Tag Archives: Mopar

Adam’s 493

This 493ci Mopar came in for check over.  It had 13:1 compression, broken pistons and rings, and bent valves – quite a mess.  We dropped the compression to 10.8:1 and sorted all the problems, resulting in a 550hp street engine, with 550ft-lbs of torque.  This will make Adam’s ’72 Challenger haul ass!