- Oct 13, 2004
- Reaction score
My best guess is the engine rattled (detonation) due to too much timing for the temp of the non-cooled boost air, the pump gas , and early peak torque rpm. The pressure spike from detonation is extremely destructive. I remember when Dave Brode built his twin small turbo blow through Cad and gave it just a bit too much throttle on the test drive...no more than 10 psi but rattled for a half sec before he let off and both gaskets were gone. I don't consider 28 degrees of timing a safe starting point for a Cad with 10 psi on pump gas.