Quote:
Originally Posted by slowmover
Super tight quench, huh?
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I've seen the broken hypereutectic pistons from a balanced and blueprinted LSx that went together with 0.021" quench, there's good reason for the 0.035" minimum rule of thumb. The difference in engine output or efficiency is too small to measure, but having to replace pistons every week is senseless.
Tight quench can help emissions, but only if used right. There are also modern examples of "excessive" quench clearance reducing emissions without measurable compromising power output. Cranking compression over 200 psi, in fact.
So better to have .045 than .030