Quote:
Originally Posted by birdracing
You must be thinking old school. Or someone else. 13:1 is the compression# What in the world makes you think you have to run high octane all the time? I have had the same tune by Greg at Antivenom since i put the combo together. If done right you don't have to worry about spark knock or detonation. I run 109 unleaded when i go to track or if i'm having a little fun one evening . Other than that it Shell 93 for the win...
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That's the beauty of LS1's, 13:1 comp is no sweat for pump 93 oct with a proper tune

been there done that many times