455_2.png) [@dmoffitt](https://forums.speedlife.net/u/dmoffitt)\ **Post date:** [November 19, 2006, 2:38am UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/44 "2006-11-19T02:38:03Z")
> [@newman](#): > > i’m not trying to be trouble, but why come and make an ambiguous claim and not back it up. holy shit I’m agreeing with newman (don’t worry I’ll go cut myself and cry in the corner later)… Mark no offense but you have QUITE the rep so far of doing this on NY Speed :gay3: - there’s a difference between :snky: and stupidly vague. If this is supposed to be a technical / DIY section, why post something you don’t want to discuss details about?? PS - my $.02 is that whether it makes a difference or not, it seems like an awfully large amt. of work for the time/$. Why not just get a junkyard bumper and cut holes, and swap it when you run at the track, if it really DOES help? ---
**Author:** ![neonglh](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/neonglh/32/4951_2.png) [@neonglh](https://forums.speedlife.net/u/neonglh)\ **Post date:** [November 19, 2006, 10:36am UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/45 "2006-11-19T10:36:36Z")
Fair enough. Sorry for being stupidly vauge. ---
**Author:** ![layzie](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/layzie/32/7599_2.png) [@layzie](https://forums.speedlife.net/u/layzie)\ **Post date:** [November 19, 2006, 8:23pm UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/46 "2006-11-19T20:23:53Z")
> [@newman](#): > > i’m not saying that it’s guaranteed not to work, but you can’t just say that something works and expect eeryone to accept it, based on your word alone. > > However, don’t you think that automakers, who spend millions developing aerodynamics, using advanced testing methods would have looked into doing something like this? The part would cost the automaker a dollar per vehicle. > > All i am saying is that i am smarter than you. If you’ve learned that lesson, then we’re both on the same page. correction Honda already has a part similar to this but nicer ---
**Author:** ![MaximaSE98](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/maximase98/32/7600_2.png) [@MaximaSE98](https://forums.speedlife.net/u/MaximaSE98)\ **Post date:** [November 19, 2006, 8:25pm UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/47 "2006-11-19T20:25:39Z")
that part is totally different from an engineering and aerodymanic standpoint…its not jsut a flat piece it has rigdes and egdes to create Downforce ---
**Author:** ![layzie](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/layzie/32/7599_2.png) [@layzie](https://forums.speedlife.net/u/layzie)\ **Post date:** [November 19, 2006, 8:39pm UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/48 "2006-11-19T20:39:57Z")
its different but yet similar, it has the same idea just better designed ---
**Author:** ![The\_Russian](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/the_russian/32/7414_2.png) [@The\_Russian](https://forums.speedlife.net/u/The_Russian)\ **Post date:** [November 19, 2006, 8:46pm UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/49 "2006-11-19T20:46:53Z")
it has an R and D department behind it, with a wind tunnel ---
**Author:** ![MPD47](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mpd47/32/7383_2.png) [@MPD47](https://forums.speedlife.net/u/MPD47)\ **Post date:** [November 19, 2006, 8:49pm UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/50 "2006-11-19T20:49:55Z")
That honda piece creates no downforce. Reduces drag, yes, creates downforce? :lol: ---
**Author:** ![Studderin](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/studderin/32/7197_2.png) [@Studderin](https://forums.speedlife.net/u/Studderin)\ **Post date:** [November 19, 2006, 9:51pm UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/51 "2006-11-19T21:51:20Z")
Ya, layzie what car is that on. I think I read somwere looking for into on this the newer acura TLs have a rear end pan whatever? And some GP guys were saying the 04+ GTP/GXP compG have a differnt rear bumper cover. That gose under the car far. And is sealed up for air getting trapped in the rear bumper. Same idea ---
**Author:** ![layzie](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/layzie/32/7599_2.png) [@layzie](https://forums.speedlife.net/u/layzie)\ **Post date:** [November 19, 2006, 10:07pm UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/52 "2006-11-19T22:07:06Z")
thats on a 92-95 civic hatchback ---
**Author:** ![Studderin](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/studderin/32/7197_2.png) [@Studderin](https://forums.speedlife.net/u/Studderin)\ **Post date:** [November 19, 2006, 10:38pm UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/53 "2006-11-19T22:38:47Z")
who makes that? link? any more info on it? you knew about it the whole time ---
**Author:** ![layzie](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/layzie/32/7599_2.png) [@layzie](https://forums.speedlife.net/u/layzie)\ **Post date:** [November 19, 2006, 11:13pm UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/54 "2006-11-19T23:13:43Z")
oem product. ya ive known about it ---
**Author:** ![articzap](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/articzap/32/7361_2.png) [@articzap](https://forums.speedlife.net/u/articzap)\ **Post date:** [November 19, 2006, 11:17pm UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/55 "2006-11-19T23:17:34Z")
it COULD increase downforce IF the air under car would be allowed to travel faster ---
**Author:** ![newman](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/newman/32/7569_2.png) [@newman](https://forums.speedlife.net/u/newman)\ **Post date:** [November 20, 2006, 5:19am UTC](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056/56 "2006-11-20T05:19:40Z")
you can definitely create downforce with a properly designed underbody. you can also create lift or add drag with a poorly designed one. I am not saying that you can’t do it, but based on a few courses i have taken in fluid mechanics/gas dynamics, it appears that your part will perform as the latter. [Previous page](https://forums.speedlife.net/t/diy-rear-anti-airdam-top-speed-track-mod/19056.md?page=2)