All of the following statements are true EXCEPT:
A) cams with mechanical valve lash adjustment have a clearance ramp at the beginning and end of each lobe.
B) a high performance camshaft will have high engine vacuum at idle.
C) advanced cam timing improves low and mid-range torque.
D) retarded cam timing improves high rpm power.

Question

Quizplus · Accepted Answer

A high performance camshaft typically results in lower engine vacuum at idle due to the increased valve overlap and duration, which can cause less efficient cylinder filling at low RPMs.

All of the Following Statements Are True EXCEPT