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Chevron B21 vrs B19 Having scooped the Chevron B21 in the post race auction of the IROC Race of Champions, the challenge raised was to describe the differences between a B21 and B19. The B19 car had closed cockpit over the passenger seat and roll hoops where not full width. The B21 had to be open cockpit over the passenger seat, full cockpit width and full windscreen due to new rules which stated in 1972 the cars had to be 2 seaters. In 72, a change in tire type occurred. Slicks came along and some cars ran the treaded tire and some tried slicks which had a different side wall height. As such, this could result in a modification for B21s rear wishbone lengths / camber castor ride height. The differences between B19 and B21 chassis is that the B19 has a narrower central member between the "seats" about 3" wide. The B21 was made wider (due to new rules) about 5". The side pods on the B21 are narrower than the B19 to accomodate the wider centre section without increasing the overall width. Happy New Year. :yahoo: Dave
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