Bracket Talk
Need math/stripe help

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https://drr.infopop.cc/eve/forums/a/tpc/f/75460652/m/1307032307

March 24, 2026, 11:07 AM
CURTIS REED
Need math/stripe help
Okay who took the stripe and by how much?

car 1 dial 6.18 et 6.17701 rt .05181

car 2 dial 5.71 et 5.74988 rt .00924
March 24, 2026, 11:36 AM
Lenny5160
Car 1 is representing a .04882 package.
Car 2 is representing a .04912 package.

Car 1 took the stripe by .0003.


Tony Leonard
March 24, 2026, 12:07 PM
CURTIS REED
Thanks Tony. Sometimes if I look at something long enough I can make it much harder than it needs to be. LOL
March 24, 2026, 12:37 PM
Lenny5160
Next time either take a little or give a lot. This position does you no good! Big Grin


Tony Leonard
March 24, 2026, 12:58 PM
1leg
how many feet is that .0003


Meziere Tech.
Make sure your water pump is on whenever you check your coolant level.
March 24, 2026, 01:06 PM
SlyFox
Assuming 105mph at the stripe;
1) 105mph x 5280 = 554,400 feet per hour
2) 554,400/60 = 9,240 feet per minute
3) 9,240/60 = 154 feet per second
4) 154 x .0003 = 0.0462 feet margin at stripe
5) 0.0462 x 12 inches = .5544 inches margin at stripe (slightly over a half-inch)


Mike
March 24, 2026, 01:49 PM
CURTIS REED
quote:
Originally posted by Lenny5160:
Next time either take a little or give a lot. This position does you no good! Big Grin


I was trying to take a little and got carried away and gave a little. LOL Luckily he broke out. Why I always think I need to take .005 when .015 will do I have no idea.



Jerry, in this case it was 0.5822256" he was 110.27

I have an excel file I made to figure that.
March 24, 2026, 03:45 PM
Lenny5160
quote:
Originally posted by CURTIS REED:
quote:
Originally posted by Lenny5160:
Next time either take a little or give a lot. This position does you no good! Big Grin


I was trying to take a little and got carried away and gave a little. LOL Luckily he broke out. Why I always think I need to take .005 when .015 will do I have no idea.



Jerry, in this case it was 0.5822256" he was 110.27

I have an excel file I made to figure that.


Technically you would use your MPH, since you crossed second. Not that it's gonna make a huge difference here.

I always say if you don't accidentally give it back once in a while, you aren't making it tight enough.

Same applies to the occasional red light.


Tony Leonard
March 24, 2026, 03:50 PM
CAD
Math here:
http://www.wallaceracing.com/mov-dist.php
March 24, 2026, 04:51 PM
CURTIS REED
quote:
Originally posted by Lenny5160:
quote:
Originally posted by CURTIS REED:
quote:
Originally posted by Lenny5160:
Next time either take a little or give a lot. This position does you no good! Big Grin


I was trying to take a little and got carried away and gave a little. LOL Luckily he broke out. Why I always think I need to take .005 when .015 will do I have no idea.



Jerry, in this case it was 0.5822256" he was 110.27

I have an excel file I made to figure that.


Technically you would use your MPH, since you crossed second. Not that it's gonna make a huge difference here.

I always say if you don't accidentally give it back once in a while, you aren't making it tight enough.

Same applies to the occasional red light.


Dang it. I just can’t help making myself look dumb today. Not an abnormal thing though. Laughing Hard
March 25, 2026, 11:09 AM
SlyFox
quote:
Originally posted by CAD:
Math here:
http://www.wallaceracing.com/mov-dist.php


I plugged .0003 and 105mph into that calculator and it gave me .55 inches. I was pretty damn close with my old school ciphering Smile


Mike
March 25, 2026, 11:17 AM
CURTIS REED
quote:
Originally posted by SlyFox:
quote:
Originally posted by CAD:
Math here:
http://www.wallaceracing.com/mov-dist.php


I plugged .0003 and 105mph into that calculator and it gave me .55 inches. I was pretty damn close with my old school ciphering Smile


Definitely close. I was 108.25
March 25, 2026, 01:16 PM
Thurston
Ok, for a real math dummy. Where did the .04882 package. 04912 package. numbers come from?
March 25, 2026, 01:41 PM
Lenny5160
quote:
Originally posted by CURTIS REED:
car 1 dial 6.18 et 6.17701 rt .05181

car 2 dial 5.71 et 5.74988 rt .00924


Car 1:

Reaction time: .05181
Variance from Dial: -.00299

To get the total package, we add these together.

.05181 + (-.00299) = 0.04882

Car 2:

Reaction time: .00924
Variance from Dial: .03988

.00924 + .03988 = 0.04912


Now, officially you can't call it a "package" if there was a breakout. That's a disqualifier. But we're just talking about track position here, so on the track it would appear that Car 1 is 0.04882 from perfect and Car 2 is 0.04912 from perfect.

The "Car 1" number is 0.0003 smaller, meaning they got to the finish line first by that margin.


Tony Leonard