Quote:
Originally Posted by winders
It's only worth doing if you are modifying the engine in a way that requires twin plugs. Are you rebuilding the engine and increasing the compression?
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An engine can operate with more ignition advance with the new higher compression than without twin plugs, resulting in a reduced probability of detonation.
Without twin plugs, the additional power gain from the additional compression ratio would be offset by a required lower advance curve to prevent detonation.
Additionally, a stock compression engine will be able to have a more advanced timing curve without the probability of detonation by having twin plugs.