Quote:
Originally Posted by JesseK
PINK had a hard time convincing inspectors their bumpers were legit in 2014. It was easily one of the best and most robust bumper setups I've ever seen: 1x1" thin wall welded as a rectangle around the inside of their bumpers. The outer edge of the 1x1 tubing defined their frame perimeter, and attached to sturdy 2x1 mounts in their WCD setup. It was very robust, and very easy to change bumpers. Yet the tubing was, more or less, permanently mounted to the bumpers.
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Just to clarify, the problem with PINK's setup was not that they used substantial structural members on their bumpers, but that their frame perimeter was determined by structure permanently attached to the bumpers rather than the frame. If you do frames the way 33 does, and have flanges that define the frame perimeter (meet flush against the plywood more or less) but structure that sticks out from the bumpers but goes within the frame perimeter, you're completely legal.
This year is a tough year for structural bumpers though, since they sit mostly above the driveline.