2013 San Diego National Tour - Toyota Yaris Forums

NJ Drive · 04-01-2013, 07:36 PM

Nice pick up Jason!

For those who don't know, Andy Hollis' latest tests prove that sunroof-optioned cars are quicker in a straight line. The vacuum effect created by the air moving past the open roof actually induces lift, which reduces tire rolling resistance, which allows the car to accelerate faster.

why? · 04-07-2013, 03:33 PM

Quote:

Originally Posted by NJ Drive

Nice pick up Jason!

For those who don't know, Andy Hollis' latest tests prove that sunroof-optioned cars are quicker in a straight line. The vacuum effect created by the air moving past the open roof actually induces lift, which reduces tire rolling resistance, which allows the car to accelerate faster.

That isn't surprising, and if you really wanted to you could create a spoiler on top to do the same thing. But i doubt you could make it effective enough to see any results at autocross speeds unless it was ridiculously aggressive.

Although you could make it adjustable, and have all sorts of fun figuring out what is the best effective setting for limiting drag and maximizing handling at the same time.

NJ Drive · 04-07-2013, 11:33 PM

Quote:

Originally Posted by why?

That isn't surprising, and if you really wanted to you could create a spoiler on top to do the same thing. But i doubt you could make it effective enough to see any results at autocross speeds unless it was ridiculously aggressive.

Although you could make it adjustable, and have all sorts of fun figuring out what is the best effective setting for limiting drag and maximizing handling at the same time.

If you look at the date I posted that, it will all become clear.

Jason@SportsCar · 04-09-2013, 03:22 PM

I have not finished processing my video from Saturday, its really long thanks to the slow car

, but here is my ride from Sunday:

http://www.youtube.com/watch?v=HR13U...ature=youtu.be

xnamerxx · 04-09-2013, 03:53 PM

I see you took the wide line into the turn around before the finish too. What the Prius wasn't engaging enough LOL.

Here's my fastest run but it was a RL. My fast clean run is really boring...compared to pretty boring for my fast run LOL. Really glad I hooked up the foot cam, my foot work sucks.

Me driving Left side RL
Left Side Fast

Co-Driver Left Side clean
Left Side Fast

Jason@SportsCar · 04-09-2013, 07:35 PM

The blistering fast

Prius C runs: http://www.youtube.com/watch?v=TjNY1...ature=youtu.be

Jason@SportsCar · 04-11-2013, 01:12 PM

Guest driver in the Pirus: http://www.youtube.com/watch?v=tIIGZ...ature=youtu.be

04-09-2013, 03:22 PM	#4
Jason@SportsCar Drives: 2015 H Production Yaris Join Date: Oct 2009 Location: Debary, FL Posts: 1,953	I have not finished processing my video from Saturday, its really long thanks to the slow car , but here is my ride from Sunday: http://www.youtube.com/watch?v=HR13U...ature=youtu.be __________________ 2005-2008 SCCA Solo BS National Champion 2017-2018 SCCA H Prod National Champion

04-09-2013, 07:35 PM	#6
Jason@SportsCar Drives: 2015 H Production Yaris Join Date: Oct 2009 Location: Debary, FL Posts: 1,953	The blistering fast Prius C runs: http://www.youtube.com/watch?v=TjNY1...ature=youtu.be __________________ 2005-2008 SCCA Solo BS National Champion 2017-2018 SCCA H Prod National Champion

04-11-2013, 01:12 PM	#7
Jason@SportsCar Drives: 2015 H Production Yaris Join Date: Oct 2009 Location: Debary, FL Posts: 1,953	Guest driver in the Pirus: http://www.youtube.com/watch?v=tIIGZ...ature=youtu.be __________________ 2005-2008 SCCA Solo BS National Champion 2017-2018 SCCA H Prod National Champion

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04-01-2013, 07:36 PM	#1
NJ Drive Drives: 2012 Yaris SE Join Date: Nov 2011 Location: Northern NJ Posts: 179	Nice pick up Jason! For those who don't know, Andy Hollis' latest tests prove that sunroof-optioned cars are quicker in a straight line. The vacuum effect created by the air moving past the open roof actually induces lift, which reduces tire rolling resistance, which allows the car to accelerate faster.

04-09-2013, 03:53 PM	#5
xnamerxx 0-60 in slow Drives: light blue liftback Join Date: Aug 2009 Location: so cal Posts: 926	I see you took the wide line into the turn around before the finish too. What the Prius wasn't engaging enough LOL. Here's my fastest run but it was a RL. My fast clean run is really boring...compared to pretty boring for my fast run LOL. Really glad I hooked up the foot cam, my foot work sucks. Me driving Left side RL Left Side Fast Co-Driver Left Side clean Left Side Fast