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I am about to order my pistons from Carillo and want to know what experience you guys have had with higher compression ratios. Specifically, how much can you run without knock. The lambo has a true hemi chamber which lends itself to higher ratios . I think the chamber is about 43 cc including reliefs but someone please verify. I had measured and now cant find the paper I wrote it on. If you are running dome tops, what ccs are the domes? What is your ratio. What is the stock head gasket thickness? My cometics are .050 which may be thicker than stock. I am thinking that I will run about 10.6 to one but would really like input. I do not want to have to run octane booster. I am planning longer duration cams which should fare well with higher compression as well. Thanks for the help. Lee
 
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