P8R head piston to valve clearance?

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12-21-2010, 08:47 PM

Spawne32

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P8R head piston to valve clearance?

Has anyone run a P8R head with the 33mm valves on a factory B20Z with factory PHK pistons? Does anyone know the piston to valve clearance? Do the pistons NEED to be fly cut for 33mm valves or is there enough clearance that the valve never even meets the relief? Trying to get a rough idea how much machine work i have cut out for me here.