Hello, can someone explain cc on 427 tunnle port heads, more cc is better or less is better advangte or diadvantage. Thanks

It would really have to depend on the rest of your engine combination as to whether it would be a good scenario or a bad scenario. Of course chamber size affects your compression ratio, along with piston shapes, deck heights, head gaskets, etc.

Port volume also affects the engine combination extensively. If you have a small displacement engine with a small cam, dual plane intake, etc., then a large volume is going to adversely affect the performance. That large volume of air has a momentum and velocity...it's harder to get a large amount of air moving in a short amount of time. A tunnel port head on a small displacement engine, IMO, would be better suited for higher rpm operation.

For a given combination, I try to maximize flow while keeping port volume lower.

combustion chamber 76 or 88 cc dove or ford tunnle port heads.

...if you want to post the specs of your short block, we can help you pick a cylinder head.

specs. will be 427 shelby or Gen. cast iron block stroked to 492 with dove tunnle port aluminum heads, intake, 1050 holly, 12.1 comp. comp. comp. cam around 700 lift 270 duration 1.76 roller rocker, application will be endurance road racing up 7500 RPM. in less then 3000 pound "wet" mustang fastback with 315.30 18 front, 345 30 18 rear wheels and tires.

For instance, Diamond has several pistons for a 4.25" bore and a 4.25" stroke which would give you your 482ci. You could go with a 6cc valve relief piston, along with a 76cc chamber. If you put the pistons at zero deck height, you would end up with an 11.8:1 compression ratio. If you milled the heads and took 2cc from them, you would get your 12:1 SCR. Putting the piston at zero deck will give you excellent quench.

There are several options there, but for anything but a pop-up dome piston, I would imagine you'd want the 76cc cylinder head. I would rather have a flat top as many think the flame travel across the piston is much better.

I think you can even get your Tunnel Ports from Dove with 58cc chamber option and finish machine it to a chamber like a Blue Thunder head kidney shape chamber .... much better chamber design