If it won't work right on the bench with dummy rounds, adding 45,000 psi of
firing pressure to the equation is not going to make things work better.
"The
firing pressure in the combustion chamber causes the rings to load from the back side pushing out against the cylinder wall.
"The
firing pressure in the combustion chamber causes the rings to load from the back side, pushing out against the cylinder wall.
Increased
firing pressure might have been one of the factors contributing to the accounting shenanigans of the late 1990s.
Other significant improvements included lowering of the turbo speed by 400 rpm (resulting in longer turbo life cycles) and a drop in peak cylinder
firing pressure by as much as 90 psi (for longer power pack life).
"It used to be that the peak
firing pressure on a diesel was 150 bar, and it's now 175 bar," he says.