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Fuel grade for base ignition map

Road Tuning

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For the base ignition map, what fuel grade is recommended. Here in the US what we can get at the pump varies from 91-93 octane. Would the base ignition map sample be safe with 93 octane?

I'm sure it would. It does depend on the compression ratio of the engine. If you had a 15:1 you could probably start with even less timing.

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