Thanks for the link.
The credibility is climibing. The article seems to confirm what I said in my previous post.
The frame locks use the bumper beam in a manner it wasn't designed to. That's not necessarily bad, it's only adding to the structural rigidity, not replacing it; so I'm not concerned safety wise.
However, since the bumper beam was never intended for chassis stiffening, I'm wondering if it just happens to be strong enough. Due to it's shape, and the axis of the stress, it would seem that it should be ok. I'd like to seem some hard core autocrossers let us know what happens with frame locks after some long sessions of flogging. Performance wise, I'm sure it helps. But I'd like someone to examine their frame after the autox flogging sessions.
The other thing (that was mentioned by someone else) is that in a front or rear collision, frame locks alter the behavior of the bumper beam. The bumper beam is meant to take the first impact. By locking it to the frame the bumper no longer contributes to dampening the collision. Instead, all collision forces are immediately transmitted to the chassis. Again, this is probably a marginal effect on crush safety, but it does mean that any little 15 mph fender bender you get into will probably cause some frame damage. That's probably worth it on a dedicated autox or racer... but not for a daily driver (unless you like risking body damage when some idiot yapping on a cell phone decides to bump you.)
In the end, it sounds like Korbach has a legit product. But you gotta know what the trade offs are (just like low clearance exast systems, lowered suspension, engine mod reliability, changing your airbag steering wheel to a Momo, etc)
Any autocross experience?
Comments?