Adding downforce to stockbody FDs?
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Adding downforce to stockbody FDs?
What's the best way to add downforce to a stockbody FD? Or is there any kits that offer close-to-stock looks?
I'm looking to generate more downforce front, back and sides.
Pics of kits/wings/wingmirrors/anything appreciated
I'm looking to generate more downforce front, back and sides.
Pics of kits/wings/wingmirrors/anything appreciated
#6
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I would think that a setup such as the Enzo... would be risky on an FD. Enzo is a mid engine platform (i believe) and as such, the exhaust is very short. An FD with a full tray would have to figure out how to get the excess heat from the exhaust out of there efficiently. Aww screw it.... Just go side exhaust and flatten that (under)bitch out.
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There's a lot of legitimate looking cars that use rear diffusers. Are they only effective if the entire bottom of the car is flat?
Also looking to generate more downforce than stock
Maybe steal the viper ACR fins?
Also looking to generate more downforce than stock
Maybe steal the viper ACR fins?
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As far as I'm aware, the MazdaSpeed Rear diffuser and front undertray with the 99 spec front end have a proved effect on downforce. I'm running the above combo on mine, and on the occasions where I've temporarily removed the underbody gubbins, the car certainly feels a lot less stable at higher speed without them
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the 99 spec helps downforce. http://www.rx7.net.nz/newrx7.htm
they actually list the downforce/lift about halfway down, it does not give a speed though.
you also will notice please that the bigger the angle of the wing, the more downforce it has on the rear, but the more lift it gets on the front!
they actually list the downforce/lift about halfway down, it does not give a speed though.
you also will notice please that the bigger the angle of the wing, the more downforce it has on the rear, but the more lift it gets on the front!
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well, the main function of a full underbody splitter setup is to maximize the air flow velocity hence decreasing the pressure under the car. As a result of lower pressure under the car, you will be getting more downforce.
Back to OP's topic, if you want to keep your stock body look and increase some downforce, the best you can do is change the front bumper and get a good front splitter and add a small wing, such as the 99 spec or Mazdaspeed (aka Racing Beat Type II). If you want to stick with stock front bumper setup, just add a Mazdaspeed front lip or the 99 spec lip. For the side, you can add some skirts. The main purpose of adding side skirts is not hoping the pieces will generate much extra downforce directly, they are there to minimize the gap between the car and the ground to limit the amount of high air from flowing into the underbody. For the rear, a diffuser would be a good addition as well since it again increases the air flow.
BTW, you can also add some canards on the front bumper if you are aiming at tracks with more corners than long straight. Canards tend to generate lots of vortices on the side of the car hence giving you more drag so a bad choice for high speed tracks.
Hope this helps!
Back to OP's topic, if you want to keep your stock body look and increase some downforce, the best you can do is change the front bumper and get a good front splitter and add a small wing, such as the 99 spec or Mazdaspeed (aka Racing Beat Type II). If you want to stick with stock front bumper setup, just add a Mazdaspeed front lip or the 99 spec lip. For the side, you can add some skirts. The main purpose of adding side skirts is not hoping the pieces will generate much extra downforce directly, they are there to minimize the gap between the car and the ground to limit the amount of high air from flowing into the underbody. For the rear, a diffuser would be a good addition as well since it again increases the air flow.
BTW, you can also add some canards on the front bumper if you are aiming at tracks with more corners than long straight. Canards tend to generate lots of vortices on the side of the car hence giving you more drag so a bad choice for high speed tracks.
Hope this helps!
Last edited by JKL Racing Engineering; 12-17-08 at 01:45 PM.
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Last edited by cabaynes; 12-17-08 at 02:06 PM.
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#21
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I've driven my R1 and a good friend's touring (no lip or wing) back to back on long stretches of Texas highway, and his car felt VERY light over about 140mph, so much so that I backed out of it. My stock body R1 felt rock solid at 170mph.
#22
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Most of the front engine / rear drive STREET cars I've seen can't make use of a flat underbody where the exhaust and mechanicals are covered up. Not a problem on a race car where you can get around the challenges of heat management through clever building/engineering.
For street driving, I have never needed more downforce. Can't say I ever needed it on track either on my mildly prepared street car.
For street driving, I have never needed more downforce. Can't say I ever needed it on track either on my mildly prepared street car.
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R1 wing mounts too low to be in the effective region so it cant get enough air flow pressure. It might give you slightly more downforce but not significant enough to really help. Since its fairly thin so the drag it creates is also small due to the same reason, the wing is not in a clean air flow zone.
Last edited by JKL Racing Engineering; 12-18-08 at 01:10 PM.