cylinder preshure and cam relation

As they said. Simple poor execution on the factory's part to get the chambers where they were supposed to be and the pistons where they were supposed to be. This is why we always ask what the real compression is when someone posts "it's got 10.5:1 pistons..." Also if it's a purple shaft... was the cam degreed? Because if it wasn't, and it's as bad as the last one I used, it would cause low cylinder pressure when installed by lining up the dots.