Split: crank sensors in high revving 16Vs (internal and external)

I'd guess the reason for number of bolts is because the flywheel has so little inertia. sounds counter-intuitive but the flywheel inertia damps out the torsional vibration from the combustion and reciprocating mass. Taking weight of the flywheel 'increases' the amplitude of the pulses so need more clamping force from the bolts.

Also the cylinder pressures on that engine will be ridiculous which will add to the pulses.

I'm still surprised it requires 10 though as a V6 should be quite smooth, they'd normally have fewer bolts than an in-line 4.