Twin Cam Engine Build Part 2
As you may recall from Part 1 of this tech how-to, we pulled the Twin Cam “A” motor from its 1999 FXDX home after it hit 100,000 miles. We broke it down, inspected the parts, and then sent the lower end to Darkhorse Crankworks (DHC) so its squad of bottom-end experts could rework the tired components. Working with Dave Mackie Engineering (DME), we concocted a solid 107ci top end using bored H-D cylinders and some DME Mega-Sphere pistons, complemented by a DME cam. Both DME and DHC are known for their superior quality and attention to detail, so it was a pleasure to assemble this motor knowing the end result would be a powerful yet balanced blueprinted motor.