How much does your 60' effect trap speed?
Thread Starter
Pro
Joined: Jul 2003
Posts: 542
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From: MA
How much does your 60' effect trap speed?
Hi, I was having a discussion with a friend from work about this. My argument was that normally the car with the higher trap speed will make more power and be faster from a roll. He disagrees, saying that a good short time will lower your trap speed by 4 or 5 mph and therefore make the trap speed meaningless. If that's true, then why do I have 4 time slips, same car, same day, and same track. The only difference being the short time varies as much as .5 sec. Yet the trap speeds never vary more than 1mph. These were 1/8 mile runs.
TIA
TIA
Race Director
Joined: Jan 2003
Posts: 15,176
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From: State of Confusion
MPH reflects the available HP that you have on that run:
ET is a function of how-well you APPLY that power to the track via gearing, traction, chassis, driving-technique, etc.
You can get the same-car (with no changes between rounds ) to get 60'-times that vary better than a tenth of a second in back-to-back runs, yet record nearly identical MPH figures (adjusted only for atmospheric changes ), simply by staging the car differently.
I don't believe 1/8-mile or 1/4-mile data should have any-bearing on your findings.
ET is a function of how-well you APPLY that power to the track via gearing, traction, chassis, driving-technique, etc.
You can get the same-car (with no changes between rounds ) to get 60'-times that vary better than a tenth of a second in back-to-back runs, yet record nearly identical MPH figures (adjusted only for atmospheric changes ), simply by staging the car differently.
I don't believe 1/8-mile or 1/4-mile data should have any-bearing on your findings.
Team Owner
Joined: Nov 1999
Posts: 32,782
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From: Former NCM Drag Racing coordinator, National director Corvette Challenge Spring Hill, Tennessee: Whiting, New Jersey
Cruise-In VI Veteran
Cruise-In VII Veteran
MPH reflects the available HP that you have on that run:
ET is a function of how-well you APPLY that power to the track via gearing, traction, chassis, driving-technique, etc.
You can get the same-car (with no changes between rounds ) to get 60'-times that vary better than a tenth of a second in back-to-back runs, yet record nearly identical MPH figures (adjusted only for atmospheric changes ), simply by staging the car differently.
I don't believe 1/8-mile or 1/4-mile data should have any-bearing on your findings.
ET is a function of how-well you APPLY that power to the track via gearing, traction, chassis, driving-technique, etc.
You can get the same-car (with no changes between rounds ) to get 60'-times that vary better than a tenth of a second in back-to-back runs, yet record nearly identical MPH figures (adjusted only for atmospheric changes ), simply by staging the car differently.
I don't believe 1/8-mile or 1/4-mile data should have any-bearing on your findings.
Le Mans Master
Joined: Jun 2003
Posts: 9,251
Likes: 217
From: 2007 Nat'l Corvette Challenge 11.50 index Champ. New Jersey
A lower 60' time can lower your mph at the traps, but so can many other things such as shift speed & shift points.
Also, tire spin on the shifts (or launch) can inflate mph....
Ron
Also, tire spin on the shifts (or launch) can inflate mph....
Ron
