Technician A says proper tuning of the exhaust manifold tubes can create a partial vacuum that helps draw exhaust gases out of the cylinder, improving volumetric efficiency. Technician B says combined headers allow the cylinders next to each other in the firing order to be combined. This increases exhaust efficiency. Who is correct?

Question

Quizplus · Accepted Answer

Proper tuning of the exhaust manifold tubes can indeed create a scavenging effect, helping to draw exhaust gases out of the cylinder and improving volumetric efficiency. Technician B's statement is incorrect because combining cylinders next to each other in the firing order can actually lead to interference and reduced exhaust efficiency.

Technician a Says Proper Tuning of the Exhaust Manifold Tubes