Quote:
Originally Posted by Scarebird
Wouldn't a 428 with flat pistons and 6X's do better on quench, flow and compression?
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Yes, but the 670's were to make the car look more correct.
The 428 is my favorite for street driving: more torque than a 400, but not so much that street tires have no chance off the line. And it still likes to rev.
I'd make a template of the 670 combustion chamber outline and digitize that to mill a dish exactly that shape into the pistons which will maximize quench, which in turn reduces octane dependency.