Running compression should MOST-Likely be about:
A) 5% of cranking compression
B) 50% of cranking compression
C) 60% of cranking compression
D) 80% of cranking compression

Question

Quizplus · Accepted Answer

Running compression is typically about 80% of cranking compression, as it reflects the engine's performance under operating conditions, which is slightly lower than when cranking due to factors like valve timing and engine speed.

Running Compression Should MOST-Likely Be About