Originally Posted by
Racer Chris
In the past, the simple X door bar design was not allowed in any SCCA road race car.
Chris, I don't necessarily disagree with your technical points, but you are mistaken on the history of the rules. Prior to the 2007 change there was not even a requirement for a right-side tube. This is from the 2005 GCR spec for Showroom Stock:A side tube connecting the front and rear hoops across the driver’s door opening is mandatory and across the passenger’s door opening is allowed (recommended).
It wasn't until the 2007 GCR that passenger side bars were mandated:Effective 1/1/07 and permissible 10/1/05 two (2) side tubes connecting the front and rear hoops across both door openings are mandatory.
Finally, it wasn't until the 2008 GCR (per a 2007 Fastrack) that x-bars were approved as "two side tubes", precisely for the reason you describe (others had already gone beyond the prior rules requirements and built an x-bar where none was required, and didn't want it to be made illegal) :NASCAR-style side protection or one bar bisecting another to form an “X” is permitted.
Greg
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