GM Inside News Forum banner
1 - 20 of 22 Posts

·
Registered
Joined
·
2,248 Posts
Just saw that and was getting ready to post it. Pretty sweet exhaust note.
 

·
Premium Member
Joined
·
5,146 Posts
Can someone tell me what a bloody truck is doing on the track when you're testing a car at 200+mph???
 

·
Registered
Joined
·
11,898 Posts
ha I noticed the truck too.

Is it really maxed out at 205? Is it drag-limited or redlined?
 

·
Registered
Joined
·
9,086 Posts
Can someone tell me what a bloody truck is doing on the track when you're testing a car at 200+mph???
That's the first thing I thought of also. One blowout at the wrong time and both people are instantly killed by running into that truck. It's not like doing 200mph is safe so why throw in added dangers?

On a side note the car looks to be super stable at speed. Look how often the driver keeps taking his eyes off the road to look at the digital speedometer that they have between the two. You can see his helmet constantly cranking to the right as the speed nears 205mph on the readout.
 

·
Registered
Joined
·
4,823 Posts
I just want to know how it handles at that speed.
 

·
Registered
Joined
·
2,248 Posts

·
Registered
Joined
·
9,086 Posts
For top speed attemps no it is NOT long enough. You would need a track like Nardo or the salt flats for any record speed attempt. Nardo while being only 7.8miles is different in that the track is perfectly round and in most cars the steering wheel does not need to be turned the place also has monster banking.

The ZR1 according to GM reached a top speed of 208mph, the 205 number was the average of two runs.
Longer doesn't mean a higher top speed. You can watch the digital speedometer and it is at 205.???? forever which means it was already topped out way before the next turn came into play. The salt flats would probably knock 20 mph off of that 205.
 

·
Registered
Joined
·
2,531 Posts
For top speed attemps no it is NOT long enough. You would need a track like Nardo or the salt flats for any record speed attempt. Nardo while being only 7.8miles is different in that the track is perfectly round and in most cars the steering wheel does not need to be turned the place also has monster banking.

The ZR1 according to GM reached a top speed of 208mph, the 205 number was the average of two runs.
This track is better suited to top speed attempts than Nardo is. They came onto the straight with 200 mph already and had 2.5 miles for the remaining 5 mph.

The banking at Nardo is a problem at high speeds because due to the centrifugal force the cars seemingly get heavier. This increases load on the tires and rolling resistance, reduces ground clearance and changes the aerodynamics.
 

·
Registered
Joined
·
2,265 Posts
This track is better suited to top speed attempts than Nardo is. They came onto the straight with 200 mph already and had 2.5 miles for the remaining 5 mph.

The banking at Nardo is a problem at high speeds because due to the centrifugal force the cars seemingly get heavier. This increases load on the tires and rolling resistance, reduces ground clearance and changes the aerodynamics.
Less steering input and steering angle all help in achieving higher top speeds. But you are right a better track would not have made any difference, several inside sources have said that the ZR1 has been computer limited to 210mph. Still its achieved top speed of 208 tops many other supercars.

It might be the track or it might be the suspension but from the two links the CZR1 looks to be the most stable at 200+mph speeds.

I found the the Lambo engineer quite funny, could it be that the Lambo guys have over rated their top speeds unlike the normally accurate Germans?

http://www.youtube.com/watch?v=XsL20Cejdjs
 

·
Registered
Joined
·
2,531 Posts
Less steering input and steering angle all help in achieving higher top speeds.
Well, at Papenburg you would achieve your top speed on one of the straight sections, so no steering at all and no centrifugal force. At Nardo there's the centrifugal force weighing down the car and still _some_ steering necessary.
 
1 - 20 of 22 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top