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Discussion Starter #21
Excellent pics Armitage!
 

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Don't be tempted to fit harnesses and leave the original inertia reel belt in place. Its dangerous as the mounting bolts on the seat could shear under impact as the outboard loading on the bolt is greater than tested.

Below is a posting from Nick Adams of Lotus ...

The seat belt mounts on the Elise meet the legal requirements for strength and as such are judged to be satisfactory. We supply kits to fit four point harnesses to all of our Elise based cars and these have also been tested and approved for use on the road by the relevant authorities. We cannot recommend using any other harness or mounting arrangement as we have not tested it and cannot state that it will meet the legal requirements or that it will offer adequate protection in the event of an accident. We specifically DO NOT recommend retaining the three point harness when fitting a four point system as we have seen examples of belt mounting failures on non-Lotus approved installations where the additional torque applied to the mount in impact as a result of the greater mount offset resulted in a direct stress failure. To achieve a safe installation all but the tallest drivers will need to fit seats with harness slots to get an acceptable belt run over the shoulders, in most cases the wider "wings" on these seats then prevent a three point harness sitting correctly across the torso. A badly fitting seat belt is potentially lethal, so don't take chances.
 
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