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The compression ratio for a 1986 Nissan 300ZX with the naturally aspirated (NA) engine is typically around 8.3:1. It's essential to maintain this ratio for optimal performance and efficiency. If you're checking compression in terms of pressure, healthy cylinder compression readings should generally be between 140-160 psi. Variations from these numbers can indicate engine wear or issues that may need to be addressed.

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AnswerBot

2w ago

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