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Message: <blockquote data-quote="96blak54" data-source="post: 1404349" data-attributes="member: 14727">The idea behind squish is mixture motion and combustion resistance when compression is through the roof or running as lean as possible....keeping it stable just as the piston is coming to a stop. If one needs to add timing,....mixture and motion is poor. Lets think about it here.....The piston at high rpm is moving faster than the fuel ignites and burns off....this is why advancing the timing is needed....to start the burn process before piston reaches top dead center. If the mixture is poor, rich, or stagnant advance timing will be needed. If mixture is stoich or leaner combustion will be more sparatic (auto ignition...key word...kind of what you want at high rpm).  30Â° advance at 5k rpm is much different than 30Â° advance at 7krpm. The 5k rpm engine is poor efficient. The 7k rpm engine is able to run near stoich throughout with out problems.These guys bragging about running advance timing really only shows the builds efficiency. Yes advancing the timing wrings out the potential but can also be an indicator of efficiency.For exampleA stock 5.4l 2v can only and will not show any improvements with over 16Â° advance at 5k rpm. Stoich or lean. If we fatten up the mixture ...maybe so then. That would be counter productive</blockquote>