1/2 Mile Roll Races at Gila Bend, AZ
08-24-2015, 02:06 PM
#81
It seems as though most of the half mile speed data (and roll race videos for that matter) have been cars with level 3 aero.
Has anyone compared half mile speeds for level 1 vs 3 on the same day? Are there any half mile speeds for a level one car at all?
Has anyone compared half mile speeds for level 1 vs 3 on the same day? Are there any half mile speeds for a level one car at all?
08-24-2015, 02:26 PM
#82
Team Owner
Actually, it is possible that the C7Z Cd (and thus total drag) increases relative to a C6Z. It appears that is happening as I have yet to see a C7Z come anywhere near 200 MPH.
This is a good read if you want some more information about what happens at high speeds:
http://www.civil.uwaterloo.ca/enve21...r_and_drag.pdf
Especially the "Variation of CD with Reynolds Number" section
This is a good read if you want some more information about what happens at high speeds:
http://www.civil.uwaterloo.ca/enve21...r_and_drag.pdf
Especially the "Variation of CD with Reynolds Number" section
The Z07 is a model that GM offers with more aggressive spoilers, splitters, etc to generate more down force, but with an increase in the coefficient of drag, but the top speed went down vs the base Z06.
The base C7 Z06 has lower top speed(by a lot) than the C6 ZR1 but with 12 additional horsepower. I don't see where the spoilers/splitters on the C7 Z06 are any more aggressive, and GM says they both have the same .35 Cd(and most likely the same frontal area).
I think Dave Hill did a better job of engineering the aero on the C6(and the Z06 and the ZR1) than Tadge did with the C7(and the Z06).
Last edited by JoesC5; 08-24-2015 at 02:28 PM.
08-24-2015, 04:11 PM
#83
With some good engineering, it shouldn't occur. Look at the Nissan GT-R Nismo. They added a very aggressive rear wing to increase downforce, but was able to maintain the .26 Cd(as the base GT-R)by redesigning the front and rear fascia's. The CdA didn't change and they didn't lose any of the top speed. Actually, the top speed went up from 192 to 195 with an additional 55 Horses, but with a rear wing that generated an additional 220 pounds of downforce over the base GT-R(with a different design rear spoiler).
The Z07 is a model that GM offers with more aggressive spoilers, splitters, etc to generate more down force, but with an increase in the coefficient of drag, but the top speed went down vs the base Z06.
The base C7 Z06 has lower top speed(by a lot) than the C6 ZR1 but with 12 additional horsepower. I don't see where the spoilers/splitters on the C7 Z06 are any more aggressive, and GM says they both have the same .35 Cd(and most likely the same frontal area).
I think Dave Hill did a better job of engineering the aero on the C6(and the Z06 and the ZR1) than Tadge did with the C7(and the Z06).
The Z07 is a model that GM offers with more aggressive spoilers, splitters, etc to generate more down force, but with an increase in the coefficient of drag, but the top speed went down vs the base Z06.
The base C7 Z06 has lower top speed(by a lot) than the C6 ZR1 but with 12 additional horsepower. I don't see where the spoilers/splitters on the C7 Z06 are any more aggressive, and GM says they both have the same .35 Cd(and most likely the same frontal area).
I think Dave Hill did a better job of engineering the aero on the C6(and the Z06 and the ZR1) than Tadge did with the C7(and the Z06).
http://katechengines.com/street_perf...a%20report.pdf
Last edited by jsiddall; 08-24-2015 at 04:20 PM.
08-24-2015, 05:53 PM
#84
Pro
1/2 Mile Roll Races at Gila Bend, AZ
Originally Posted by turbo8765
It seems as though most of the half mile speed data (and roll race videos for that matter) have been cars with level 3 aero.
Has anyone compared half mile speeds for level 1 vs 3 on the same day? Are there any half mile speeds for a level one car at all?
Has anyone compared half mile speeds for level 1 vs 3 on the same day? Are there any half mile speeds for a level one car at all?
08-24-2015, 11:30 PM
#85
Supporting Vendor
Looking forward to this again and than the week after 1320's street car takeover!! We always sponsor every omega event and last time had 37 customer cars out there tearing it up. This time we will have probably 45-50 lol. I encourage anyone out there to stop by our booth and say hi 
We love helping bring these amazing events to our great state and look forward to many more w/ Omega
We love helping bring these amazing events to our great state and look forward to many more w/ Omega
__________________
Cordes Performance Racing aka "CPR"
Owner of AZ's premier LSX/LTX motorsports shop
http://cordesperformanceracing.com/
www.facebook.com/cordesperformanceracing.com
joe@cordesperformanceracing.com
480-359-5914
Cordes Performance Racing aka "CPR"
Owner of AZ's premier LSX/LTX motorsports shop
http://cordesperformanceracing.com/
www.facebook.com/cordesperformanceracing.com
joe@cordesperformanceracing.com
480-359-5914
