C7 at the "ring"
Instructor
Joined: Jan 2007
Posts: 210
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Assuming the weight of the C7 Z51 will be close to the C6 Z51 (3300 or abouts) the ZL1 has it on power to weight (6.8 lbs/HP vs 7.4 LBS/HP). The Corvette has it on cg height. The Camaro has a lot more drag, but has larger tires. Not sure on down force. It will be interesting to say the least.
Safety Car
Joined: Aug 2012
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From: Danbury CT
Assuming the weight of the C7 Z51 will be close to the C6 Z51 (3300 or abouts) the ZL1 has it on power to weight (6.8 lbs/HP vs 7.4 LBS/HP). The Corvette has it on cg height. The Camaro has a lot more drag, but has larger tires. Not sure on down force. It will be interesting to say the least.
Melting Slicks
Joined: Aug 2005
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The 991S ran a 7:38 at the Ring and I seriously, seriously doubt that the C7 will be slower in any way.
Melting Slicks
Joined: Dec 2007
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From: Carmel CA
It has to be way better than that. If it's running close to Z06 times ,as GM says is happening at other tracks, then it'll be closer to a 7:35-7:40. This takes into account the C6Z's time being done over the full course, which generally adds about 5s vs today's timing method. Almost all times recorded today omit the ~200m stretch from the final corner to the new pit exit used by industry for staging laps.
Thread Starter
Melting Slicks
Joined: Jul 2007
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From: The Lost Borough, NYC
Melting Slicks
Joined: Aug 2005
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That would be true if Tadge hadn't mentioned to C/D that the C7 Z51 was running comparable times to the Z06(probably not the Z07) at VIR.
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Safety Car
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My bet is faster then the GS by a meaningful amount but a step behind the current Z.
Le Mans Master
Joined: Jul 2002
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Ron Fellows found about 4s on only a 1:3x track (Road Atlanta) between the Z06 on Goodyear F1s vs the Michelin PS2s, and the Pilot Super Sports are even faster than PS2s. It's got to be 10s faster minimum. Key to the MPSS is that it keeps its shape better (a flatter profile flush with the road) as it heats up.
Melting Slicks
Joined: Dec 2007
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From: Carmel CA
And yet you still cannot confirm the name of the company that provides the timing, nor can you explain how the ZR1 and GT-R have slightly different starting points.
Ron Fellows found about 4s on only a 1:3x track (Road Atlanta) between the Z06 on Goodyear F1s vs the Michelin PS2s, and the Pilot Super Sports are even faster than PS2s. It's got to be 10s faster minimum. Key to the MPSS is that it keeps its shape better (a flatter profile flush with the road) as it heats up.
Ron Fellows found about 4s on only a 1:3x track (Road Atlanta) between the Z06 on Goodyear F1s vs the Michelin PS2s, and the Pilot Super Sports are even faster than PS2s. It's got to be 10s faster minimum. Key to the MPSS is that it keeps its shape better (a flatter profile flush with the road) as it heats up.
http://www.mylaps.com/index.php/us_e...car/references
Le Mans Master
Joined: Jul 2002
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I've posted this before but you clearly did not read it. The company is Mylaps Pro Timing Systems. A company out of the Netherlands(next door to the Nurburgring). The ZR1 and the GTR do not have different starting points. You can clearly see it on the videos when both cars timing starts at the start ground loops and end at the finish line loops.
http://www.mylaps.com/index.php/us_e...car/references
http://www.mylaps.com/index.php/us_e...car/references
I posted this in the other thread, but you failed to address it:
Note how far forward the ZR1 is when the timer starts (0:00.1 elapsed on GM's timer). The GT-R is way back further when it has already registered 0:00.21 on Nissan's timer. Notice the dividing point between the white portion of the fence on the right vs "unpainted." The ZR1 is right upon it when the timer starts, the Nissan is much further away with 0:00.21 already elapsed.
Note the difference in accuracy of the timers. In the beginning, GM's timer shows 0.0s discrepancy against the independent timer. Nissan's shows a delta of 0.07s. By the end of the lap, GM's time shows a 1.245s delta. Nissan's delta is only 0.115s.
Here is the commentary supplied by the person who matched those videos to an independent timer:
"Here is a video combining the GT-R (7:29) run with the ZR1 run (7:26) at the 'Ring.
Both GT-R and ZR1 runs are using the original videos in their original timeline (no time stretching). Both times are off with respect to each other. So I added a timer using Sony Vegas' timecode Video Event FX in its default settings.
The 2 videos were sync'ed at the point immediately before the 00:00:00 started to tick. It's also at this point where the Sony Vegas timecode was started. Actually, at this starting time, the ZR1 is already ahead (slight head-start). I could have used the landmarks to sync but I decided to trust the timings done by both GM and Nissan.
The Nissan timer is closer to the Sony Vegas timer (both end points). The GM timer seems to get an accumulated delay of a little more than 1 second. For example, when the ZR1 finished at 7:26.4, the Nissan timer was at 7:27.58 and the Sony Vegas timer was at 7:27.580. When GT-R finished at 7:29.03, Vegas timer was at 7:29.015. The best way to confirm which of these 3 timers is correct is to use your own stopwatch as this YouTube clip is played."
Le Mans Master
Joined: Jul 2002
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Carrera GT starting point (much closer to the GM starting point than the Nissan starting point).
Observe in the above picture that the Carrera GT has not yet cleared the pit-out wall edge and the clock already shows 0:00.20 elapsed. In the ZR1 video, the Corvette has already cleared that pit-out wall edge, with only 0:00.1 elapsed. @ 0:00.21 on the Nissan timer, the GT-R is nowhere near that pit-out wall edge.
Observe in the above picture that the Carrera GT has not yet cleared the pit-out wall edge and the clock already shows 0:00.20 elapsed. In the ZR1 video, the Corvette has already cleared that pit-out wall edge, with only 0:00.1 elapsed. @ 0:00.21 on the Nissan timer, the GT-R is nowhere near that pit-out wall edge.
