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Old 03-02-2012, 05:33 PM   #42
Outlaw5.0
Focus Enthusiast
 
Join Date: Mar 2011
Fan#: 84300
Location: Canton, MI
What I Drive: 2011 Ford Focus SES

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I have run engine dynamometers for over 10 years, 11.6:1 and boost on 91-93 octane pump gas will not happen. Now on 100 plus octane unleaded race gas, or E-85 is another story. You will reach a limit with cylinder pressure where you will start breaking factory pistons and rods. There is a reason why turbocharged engines from the factory are in the 9:1 to 10:1 compression range. Sorry if you think Tom or myself are wrong, you are more than welcome to try it on your own.
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