View Poll Results: Which question should Tadge answer?
Voters: 153. You may not vote on this poll
Ask Tadge Poll: Ending 3 April, 2016
03-27-2016, 07:28 AM
#1
Tech Contributor
Thread Starter
Member Since: Mar 1999
Location: Northern VA
Posts: 10,060
Received 3,792 Likes
on
1,141 Posts
"Ask Tadge" Producer
Ask Tadge Poll: Ending 3 April, 2016
Vote for which of these 5 you'd like to have Tadge answer. The winner will be submitted Sunday, 3 April.
The questions are posted in the replies below, with links to their respective threads.
The questions are posted in the replies below, with links to their respective threads.
03-27-2016, 07:38 AM
#2
Tech Contributor
Thread Starter
Member Since: Mar 1999
Location: Northern VA
Posts: 10,060
Received 3,792 Likes
on
1,141 Posts
"Ask Tadge" Producer
PDR Timer Fix
Original question is here.
Poor-sha asked:
There appears to be an issue with the PDR system where it periodically and randomly winds back the lap timer while recording.
Multiple forum members have seen this happen and I've had this happen in both in my car and in the cars at Spring Mountain.
There is a detailed thread with screen captures already on the forum here: https://www.corvetteforum.com/forums/...e-anomaly.html.
You can see in this post https://www.corvetteforum.com/forums...post1591345523 a screen shot of the Cosworth toolbox. Look at the time delta line. It goes near vertical at about the 30 sec mark even though I’m still running normally.
Also, you can watch this video at around the 1:52 mark. Just watch it in ¼ speed and you can clearly see the lap time go from 21s to 19s.
https://youtu.be/PRsLojTdA6Q
Is GM aware of this problem and is there a fix in the works? It's not the sort of thing a dealer is going to be able to replicate or fix on their own.
There appears to be an issue with the PDR system where it periodically and randomly winds back the lap timer while recording.
Multiple forum members have seen this happen and I've had this happen in both in my car and in the cars at Spring Mountain.
There is a detailed thread with screen captures already on the forum here: https://www.corvetteforum.com/forums/...e-anomaly.html.
You can see in this post https://www.corvetteforum.com/forums...post1591345523 a screen shot of the Cosworth toolbox. Look at the time delta line. It goes near vertical at about the 30 sec mark even though I’m still running normally.
Also, you can watch this video at around the 1:52 mark. Just watch it in ¼ speed and you can clearly see the lap time go from 21s to 19s.
https://youtu.be/PRsLojTdA6Q
Is GM aware of this problem and is there a fix in the works? It's not the sort of thing a dealer is going to be able to replicate or fix on their own.
03-27-2016, 07:38 AM
#3
Tech Contributor
Thread Starter
Member Since: Mar 1999
Location: Northern VA
Posts: 10,060
Received 3,792 Likes
on
1,141 Posts
"Ask Tadge" Producer
Can "Performance Shift Active" Explained
Original question is here.
AllFlash asked:
Under certain conditions, accelerating ones Corvette will trigger 'Performance Shift Active' on Corvettes and a number of changes are observed, least of which is a delayed changing of gears in the A8 while acceleration or deceleration is present. Can you explain exactly what changes the car experiences, whether it be engine, transmission or suspension while 'Performance Shift Activated'...is active?
Under certain conditions, accelerating ones Corvette will trigger 'Performance Shift Active' on Corvettes and a number of changes are observed, least of which is a delayed changing of gears in the A8 while acceleration or deceleration is present. Can you explain exactly what changes the car experiences, whether it be engine, transmission or suspension while 'Performance Shift Activated'...is active?
03-27-2016, 07:39 AM
#4
Tech Contributor
Thread Starter
Member Since: Mar 1999
Location: Northern VA
Posts: 10,060
Received 3,792 Likes
on
1,141 Posts
"Ask Tadge" Producer
Drivetrain Efficiencies
Original question is here.
vader86 asked:
I am certain that since automakers continually chase efficiency, that certainly modern drivetrains are a little better now than they were even in the 80s or 90s. My question is whether the powertrain efficiencies have been improved over C5-C7 to reduce frictional and inertial losses and by how much quantitatively?
I am certain that since automakers continually chase efficiency, that certainly modern drivetrains are a little better now than they were even in the 80s or 90s. My question is whether the powertrain efficiencies have been improved over C5-C7 to reduce frictional and inertial losses and by how much quantitatively?
03-27-2016, 07:41 AM
#5
Tech Contributor
Thread Starter
Member Since: Mar 1999
Location: Northern VA
Posts: 10,060
Received 3,792 Likes
on
1,141 Posts
"Ask Tadge" Producer
Aero Properties of C7 Models
Original question is here.
descartesfool asked:
In order to better understand the performance differences and goals of the C7 models, could you detail the values for the lift and drag coefficients and frontal areas for the base, Z51 and various Z06 versions and front to rear downforce ratios and total downforce at speeds, Lift/Drag ratios, and why they were chosen?
In order to better understand the performance differences and goals of the C7 models, could you detail the values for the lift and drag coefficients and frontal areas for the base, Z51 and various Z06 versions and front to rear downforce ratios and total downforce at speeds, Lift/Drag ratios, and why they were chosen?
03-27-2016, 07:41 AM
#6
Tech Contributor
Thread Starter
Member Since: Mar 1999
Location: Northern VA
Posts: 10,060
Received 3,792 Likes
on
1,141 Posts
"Ask Tadge" Producer
PDR Pre-Record Button
Original question is here.
slickstick asked:
While the PDR is cool for the track, it would be nice if it had a street mode as well. It could be set to record constantly, and add a recording 'hotkey' to the infotainment home screen. If anything noteworthy happens on the streets, pushing the record button would instantly enter record mode, and with a configurable pre-record (ex: 30-60 seconds) would capture what happened prior to the button push.
Can this feature we added via software update? It seems very simple and straightforward to provide owners.
While the PDR is cool for the track, it would be nice if it had a street mode as well. It could be set to record constantly, and add a recording 'hotkey' to the infotainment home screen. If anything noteworthy happens on the streets, pushing the record button would instantly enter record mode, and with a configurable pre-record (ex: 30-60 seconds) would capture what happened prior to the button push.
Can this feature we added via software update? It seems very simple and straightforward to provide owners.