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specs on lq9 heads


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I think this is right for the 317 casts....

 

Truck LQ9

Material: Aluminum

Part number: 12562317

Combustion Chamber Volume: 71.06cc

Compression Ratio: 10.1:1

Intake Port Volume: 210cc

Exhaust Port Volume: 75cc

Intake Valve Diamter: 2.00-inches

Exhaust Valve Diamter: 1.55-inches

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i think chp or super chevy flowed a buch of chevy heads including stock. i was just wondering because everyone is going with cams that have more exhaust duration but ive read that engines whos heads have an exhaust to intake ratio of more than 70%(closer to 80%) prefer single pattern cams. just wondering

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