All the cars, all the times

[txchemist]

A chart is worth a thousand words. The different lines cover Major process differences. For example: Street Stock has 4 major groups.of big building differences.( and with Princess and Cub cars in the mix, that is to be expected). Even the slowest car here could be a "District" winner

OPA is correct, Unlimited is the easiest way to look good, even the newcomers are in the same distribution.

Street Rod is VERY hard to master.

 

[DNA RACING]

naw, street rod is easy, just ask Stone Cold.....

 

[jmb]

Is that yellow line the Kinser line??

Cool graph, thanks for posting.

 

[OPARENNEN]

txchemist:

Great Chart. I tells a lot, once you study it.

Thanks a lot.

 

[datnr]

Cool chart,thanks!

I have have my work cut out for me

 

[MWDracing]

Love the Chart....
Thanks for posting it.

MWD

 

[txchemist]

You are all welcome!

For those not familiar with the cumulative distribution chart, it turns the typical bell curve (normal distribution) into a straight line and is useful in comparing data. The 50% cum line is the same as the average of the distribution You can compare big distributions like all these averages, or one car against another. The slope of the line best fitting the group is an indication of how controlled the process is. The top 10 or so car builders all have about the same tight control over there cars. A well built car that is tuned too much into the rail will have slower times, but will have less variation than a car running the same average because of poor alignment. Newcomers might not get better speed with a change in process, but if it gets more consistent, keep it and proceed from there. Write it down and a few changes down the road, come back to it and repeat it to make sure it really is an improvement. Some things you discover may need to get undiscovered when you make changes in other parts of the process.You should be convinced that you have not gone backwards when you deviate from the DD4H steps.. In fact, if you improved because you got better at building a car at the same time you changed a process chemical, you may forever get sent down a blind ally until you make a test car from time to time exactly as DD4H has shown and test it against your "good idea".