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Compression Ratios

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  • 2 weeks later...

I've seen 15:1 compression on a motor with 28psi of boost .... was a diesel powered Mack truck though, so perhaps not helpful in your situtation.

 

A little more info might get you some more answers. Will depend on the engine and how 'laggy' you can live with. You could run 10:1 compression with 0.2bar boost, or you could run 8:1 with 1.5bar boost.

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