| on the camshaft lobe of such small diameter can produce the amount of torque it required for me to make this VTC here on the bench over-rotate. I just tested to see what kind of torque it requires on the camshaft to rotate it to lobe peak and it takes 18ft/lbs as indicated with my torque wrench on the VTC retaining bolt with the JWT high tension springs and JWT 500 series camshafts. I also rotated the camshaft/VTC sprocket to the position of e maximum torque in the closing event produced by the cam/valvesprings (18-ft/lbs) using the torque wrench and then locked the VTC by the outer sprocket. The cam helix did not rotate at all from its stop. While still locked in this position, I tapped the front VTC retiaining bolt to see if the piston helix would slip, and it doesn't. I dont know if you have performned these tests yourself or not, but what I am seeing here is clear evidence that the VTC is not overrotating at all - there simply isn't enough torque from the camshaft/valvesprings nor is there any shock in the system that could break that anti-lash of the helix loose - even if there were, there still isn't sufficient torque from the cam to overpower the piston helix return spring and cause the piston to move up off its stop.... I dunno Brett, but what I'm seeing here is telling me that my running test I described to you in email earlier today is going to yield the same results - the camshaft/valvesprings simply isn't overpowering the VTC mechanism and causing the cam to overrotate.
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