b18beans Posted August 26, 2009 Share Posted August 26, 2009 wots the actual crack wit compression?it right turboed cars generally have lower comp ratios than powerful n/a enines? take it this is because n/a engines need to be highly strung (revvin fast) to make good power numbers?what would you need to upgrade to make the most of high comp pistons/engine? everything?!and what is a reasonable, driveable, comp ratio to run? again, am guessin 13.2:1 is pretty high, racin car territory?and whats it measured in?noob Link to comment Share on other sites More sharing options...
Moe Posted August 26, 2009 Share Posted August 26, 2009 usually uprated camshafts need higher compression engines to make the most out of them. high compression means the air/fuel mixture is squeezed even more which results in a bigger bang.turbo cars need lower compression due to forced induction. it is possible to run high compression with a turbo but you would need some seriously high octane fuel to stop it from preigniting.if a car has a compression ratio of 13.2:1 then it will compress 13.2 parts of air into 1 part. B18C4 engines in the mb6/2 run 10:1 compression. one way to bump the compression up without changing the pistons is to either get a thinner headgasket or high compression valves or both Link to comment Share on other sites More sharing options...
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