Originally posted by Matt Rowe@Sep 21 2005, 09:57 PM
Looking at putting in a cutoff date for car eligibility I looked at the recent results from the MARRS labor day event. Based on the results adding a cutoff date would result in the following percent reduction in the field.
Cutoff 30 25 20 15
ITS 12% 18% 18% 53%
ITA 7% 20% 47% 87%
ITB 53% 65% 76% 100%
ITC 8% 69% 85% 100%
So you can see that even a 25 year cutoff immediately decimates the ITB and ITC fields. ITA would be cut in roughly half in five years. Overall it looks like a cutoff date would significantly including several top ten cars in each ITB and ITC with only a 25 year cutoff.
I don't think an arbitrary year cutoff makes any more sense than using stock horsepower and curb weights to class cars. This is only one data point but I hope the ITAC, CRB does a lot of research before they put o lot of cars out to pasture.
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