09-14-2009, 04:44 PM
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#7 (permalink)
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Enthusiast Member
Join Date: Feb 2009
Location: Double Oak Tx
Posts: 255
Drives: 370Z, 96CE hotrod
Rep Power: 17
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Quote:
Originally Posted by noodles
Why couldn't they come out with some set of 12:1 or higher for those that want to stay NA?
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First, no one really knows how high of compression you can go with a 370Z using 91-93 Octane gas.
Typically the next step is a thinner head gasket for a tighter quench and higher compression. Then it's milling the head for desired cc's to increase compression. You may have to cut deeper valve reliefs depending upon how these motors are set up but that is easier than you might imagine. (Honestly don't know that part)
More than likely you really don't need a high compression piston unless your building a true race motor using racing level octane and or just really want a forged piston instead.
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