vortex generators - Page 2 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

racepar1 · 07-19-2008, 11:22 PM

Yes they work, yes they have been tested MANY times.

HyperTek · 07-20-2008, 02:48 AM

looking at the Sard units however, due to their size, maybe they are more like fins instead of vgs?

Def · 07-20-2008, 04:41 PM

Quote:

Originally Posted by HyperTek

looking at the Sard units however, due to their size, maybe they are more like fins instead of vgs?

And what is a "fin" supposed to do?

blownoffvalve · 07-20-2008, 09:12 AM

that's a lot of science.... but it's for going fast

g6civcx · 07-23-2008, 07:09 AM

Hill climb cars are a prime example of why you need wings above the roofline.

Their average speed is about 50-70mph depending on the car. In aero term, this is relatively slow. You don't start seeing an effect, if any, on factory style aeros until at least triple digits.

Even European car builders (who supposedly are the aero king) who make active aero don't make the active wing come out until close to 100mph. Below that all you're doing is creating drag without much downforce.

Look at the size and shape of their wings. Most of the stuff we see on production cars never work or do very little.

http://zilvia.net/f/showthread.php?t=204365

TheWolf · 07-23-2008, 05:06 PM

Before we got into a pissing match about the dictionary, we were talking about vortex generators.

I'd recommend anyone to attend the SAE :Fundamentals of Aerodynamics Applied to Race Cars Seminar done by Paul Glessner. It's about $700 and will give you access to tons of real world experience. What works and what doesn't. What's good on paper but sucky in the field.

The way paul explained this subject is. Most aero work can be done with tufts, tape, and a small camera. Sure tunnel testing is nice but most work can be done without smoke. Just tufts. Externally mount the camera on the area you want to monitor. Tuft it. Drive it. Review the data. Vortex generators are usually for hatch cars trying to get air on the spoiler. (notice RX7 being shown effective) Wing cars it's a issue as you don't want to stall the air around the wing or worse have your vortex end up lower than the wing and have neutral balance or even lift. If the area you are looking for information about can not be tufted. Try oil drop test. Since aero oil for the tests is pricey. He said red assembly lube (clevite bearing guard) is about the same consistency. One jewel that he passed was if you were looking to fudge a little and vortex generators were not allowed in your racing class. Apply a sticker there. Then stack about 6 more of the same sticker on top of the original. It will have a similar effect. Tuft it. Film it. Then decide.

iwishiwas-all* · 07-23-2008, 06:05 PM

how bout this , if anyone has a scale model of a 240 send it to me and ill stick it in our wind tunnel, which looks like 1/8th scale tunnel, orrrrrrrrrr buy me some vg's and ill tape wool strands all over my car and test the effects/ proper locations of the vgs for awesomeness..... USE ME AS YOUR TEST BED!! now go!

07-20-2008, 02:48 AM	#2
HyperTek Post Whore! Join Date: Mar 2003 Location: Cali Posts: 13,224 Trader Rating: (3) Feedback Score: 3 reviews	looking at the Sard units however, due to their size, maybe they are more like fins instead of vgs? __________________ Keep it Classy

07-23-2008, 05:06 PM	#6
TheWolf Zilvia FREAK! Join Date: Aug 2005 Location: Orange Park, FL (Jax) Posts: 1,468 Trader Rating: (0) Feedback Score: 0 reviews	Before we got into a pissing match about the dictionary, we were talking about vortex generators. I'd recommend anyone to attend the SAE :Fundamentals of Aerodynamics Applied to Race Cars Seminar done by Paul Glessner. It's about $700 and will give you access to tons of real world experience. What works and what doesn't. What's good on paper but sucky in the field. The way paul explained this subject is. Most aero work can be done with tufts, tape, and a small camera. Sure tunnel testing is nice but most work can be done without smoke. Just tufts. Externally mount the camera on the area you want to monitor. Tuft it. Drive it. Review the data. Vortex generators are usually for hatch cars trying to get air on the spoiler. (notice RX7 being shown effective) Wing cars it's a issue as you don't want to stall the air around the wing or worse have your vortex end up lower than the wing and have neutral balance or even lift. If the area you are looking for information about can not be tufted. Try oil drop test. Since aero oil for the tests is pricey. He said red assembly lube (clevite bearing guard) is about the same consistency. One jewel that he passed was if you were looking to fudge a little and vortex generators were not allowed in your racing class. Apply a sticker there. Then stack about 6 more of the same sticker on top of the original. It will have a similar effect. Tuft it. Film it. Then decide. __________________ Eye on the Prize

07-23-2008, 06:05 PM	#7
iwishiwas-all* Nissanaholic! Join Date: Mar 2004 Location: Oxford, UK/Miami Age: 37 Posts: 1,710 Trader Rating: (2) Rides Gallery: iwishiwas-all* Feedback Score: 2 reviews	how bout this , if anyone has a scale model of a 240 send it to me and ill stick it in our wind tunnel, which looks like 1/8th scale tunnel, orrrrrrrrrr buy me some vg's and ill tape wool strands all over my car and test the effects/ proper locations of the vgs for awesomeness..... USE ME AS YOUR TEST BED!! now go! __________________ IG @gabednconfused https://www.youtube.com/user/gabedm

07-19-2008, 11:22 PM	#1
racepar1 Post Whore! Join Date: Jul 2007 Location: Simi Valley, CA Age: 42 Posts: 9,006 Trader Rating: (106) Rides Gallery: racepar1 Feedback Score: 106 reviews	Yes they work, yes they have been tested MANY times.

07-20-2008, 09:12 AM	#4
blownoffvalve Leaky Injector Join Date: Oct 2006 Location: cali Posts: 108 Trader Rating: (0) Feedback Score: 0 reviews	that's a lot of science.... but it's for going fast

07-23-2008, 07:09 AM	#5
g6civcx Post Whore! Join Date: Apr 2004 Location: Virginia, USA Posts: 5,764 Trader Rating: (5) Feedback Score: 5 reviews	Hill climb cars are a prime example of why you need wings above the roofline. Their average speed is about 50-70mph depending on the car. In aero term, this is relatively slow. You don't start seeing an effect, if any, on factory style aeros until at least triple digits. Even European car builders (who supposedly are the aero king) who make active aero don't make the active wing come out until close to 100mph. Below that all you're doing is creating drag without much downforce. Look at the size and shape of their wings. Most of the stuff we see on production cars never work or do very little. http://zilvia.net/f/showthread.php?t=204365