DW,
First I want to thank you for your participation on these boards, your responses have helped many of us who are building better understand the intent, the allowance, and the letter of the rules.
On the side helmet restraint, I understand the intent of the new rule and am trying to pick a seat for my CC (2011 is looking unlikely, I'll try for Elmo in early 2012. I live 90 miles from BRD, so private testing is easy.)
I spent a fair amount of the last few weeks researching multiple seat manufacturer's products and watching Speed channel for multiple racing series' use of lateral head restraints. This safety feature seems to be common in many racing series (gotta love those in-car cameras). The common forward limit of these restraints is closer to the side of the driver's jaw and no side helmet restraint currently manufactured or in use in other racing series (other than a separate insert as in IRL) goes forward to the front of the helmet. Most of the restraints in use (and available for purchase) only go as far forward as typical torso bolsters; i.e. as far forward as the back edges of the helmet face shield. This seems to allow reasonable entry and exit on fixed-door cars and restrains the helmet from lateral movement in a violent rollover. Their appears to be no tendency of this level of restraint to allow the helmet/head to go forward of the restraint and lose lateral support.
Is the intent and enforcement of the 2011 helmet side restraint rule to be compatible with these other racing series and readily available seat hardware, or are we going to have to extend the available restraints to the "forward most portion of the helmet"?
This would be a 5 to 6" difference and could be the difference between safe egress and no egress at all. If the latter, this standard exceeds all other amateur racing series in the US and will require custom hardware for each car as this level of side restraint is not readily available on the open market. I will then mount my seat farther aft and my steering wheel on an extension with the disconnect at the base so that I have sufficient room between the forward limit of the helmet restraint and the A pillar to exit in a hurry. It is this conflict between the A pillar, the steering column, the helmet restraint, and our aged girths that we are concerned about.
Again I thank you for your patience with my pedantic questions.