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Message: <blockquote data-quote="cuscostrutbrace" data-source="post: 1064123915" data-attributes="member: 3867">Compression ratio (static) and results from compression test is not the same.You cant compare 10.5 compression ratio to 10 bar compression you get from compression test.The stock compression pressure for blacktop is 13.8bar,some also call this dynamic compression (compression pressure that is,not ratio).If yours is 10 bar then there is something wrong.But the compression pressure is affected by a few thing,mainly cranking speed,cylinder sealing and cam duration and timing.To get good results,the cylinder must be as air tight as possible when the piston move up in compression stroke.Now,when you fit a long duration cam,coupled with low cranking speed,some air will escape compared to the stock cam,because the cam opens the valve longer,so it is expected to go slightly lower if youre still using stock piston.But with hi comp piston,for it to go that low (13.8 down to 10) is weird.Long duration cams will work when the engine is running,when there is enough air speed coming in and out of the cylinders.It could be a lot of factors.I suggest you carefully check your cam timing,make sure it is DEGREED CORRECTLY,check your cam spec that the manufacturer suggested to have the cam fitted at how many degrees lobe center.When you use thin head gasket and also skimmed head,your cam timing will be wrong by a few degrees compared to stock,so please check.Check your valve clearance too,make sure its within the specified range.I think your compression ratio would be good enough,its just that your compression pressure result is worrying.About the Adaptronic,its a good ecu i dont think there is something wrong with it.</blockquote>

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