C CNC BLOCKS N/E · Registered Joined Nov 30, 2003 · 2,796 Posts Mar 7, 2018 Report Reduced base circle cams cause to much lifter pressure angle, Big bore short strokes make the heads work better. If someone wants to run the Callies XD rods I don't have a problem with a 4.0 stroke.
Reduced base circle cams cause to much lifter pressure angle, Big bore short strokes make the heads work better. If someone wants to run the Callies XD rods I don't have a problem with a 4.0 stroke.