I am planning to add some functional aero mods to my CRX track car. However it is really well balanced and I don't want to screw that up. So I want to start with a front splitter and then add an adjustable rear wing. Since I can't predict how much downforce I need to balance the splitter, I think adjustable is a good place to start. I can then cut it down or make a bigger one if I need to.

Does anyone have pictures or links to an adjustable rear wing? Ideas? Also, I'm going to have to search for mounting spots for the front undertray. Any experience with this is welcome. Thanks!

 

being a good deal of the smarter members arn't around anymore, be ready for a wave of "you don't need a wing RIc3r!11"

Ignore those children.

As far a good wing for a road racing setup i'm not 100%.

I'd look into road racing auto X forum. for some extra help.

 

Yeah, the only competitive advantage the CRX has is in handling. If you can increase downforce you will increase your cornering speed, plain and simple. Obvious start is the front, but I am certain I will have issues with the rear if I don't balance it. I'll check in the racing forum as well. Thanks!

 

what are your plans for a front airdam/splitter?

 

http://www.roadracegear.com

I have yet to do any aero mods for the track and before I did anything I would talk to some real racers at the track.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX Toad &raquo;</TD></TR><TR><TD CLASS="quote">before I did anything I would talk to some real racers at the track. </TD></TR></TABLE>

Not sure what you mean by real racers, but I assume you mean other people racing CRXs. There aren't any in NASA MW or OH/IN. And SCCA doesn’t allow wings or splitters (you can run an air dam). I have talked to a lot of other FWD racers as well as King about the splitter, and it is definitely a good idea for any FWD car - even at high speed courses like RA. The question is handling balance which is also a factor of which springs, swaybars, and tires you run.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by STREETWERKZ &raquo;</TD></TR><TR><TD CLASS="quote">what are your plans for a front airdam/splitter? </TD></TR></TABLE>

The plan I talked to King about was to cut my own splitter from plywood (or hopefully a plastic based paneling) and mount it below the stock dam. This keeps points down and allows me to load it on the trailer. It is low enough already that I believe a 2” splitter and the tray will be very effective. Making it myself also makes it easier to replace when it gets damaged – and it will. The only hard part will be finding a place to secure it. If anyone has pictures of their tray or even the underside of the CRX it would be great. (My car is off-site except weekends – hard to ‘research’).

 

I'm not sure about the CRX, but in my 240 fastback, air never touches the rear glass, which can be seen when it rains and you're going down the road. The drops stay in place. So on my car, I would have to have a wing that actually caught the air stream to have any effect. That would be a good place for you to start. Figuring out how high it would need to be to catch the air in the first place. You can make your wing adjustable with simple mods. I remember years ago in Super Street, or Honda Tunning they had an article about it. Using threaded rod, aluminum angle, and so forth.

 

Most likely an off the shelf one like this would work even though it looks tacky as hell.



Personally, I would play with an adjustable front splitter, and perhaps canards to see what kind of effects it had before I went on to the rear... Just my opinion though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX Toad &raquo;</TD></TR><TR><TD CLASS="quote">http://www.roadracegear.com

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i ordered my front lip and splitter earlier this week.

 

Yup yup get a front lip that'll help,depending on what rims you use try some 5mm wheel spacers i use off set wheels instead of spacers now but spacers help to a degree...MOE@HYPER16VALVE...

 

You don't need a wing ricer!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rainy City &raquo;</TD></TR><TR><TD CLASS="quote">You don't need a wing ricer!

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lol, I would normally say that. Even in a racing application, I think for the most part a rear spoiler would have mostly negative effects on a front wheel drive. If you're seeing 150 mph, it will help with stability... Other than that, you want to keep the rear kind of light to keep the corner happy nature of our lighter FF cars. Try to stay away from spacers too, get some new wheels with a smaller offset, you'll be safer that way, and spacers may not be allowed by the Techs...

Just out of curiosity, what kind of suspension mods do you have? Have you thought about putting high density foam in the rocker panels, and A, B, and C pillars? That will help tighten things up a bit as far as flex goes.

 

Well, the car was raced very sucessfully in ITA. It has over 20 podium finishes in SCCA Regional events. But I can now prep it to different rules and am 100% convinved of the effectiveness of a splitter. I don't hear anyone arguing that, so I'll assume everyone agrees.

I will build the splitter as best I can to maximize the front grip. But once that is done it is basically a fixed unit. Suppose I show up at the next event and the front sticks like glue but the back won't stay behind me? I'd probably have to pack up and go home. I can't afford that mistake. Testing would be ideal, but there is no time for that.

OTOH, if I have some way to adjust the rear downforce then I have a chance to correct the problem. I can reduce it for more rotation, increase it for more stability, or even remove it - all right at the track! I also have a data acquisition system so I can actually compare cornering speeds with hard data. If the wing isn't needed I have no problem running without it.

 

did that car use to be yellow and running ita in GA?

 

I wouldn't be so worried about downforce as I would lift (concerning the front end). The way I look at wings on Hondas isn't for cornering, but stability under heavy braking, such as on a long straight.

 

I had some ideas for an adjustable rear spoiler a few years ago and here is the thread I had going. I ended up purchasing some acme thread electric motor driven seat adjusters but never continued with the project.

http://crx.honda-perf.org/foru...ight=

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rbwdriven &raquo;</TD></TR><TR><TD CLASS="quote">did that car use to be yellow and running ita in GA?</TD></TR></TABLE>

No. It has been run in CenDIV as #19, and I think it was always red.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Aquafina &raquo;</TD></TR><TR><TD CLASS="quote">I wouldn't be so worried about downforce as I would lift (concerning the front end). The way I look at wings on Hondas isn't for cornering, but stability under heavy braking, such as on a long straight.</TD></TR></TABLE>

You can look at it that way, sure. Most decently designed (aero-wise) street cars are only making 100lbs or so of downforce, much less than racecars. (Cars like the Enzo are an exception!) The Exige, for instance, is under 100lbs on both ends if I remember right. Compare that to say, an MR2 Spyder, which as far as I know has little attention to downforce. The Spyder may have 200lbs of lift. So the net difference is 300lbs of 'downward' force on the cars' tires. Even if your mods negate lift (and have no net 'downforce') you've come out ahead.

I look at it in components. Any car's basic shape is going to create lift. A splitter, wing, and tray each create some amount of downforce. Whether you have overall lift or downforce depends on if all the downforce items can overcome the lift. Even if they don't, you will certainly have LESS lift.

Then there is drag... Anyone have a wind tunnel?

 

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

Then there is drag... Anyone have a wind tunnel?</TD></TR></TABLE>


i have a really strong box fan in my garage.

 

I have access to a small wind tunnel. Not sure what scale it is though.

 

hasport recently featured there crx in a SCC magazine race that had some canards and a wing, there design might be helpful but keep in mind they were also pushing a k swap and probably had uber suspension mods done also

 

And J's racing makes one for the crx.

 

kinda off topic, sorry, but, the roadracegear, how low does it sit from the ground? i would love it for my dd, but dont know but ground clearance.. thanks!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crazykamper &raquo;</TD></TR><TR><TD CLASS="quote">kinda off topic, sorry, but, the roadracegear, how low does it sit from the ground? i would love it for my dd, but dont know but ground clearance.. thanks!</TD></TR></TABLE>


probably not good for a street car. it sits LOW.


i'll send you some pics when mine gets delivered. i paid for it earlier this week.

 

if you are looking for a wing pm H-T username Rodney he had a bunch (I think he still has them at a super good price) of J's racing wings, they are discontinued aluminum ones (they switched to CF) These are actually functional real nice pieces, very expensive originally, here's a pic on the ats usa car