|
Tracking / Autocross / HPDE / Drifting What these cars were built for! |
|
Thread Tools | Search this Thread |
02-16-2021, 04:43 PM | #1 |
Join Date: Feb 2021
Drives: 2013 Subaru BRZ
Location: Indianapolis
Posts: 13
Thanks: 1
Thanked 59 Times in 10 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
Shave Seconds Off Your Lap Times by Adding Aerodynamics
Testing Goals
The goal of the tests was to quantify track times before and after adding our aerodynamic parts to the car. There are 2 different drivers; one a professional driver and the other an average track enthusiast. This was to show how track times change with two different drivers of different skill sets. We also wanted to see how aerodynamic components can impact lap times for two different drivers with different skill sets. Setup The customer BRZ was setup with laser ride height sensors and an AIM Evo 5 for data acquisition. This allows us to quantify the lap time differences, estimate downforce levels, and visually see the differences in lap times from setup to setup as well as driver to driver. Drivers Dan Clarke – Professional race car driver who has driven in many racing series
Dan also works as a driving coach at Putnam Park Road Course. Justin Green – Average track car enthusiast and owner of the test car.
Dan Clarke No Aero vs Verus Aero Verus Aero Added:
Best Lap WITHOUT Verus Engineering Aero 1.20.636 Best Lap WITH Verus Engineering Aero 1.19.386 Lap time improved by 1.25 seconds Orange is lap with Verus Aero Blue is lap without Verus Aero The car had 3 laser ride height sensors installed where the ride heights at the tire center can be calculated. See our video of how laser ride heights work
. The ride height sensors allow us to write math channels to calculate downforce. The easiest place to calculate downforce would be the straight while the car is still at full throttle, no braking, and no steering input. At the end of the straight, we are calculating around 380lbs of downforce at 110mph. Orange is lap with Verus Aero Blue is lap without Verus Aero The ride heights throughout the lap are lower with the Verus Engineering aero. We then calculated average downforce throughout the lap. The average downforce increase compared to no aero throughout the lap is 230 lbs! Orange is lap with Verus Aero Blue is lap without Verus Aero Orange is lap with Verus Aero Blue is lap without Verus Aero
Orange is lap with Verus Aero Blue is lap without Verus Aero
Justin Green No Aero vs Verus Aero The data on the enthusiast driver was much more difficult to decipher. The ride heights were more erratic so I would not trust the numbers as well compared to Dan’s ride height data which was more consistent. Because of this, I will emit the downforce numbers for this. However, visually the ride heights are lower throughout the long front straight (purple and light blue are lower). Dark Blue is lap without Verus Aero Purple is with Verus Aero Light Blue is Verus Aero and swapping High-Efficiency wing for UCW The ride heights throughout the lap are lower with the Verus Engineering aero. We then calculated average downforce throughout the lap compared to no aero. The average downforce throughout the track is 140 lbs. This is lower than Dan which makes sense as Dan carried more speed throughout the track, thus generating more downforce. Dark Blue is lap without Verus Aero Purple is with Verus Aero Light Blue is Verus Aero and swapping High-Efficiency wing for UCW Conclusion Ultimately Dan preferred our High-Efficiency Rear Wing compared to the other wings we tested. It also resulted in the fastest time around the track. The reduced drag and high efficiency of the rear wing compared to the other units tested proved to be the best setup for this specific front aero package and Dan’s driving style. Justin preferred substantially more rear downforce and was more confident with our UCW rear wing. Justin was able to reduce his lap times further with the UCW than with the High-Efficiency Rear Wing due to his driving style and the increased confidence the UCW unit offers him. Justin reduced his lap times by an *additional* 0.671 seconds with the UCW off the setup with the High-Efficiency Rear Wing. |
The Following 8 Users Say Thank You to Clay_from_Verus For This Useful Post: | captain awesome (02-18-2021), Cephas (02-27-2021), dsc_pat (03-14-2021), Dzmitry (03-17-2021), Hostile_Kittens (02-18-2021), Jdmjunkie (02-16-2021), Lonewolf (02-27-2021), timurrrr (03-15-2021) |
02-16-2021, 04:59 PM | #2 |
Senior Member
Join Date: Jan 2021
Drives: 2020 86
Location: North VA
Posts: 183
Thanks: 39
Thanked 49 Times in 28 Posts
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
|
Just curious, what was Justin's stock time, UCW time and HE time?
|
The Following User Says Thank You to Jstyle For This Useful Post: | Danny318 (07-02-2021) |
02-17-2021, 11:13 AM | #3 |
Join Date: Mar 2015
Drives: BRZ, STI, GT350R, Supra, 987.2
Location: Indiana
Posts: 1,146
Thanks: 567
Thanked 2,529 Times in 780 Posts
Mentioned: 87 Post(s)
Tagged: 3 Thread(s)
|
|
02-17-2021, 11:20 AM | #4 |
Senior Member
Join Date: Sep 2012
Drives: 13 White MT FR-S
Location: Gastonia, NC
Posts: 1,840
Thanks: 975
Thanked 1,127 Times in 521 Posts
Mentioned: 41 Post(s)
Tagged: 0 Thread(s)
|
what is #6 call out?
__________________
|
02-17-2021, 12:50 PM | #5 |
Senior Member
Join Date: Oct 2016
Drives: 2016 Scion FRS / Chevy Colorado
Location: Ohio
Posts: 638
Thanks: 51
Thanked 535 Times in 298 Posts
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
|
I'd assume the same, T9 is a long right hand sweeper so ability to stay in throttle longer without having to light to manage rear stability
__________________
Kyle H. - #89 STX
|
02-18-2021, 09:11 AM | #6 |
Join Date: Feb 2021
Drives: 2013 Subaru BRZ
Location: Indianapolis
Posts: 13
Thanks: 1
Thanked 59 Times in 10 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
|
02-18-2021, 09:12 AM | #7 |
Join Date: Feb 2021
Drives: 2013 Subaru BRZ
Location: Indianapolis
Posts: 13
Thanks: 1
Thanked 59 Times in 10 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
|
02-21-2021, 06:25 PM | #8 |
Senior Member
Join Date: Sep 2018
Drives: 13 Viper; 14 BRZ; 90 Miata; 18 AMG
Location: TX
Posts: 304
Thanks: 65
Thanked 187 Times in 103 Posts
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
|
Were you able to calculate front downforce?
I have APR wing, but I'm almost certain I'd be faster without it unless I got more front aero. I just have a small APR carbon splitter.
__________________
2014 BRZ: Full track car. Gutted, caged, coilovers, AP enduro, OMP, bolt ons, aero, etc,
2013 Viper GTS : Tractive Coilovers, ACR sway bars, aero, carbon, exhaust, etc. 1992 NA Spec Miata: 1.6 + 1999 NB Spec Miata: 1.8 w/ all the goodies. 2018 GLE 63 AMG: +800hp whistling AWD TT V8 grocery getter 2016 GX460: IDK. Too reliable to sell. Too boring to use. |
02-25-2021, 07:34 AM | #9 |
Join Date: Feb 2021
Drives: 2013 Subaru BRZ
Location: Indianapolis
Posts: 13
Thanks: 1
Thanked 59 Times in 10 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
|
We just calculated the total downforce on track, but attached is our informative packet that goes over our Ventus aero packages.
|
The Following User Says Thank You to Clay_from_Verus For This Useful Post: | GrandSport (02-25-2021) |
02-25-2021, 01:16 PM | #10 |
Senior Member
Join Date: Sep 2018
Drives: 13 Viper; 14 BRZ; 90 Miata; 18 AMG
Location: TX
Posts: 304
Thanks: 65
Thanked 187 Times in 103 Posts
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
|
Really impressive.
__________________
2014 BRZ: Full track car. Gutted, caged, coilovers, AP enduro, OMP, bolt ons, aero, etc,
2013 Viper GTS : Tractive Coilovers, ACR sway bars, aero, carbon, exhaust, etc. 1992 NA Spec Miata: 1.6 + 1999 NB Spec Miata: 1.8 w/ all the goodies. 2018 GLE 63 AMG: +800hp whistling AWD TT V8 grocery getter 2016 GX460: IDK. Too reliable to sell. Too boring to use. |
03-14-2021, 10:37 AM | #11 |
Senior Member
Join Date: Feb 2014
Drives: Too fast
Location: Canada
Posts: 134
Thanks: 202
Thanked 93 Times in 53 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
|
Amazing info. Thank you so much for sharing.
Goes to show how valuable good aero parts are on track compared to useless exhaust and intake, sometimes heat-screwing mods. |
03-16-2021, 03:43 PM | #12 | |
Senior Member
Join Date: May 2019
Drives: 2022 GR86
Location: Between Sonoma and Laguna Seca
Posts: 1,707
Thanks: 2,129
Thanked 1,297 Times in 718 Posts
Mentioned: 30 Post(s)
Tagged: 1 Thread(s)
|
Cool stuff!
Quote:
I presume the latter would give you other useful info that you could use for suspension tuning, and work better over uneven surfaces (kerbs?). |
|
The Following User Says Thank You to timurrrr For This Useful Post: | SCFD (03-19-2021) |
03-19-2021, 08:23 AM | #13 | |
Join Date: Jan 2013
Drives: Subaru
Location: Everywhere
Posts: 185
Thanks: 117
Thanked 227 Times in 103 Posts
Mentioned: 32 Post(s)
Tagged: 1 Thread(s)
|
Quote:
With 3 laser ride heights, we can calculate any point of the chassis/car and its height off the ground at any point on the track. This will include tire compression and suspension compression. So basically with lasers, if you know the spring rates and (estimate/calculate) tire spring rate, calculating downforce/estimated downforce is easier than with potentiometers. Potentiometers will only measure suspension compression or rebound and not take the tire into consideration. You would also need to find the motion ratio, which isn't difficult. At the end of the day, both can be used to do it. In our opinion (since we focus on aero development), lasers are easier and better for what we use them for. Lasers are also easier to switch from car to car than potentiometers (which is only an issue for a company or team). If you are an enthusiast looking for data on the track to tune and make your car faster, I'd go with potentiometers as they will allow suspension and aero tuning. That is if you can only do one or the other. Hopefully, that answers your question |
|
The Following User Says Thank You to plucas For This Useful Post: | timurrrr (03-19-2021) |
03-19-2021, 03:25 PM | #14 | |
Senior Member
Join Date: May 2019
Drives: 2022 GR86
Location: Between Sonoma and Laguna Seca
Posts: 1,707
Thanks: 2,129
Thanked 1,297 Times in 718 Posts
Mentioned: 30 Post(s)
Tagged: 1 Thread(s)
|
Thanks for the detailed answer!
I agree both can be used, and it makes sense that lasers are easier to switch between cars. Quote:
If you know the spring rate (hopefully it's linear), and adjust for the motion ration, you know exactly the weight/force applied at each corner. That value will is not going to be not affected by the compression of the tires. When calculating weight based on dynamic ride height, you have an unknown variable (tire compression) in the equation. I believe you need some kind of filtering/averaging whatever is it that you measure. |
|
|
|
Tags |
aero, aerodynamics, subaru brz, track testing, verus engineering |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Shave the Front Emblem? | Acree | Cosmetic Modification (Interior/Exterior/Lighting) | 37 | 01-24-2021 03:26 PM |
Will I have to shave my stock studs? | whitelightninn | Wheels | Tires | Spacers | Hub -- Sponsored by The Tire Rack | 3 | 07-16-2017 08:56 PM |
BRZ antenna shave? | Jman1759 | Cosmetic Modification (Interior/Exterior/Lighting) | 5 | 08-27-2014 04:05 PM |
Antenna Shave ? | SmsAlSuwaidi | Cosmetic Modification (Interior/Exterior/Lighting) | 9 | 10-09-2013 07:35 PM |
How can i shave weight? | fernan2 | BRZ First-Gen (2012+) -- General Topics | 15 | 11-01-2011 10:31 AM |