Application: Fits all Porsche® 944, 951, 944S2 models and 1980-1986 16v 928
Advancing or retarding the camshafts in relation to the crankshaft is another performance tool you have to move your power and torque exactly where you want it.
Advancing a camshaft opens the intake earlier and closes the exhaust earlier. This will shift the power curve down, and produce more low range torque at the loss of a little top-end power.
Retarding the camshafts shifts the power band up, increasing mid-range and top-end torque, at the loss of the bottom-end.
Its easy to do on the 16v 928 and 8v 944 engines – removing the timing belt, then camshaft sprocket, replace the key and re-assemble.