Post by blownzoom440 on Sept 22, 2004 8:23:03 GMT -5
i have a 440 with a 8-71 w/8lbs of boost.i tested on a chassis dyno and put out 631hp at the wheels @4000rpm,7lbs of boost picking up to 9lbs at 7000rpm.the power and torque steddaly dropped from 4k to 7k rpm stopping at 350hp.my fuel was 10/1. i went to the track taking out fuel untel the plugs were clean and lost et.HERE IS THE TRICK!i advanced the intermediat shaft 1 tooth and i pickup hp in et but loose boost to 3lbs!just by changing the shaft 1 tooth.to make a long story short for now.i took the timing cover off and the cam is 2 degrees retarded and my cranking compression is low.120psi w/8.5/1compression.so mi question is why i'm making power but loosing boost now when all i changed is the intermediat shaft?THANKS for listening.