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Dynamic compression ratio is important to engine durability by ensuring its compatibility with a specific cam and octane. A higher ratio means the engine derives optimal mechanical energy from an air-fuel mixture.

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What is this difference between static and dynamic compression in 5th grader terms?

Static or cranking compression pressure is what each cylinderexperiences when the starter motor is turning the engine or whenthe engine is running at idle RPM. Dynamic compression is measure with all plugs installed but one. The compression is measured at that one plug hole when the throttle is snapped open for a split second.


Mazda rx8 there is abnormal noise from engine while starting the engine the noise is like rubbing noise we already check all drive belt and all engine and exhaust bracket and engine and ger support.?

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The compression can be different from one engine to the next depending on mileage and maintenance. What is important is that all cylinders are within 10/15 lbs of each other.


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What is the compression psi on a 1990 engine?

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