Technician A says that engine performance is enhanced at upper rpm when cam timing is advanced. Technician B says that more valve overlap enhances lower engine rpm. Who is correct?
A) A only
B) B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Advancing cam timing typically enhances lower rpm performance, not upper. More valve overlap generally enhances upper rpm performance, not lower.

Technician a Says That Engine Performance Is Enhanced at Upper