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The Art of Equalization: How IROC Maintained Fair Racing

18:04
25:34
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Ray Evernham's IROC Racecar Collection: Driven By The Most Legendary Names In Racing

What happens here

Ray Evernham elaborates on how IROC ensured fair competition by equalizing the cars. In the absence of modern measurement tools like laser scanners and coordinate measuring machines, mechanics at IROC relied on common sense, templates, tape measures, and dial calipers to build and adjust the cars. They would create a prototype car and then replicate its specifications across the fleet. Before each race, Ray's job involved shaking down all the cars to ensure they were mechanically sound and ready. Then, drivers like Dave Marcus and George Follmer would make final adjustments to match lap times. The unaerodynamic design of these cars inherently contributed to equalization, as they created significant drag, allowing for effective drafting. This meant that driver skill, rather than subtle car advantages, determined the outcome of a race. The series was deliberately designed to be a 'driver against driver' show, prioritizing entertainment and competition over technological supremacy.

Goal: Understand the core philosophy of IROC and the methods used to ensure competitive balance.

Tools and materials

  • Dial calipers

What they say

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they would go on how did you guys make sure they were all the same what was that like actually in the shop trying to sort that out well the common sense was a lot of it you know we didn't have the tools to have today like lasers and the way they measure things and all that you know we use templates and and measurements and and you know scales all of those things you know we would we would build a prototype car and then at that time you got to remember in the early 80s who just did not have we didn't have coordinate measure machines and laser scanners and you know we rapid prototyping or cnc's or any of that stuff to build them with so built them by hand and we did it the old-fashioned way you know using common sense and tape measures and dial calipers and you know making everything as the as best as we could and I feel like for the for the tools we had versus what I know now about aerodynamics and and you know chassis dinos and all those things we did a pretty darn good job very close with those Hardware that always fascinated me like if you okay maybe this engine makes five more horsepower and this chassis has been fixed a couple times was there any kind of like moving things around or was it like oh this is a brand new card does it not get the Oh no you're 100 right but what we had you know no two carburetors were the same no two sets of tires are the same right so we would move things around and make it an average yeah and that would you know would make the racing better and there were times at Super Speedways or places like that you know we'd raise or lower the spoiler I had you know add a little drag take a little drag away and you know that would give a car a certain advantage in a certain place but not everywhere and you know in the end it was about the race you know Iraq was a show it was a TV show so the whole deal about making up for passing was you know the cars and the drivers would be would be different to create passing opportunities so in the end we could get the cars to run the same lap speed within a tenth of a second at a lot of places we went to but how we did that sometimes was just was mixing and matching the best parts and pieces it's interesting to me would you like take the cars all out individually prior to that you know it was three we'd get to a show three days four days ahead of time and Dave Marcus and George Fulmer you know part of my job was I would Shake all the cars down to make sure they were good mechanically and and that…

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