6speedonline's official 60-130, 1/4 Mile, and Standing Mile list
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From: Houston, TX
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Martin, I appreciate your expertise and our relationship as it's grown through the years via the TX2K GTR Nationals. I'm not interested in arguing with someone I consider a friend so I will just state facts. UGR has a proprietary shifting system that they install on the e-gear SL's, as you know, the e-gear is ARCHAIC as compared to the tranny in the GTR. If you've never ridden in an e-gear G, the feeling is similar to a 6-speed car in that you can feel full dis-engagement and subsequently full engagement of the clutch. When that thing re-engages, it's like a sledgehammer hitting the back of the car. That spike is a single point spike representative of the gear engaging and if you look at g's throughout the pull, they are in the 1.3-1.0 decreasing range as you'd expect. Additionally, these cars FIGHT for traction and the clutch is at the edge as well so movements in the longitudinal g's are to be expected IMO.
At TX2K12 I'll get you a ride in an e-gear g and you'll see what I mean, those things shift VIOLENTLY.
For what its worth, they ran a 3.21 60-130 in my 6-speed car today. Being that both cars were at similar power, but have diff gearing, my car is heavier than the SL (Kevin drove and KC was passenger) and it was more hot and humid today than a few days ago...the numbers jive. I will post the graph once I get the data.
See ya soon bud,
Peter
At TX2K12 I'll get you a ride in an e-gear g and you'll see what I mean, those things shift VIOLENTLY.
For what its worth, they ran a 3.21 60-130 in my 6-speed car today. Being that both cars were at similar power, but have diff gearing, my car is heavier than the SL (Kevin drove and KC was passenger) and it was more hot and humid today than a few days ago...the numbers jive. I will post the graph once I get the data.
See ya soon bud,
Peter
I really don't think it pulled 2.4 g's of acceleration, I don't think that's feasible on the street, especially with R888's (which are designed more for lateral acceleration, not longitudinal) which I've driven on a road course. For reference a Top fuel dragster pulls 4.5 G's
P-box uses GPS to calculate everything. There are no accelerometers. Any math majors or fellow engineers out there? Change in position over time = speed. Change in velocity over time = acceleration
The sampling rate of the GPS is in the P-box and all the other consumer grade devices from Race logic is 10hz, so 10 samples per second. This is taken right from the P-box specifications in the manual. Absolute positioning is 5m diameter (16.4 feet) 95% circle of error probability. Meaning that 95% of the positioning will be in a 16.4 foot diameter circle. They do say that distance measurement is accurate to within .05% But I just calculated the data from our V-box and P-box that were in our car on the exact same run, and the error is more than that.
The p-box and v-box is a great tool but the closer I look at our #'s and the discrepancies we showed when we ran both units in our car the same time, the more I see that if you're trying to get accuracy to the .1 of second or less, there could be some accuracy issues.
I've used a lot of different dataloging systems that use either GPS and/or accelerometers (Motec dash, AIM, Race Pack, p-box/v-box, Chase cam, Race keeper, etc) and that data is never 100% accurate or perfect, especially when compared to dedicated track timing equipment (road course or drag strip).
-Martin
P-box uses GPS to calculate everything. There are no accelerometers. Any math majors or fellow engineers out there? Change in position over time = speed. Change in velocity over time = acceleration
The sampling rate of the GPS is in the P-box and all the other consumer grade devices from Race logic is 10hz, so 10 samples per second. This is taken right from the P-box specifications in the manual. Absolute positioning is 5m diameter (16.4 feet) 95% circle of error probability. Meaning that 95% of the positioning will be in a 16.4 foot diameter circle. They do say that distance measurement is accurate to within .05% But I just calculated the data from our V-box and P-box that were in our car on the exact same run, and the error is more than that.
The p-box and v-box is a great tool but the closer I look at our #'s and the discrepancies we showed when we ran both units in our car the same time, the more I see that if you're trying to get accuracy to the .1 of second or less, there could be some accuracy issues.
I've used a lot of different dataloging systems that use either GPS and/or accelerometers (Motec dash, AIM, Race Pack, p-box/v-box, Chase cam, Race keeper, etc) and that data is never 100% accurate or perfect, especially when compared to dedicated track timing equipment (road course or drag strip).
-Martin
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Joined: May 2010
Posts: 267
From: las vegas
Rep Power: 54
Martin, I appreciate your expertise and our relationship as it's grown through the years via the TX2K GTR Nationals. I'm not interested in arguing with someone I consider a friend so I will just state facts. UGR has a proprietary shifting system that they install on the e-gear SL's, as you know, the e-gear is ARCHAIC as compared to the tranny in the GTR. If you've never ridden in an e-gear G, the feeling is similar to a 6-speed car in that you can feel full dis-engagement and subsequently full engagement of the clutch. When that thing re-engages, it's like a sledgehammer hitting the back of the car. That spike is a single point spike representative of the gear engaging and if you look at g's throughout the pull, they are in the 1.3-1.0 decreasing range as you'd expect. Additionally, these cars FIGHT for traction and the clutch is at the edge as well so movements in the longitudinal g's are to be expected IMO.
At TX2K12 I'll get you a ride in an e-gear g and you'll see what I mean, those things shift VIOLENTLY.
For what its worth, they ran a 3.21 60-130 in my 6-speed car today. Being that both cars were at similar power, but have diff gearing, my car is heavier than the SL (Kevin drove and KC was passenger) and it was more hot and humid today than a few days ago...the numbers jive. I will post the graph once I get the data.
See ya soon bud,
Peter
At TX2K12 I'll get you a ride in an e-gear g and you'll see what I mean, those things shift VIOLENTLY.
For what its worth, they ran a 3.21 60-130 in my 6-speed car today. Being that both cars were at similar power, but have diff gearing, my car is heavier than the SL (Kevin drove and KC was passenger) and it was more hot and humid today than a few days ago...the numbers jive. I will post the graph once I get the data.
See ya soon bud,
Peter
Former Vendor
Joined: Nov 2005
Posts: 840
From: Charlotte NC
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Thanks for all the compliments. We will head back out when needed and lower the ET. I was thinking about adding the carbon fiber seats, HRE carbon fiber wheels and losing KC out of the Superleggera on the next attempt. 
Banned
Joined: May 2011
Posts: 25
Rep Power: 17
Ferrari F150 Car with ALONSO behind the wheel, est 750 hp + 100 hp KERS , overall est 850 hp @ 615 kg with fuel...
96-209 kph = 2,6 seconds (60-130mph)
clean video- Speedo
http://www.youtube.com/watch?v=3nEfIomu4IM
same video, this time with acceleration data: time vs distance
http://www.youtube.com/watch?v=VGNRaNVDCTU
Summary: ( KERS is active above 110 kph)
0-100 kph 2.78s
0-160 kph 4.0s
0-100meters = 4.4s @ 174kph
0-200 kph 5.18s
1/8 mile = 6.2s @ 228 kph
0-240 kph 6.6s
0-270 kph 8.1s
1/4 mile = 8.95s @ 279 kph
0-500meters 10.2s @ 287kmh
Enjoy
96-209 kph = 2,6 seconds (60-130mph)
clean video- Speedo
http://www.youtube.com/watch?v=3nEfIomu4IM
same video, this time with acceleration data: time vs distance
http://www.youtube.com/watch?v=VGNRaNVDCTU
Summary: ( KERS is active above 110 kph)
0-100 kph 2.78s
0-160 kph 4.0s
0-100meters = 4.4s @ 174kph
0-200 kph 5.18s
1/8 mile = 6.2s @ 228 kph
0-240 kph 6.6s
0-270 kph 8.1s
1/4 mile = 8.95s @ 279 kph
0-500meters 10.2s @ 287kmh
Enjoy
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Joined: Jul 2008
Posts: 536
From: Istanbul Turkey
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Thread Starter
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Registered User
Joined: Jun 2005
Posts: 8,509
From: Virginia, USA
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His only run was faster than your first personal best (5.46), even though you were making more power, were running in cool temps, on were on an incline. So no, his time is not slow.
Only testing I have with the car right now is 2nd to 3rd and traction is very limited and my shift and respool was over .4 seconds. Happy with the time but no use of putting it up because I hope to crush that number when I'm no longer afraid to blow up 3rd gear if I power shift.
Thread Starter
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Registered User
Joined: Jun 2005
Posts: 8,509
From: Virginia, USA
Rep Power: 789
Just ignore Mert.
Last edited by Divexxtreme; Aug 27, 2011 at 04:14 PM.