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Originally Posted by AC-460
My primary concern is not so much with the bar design itself but rather how it might might utilise the door jamb to stop the whole bar entering the cabin. What's the point of a strong bar atteched to fibreglass.
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Most cobra doors use Ford rear door catches or similar not even designed for side impact in front doors....These catches are only held on with three 1/4 inch bolts. All the side intrusion load comes down to the size of these bolts. Its alright to have big heavy bars in your doors but these bars in the doors will spear straight into you after the three quarter inch bolts have shorn off... In a car the doors carry on past the pillar and in side impact the door carries the load all the way up on the pillar all the load is not exerted on the catch.... unlike a cobra were it is...
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Mine uses 2 3/8 bolts. The shear force required to break these is way more than the traction of the tyres can hold.