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Showing results for tags 'ignition retard'.
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Ive now set up my own ignition retarding feature for when the auto transmission shifts under heavy load. I run about 13psi under full load, and I wondered what stresses are on the exhaust valve when the cylinders are being fired at 0 degrees advance. AFRs under full load are around 11.5 : 1. Should that keep the combustion temperature in a safe range for the valves? Or should I richen further while retarding the ignition? The retarding period lasts about 200ms, or about 10-12 combustion events per cylinder at most.
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- ignition retard
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