sorry, just came across this... don't mean to post-wh*re...

http://www.mulsannescorner.com/cadillaclmp02-d.html

good shots of diveplanes that are obviously intended for downforce.

 

malcolm: i dont know it's a small world or what but i remember 2 years ago you gave me great information and advice about car aerodynamics( vented hoods etc) , he thought me of using a gurney lid( forgot what is it called) to create a low pressure area to make vented hood work better. I was having a FC before and i know u raced one too before upgrading to a corvette =). great to see you here again , it's so awesome. you have a s2000 now?

and i can vouch for malcom as i've seen him give superb advise in rx7 forums before. thanks a lot again for your help here

will really appreciate it if you can contribute some wing design and what is there on the market that works and what not and your idea about how it can help a car on the track instead of a drag

=)


ps malcom: my S handles great on low to mid speed corner , super neutral feeling . it's just the high speed sweepers that made the rear a bit floating feeling. if there is any info or thread i can read up about pls share it with us.

 

while reading i came across this , malcolm contributed to this thread as well.

http://www.casc.on.ca/forums/showthread.php?t=10286

hope this is useful for some of you track junkies like me =)

 

thanks for the vouch, J.

It just sounds like you need some rear downforce. If you don't want to worry about getting huge downforce and just want a little bit of stabilization, then maybe think of a small spoiler, like 2" high. It will just help the aero-balance a bit, and you won't have to worry about mounting huge wings and sorting out front splitters, diffusers or diveplanes. I had the same feeling with my RX7 the first weekend I had it out. At 120 mph it felt like the rear was almost off the ground... a small spoiler solved that problem, and made it super-stable.

no, sadly I don't have an s2000... I would LOVE one though. When I instructed CThree at Shannonville, I had to take it out for a few laps to feel out the car (school rules... haha). I've driven a stock one before and thought it was divinely created... that one was just awesome. Bit of an aero-push, and mechanically loose, but with softer rear springs and a front splitter, that thing would be perfect.

 

wow even without a s2k , you are contributing in this forum * many thanks*

the thing is there is some really cheap wing to ridiculously expensive wing in the market and i know i am at no point to make 1 myself hence will really appreciate feedback from you since u've driven a lot of different cars with different aerodynamic mod on it.

i don't know of any small wing that comes to my mind. at the moment the one i think that will work is the APR GTC-200 , or which in the APR website u think is good enough? or you have other good company to recommend?

or u think by slapping on a set of springs and front splitter will solve my problem?

here is the wing i'm talking about





or http://www.aprperformance.com/index.php?op...id=36&Itemid=44

and the front splitter that i found too

 

sorry, i don't know much about the APR catalogue. I know cthree bought a great little wing for his S2000. It's a good shape, and if you replace the endplates and add a Gurney lip, it would be an awesome wing. My friend has the APR GTC-300 I think, and it is a pretty damn good wing... Not amazing, but better than most. From what I can recall, the 200 has a pretty bad profile.

 

malcolm,

What mikegarrison said is correct. I am a mechanical engineer myself. More specifically, I currently work at a racing company where we tune high end race cars for FIA GT all the way to LeMans and even Formula 1.

The canards do not provide much downforce by their surface area, they generate vortices which that goes down the sides of the car to keep the high-pressure region around the car from going to the underbody region of the car (where is low in pressure). It is in my opinion more of a preventive measure to maintain downforce rather than a a "provider" in my opinion. What you stated are valid as well, but in my opinion that is not their primary function.

Either way, it seems you are very experienced in motorsports in ontario. I am in ontario as well, hopefully one day I can see you at the tracks.

 

Yes, I didn't mean that they provide no downforce themselves, but their main purpose in the aero design package is as VGs. If there is no aero design package (as in, "well race cars have them so I'm going to have them on my car"), then their effect is rather unpredictable. VGs are a fine tuning device, but fine tuning can make things get better or get worse.

Since we are discussing credentials, I'm not a racer nor a Mech E. I am an Aero-Astro engineer, who works for a commercial airplane company.

 

Multimatic?

we used your shaker rig a few months ago and then went from Penske to Dynamic; been fairly good so far

better than the Penskes anyway.

 

Great info! Now if I could only find some Alumalite down here in Miami, FL....