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#11
09-11-2022, 08:45 AM
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You can’t just look at the exh to intake ratio, the level of cylinder pressure the motor will make and how fast from BDC the piston gets to its fastest acceleration point are all factors.
Low compression motors leave far more unused gasses ( think of heat that can no longer be used to drive the piston ) in the cylinder at the time the exh valve opens and this added amount of unused gas requires more time to get out of the motor. This is one of the main reasons that even though low compression motors make less power then a similar high compression motor, they tend to run hotter.
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