Many of those dual-roller chains will gain slack as the roller axles wear in. The double rollers give up a bit of accuracy to gain adjustability and strength for pulling big cams against stiff springs.
I always degree a cam when I install it. I start dot-to-dot, and install it with the cam gear dot at the 6 oclock position and crank gear dot at 12" to make it easier to eyeball the dots really are lined up.
__________________
I could explain all this to the girl at the parts store, but she'd probably call the asylum.
White '67 LeMans 407/TH350/Ford 3.89... RIP
Red '67 LeMans. 407/TH400/Ford 3.25
|