We're all about geeking out on Howstuffworks.com. Already having spent hours staring at a cross-section of Chrysler's Hemi and the Wankel Rotary engine, we've moved on to considering every inch of Sunday afternoon's Nascar rides. Those racing sleds are so hightly modified these days, we're pretty sure the term "stock car" is really just a suggestion.

How NASCAR Race Cars Work [Howstuffworks]

Related:
Wankel Event Showcases Mazda Rotarians [internal]

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