Geezzz this went out of whack. LOL Compression is good. OK? Dynamic compression or what ever you want to call it as I don't pay any attention to it unless I'm building something that will be octane limited and want a little backup for what I already feel. I can take a good running engine with say 180 cranking,run it on the track or dyno,recam it,lose 20 pounds cranking and pic up a bunch of power,no big deal,could I make more power with more comp? Yep, but I'd be looking for better fuel. CRANKING,DYNAMIC WTF ever numbers mean very little,but don't go crazy if your octane limited,there are no magic gains by pushing those magic numbers. Cam timing as well as other factors contribute to HP output to a larger degree than what happens at 400rpm on the starter. NO I'm not saying that good cranking numbers don't help drivability and mileage for a good running street car but do not think that that numbers tells the entire story if performance is your goal. Sorry if I made things difficult to understand.