14mm to 12mm stud for 944 alum arms

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I noticed some guys are talking about the the reducing studs for the alum 944 rear arms. As a general rule, a machined (lathe turned) thread can never be as strong as a bolt (rolled) thread. When you roll a thread you compress the surface of the thread leaving a residual compressive stress. This prevents crack propagation. In a turned thread, the base of each thread is a stress riser and prone to failure.

Ofcourse, I'm talking of large loads that can lead to failure. This loading will never be seen of a street car. Also, the shock bolt is loaded in single shear. This is a bad situation for a bolt to be in, so keeping the diameter of the bolt as large as possible would be a good idea.

What I'm suggesting is that you replace the lower bushing in the shock to allow for a M14 bolt rather than a stepped stud. Also, I'm pretty sure I can market a replacement bushing at a much lower price than a turned piece. I'll throw out an guestimate of about $C45 for the set (four half bushings and two sleeves). The bushing material will be UHMW(Ultra High Molecular Weight) polymer, which is much denser than rubber and will not deflect much. The installation would require you to remove the stock bushing in your shock and install the replacement.

Let me know how much interest there is for this product.

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