ORIGINAL: Silversurfer
It seems that some time back in the days of the easy to use, don't need to drill the prop, the bolt is pre-drilled for the spinner bolt days someone managed to break or strip out the bolt on a 3.2. Shop testing that was done to simulate that failure indicated that the individual had to apply in the area of 50 foot pounds of torque for that to have happened. That takes someone with a pretty good arm or a very long wrench to hit that level of torque.
In any case, being a company that immediately reacts to a situation that could even remotely imply that there may have been a deficiency, Taurus initiated the 6 bolt hub and eliminated the center bolt to prevent that situation from ocurring again. I would have preferred a single bolt hub myself, but what can ya do?
There was a discussion very similar to this a while back on the G62's.....Since I run one and nobody had any torque figures, I decided to do it myself. I'm using 20 foot pounds of torque on the 10 mm bolt on the G62 with just 1 drop of oil every now and then....Works great and no more GUESS WORK on whether or not the bolt is tight.......
BTW, what a great looking 52 Silversurfer!! If I ever get another 50 size engine, I will definitely give one a try...