You are wondering if the 2nd set of triangulated bars going to the firewall center area are necessary ? In either case you would still cross brace the shock mounts and bring in the "down bars" from the cage to the top of the shock towers ? I assume if you did bring the triangulated bars to the center area of the firewall that they are penetrating the firewall and joining to a dash bar ?
Just arm chairing it I would say those could be overkill at least if you are thinking more 1.75" DOM, it depends a little on how much top view angle you are getting from the cage to the shock towers. I guess I would be inclined to bring in the outside cage bars and cross engine brace, and then maybe go with something a little lighter and removeable if you still wanted to brace to the center of the firewall. You could build cage reinforcement on the cockpit side of the firewall, and provide a bolt in interface, and then use lighter weight removeable tubing that bolts on to the shock towers and the firewall reinforcement plate that I just mentioned.
|