[Stan Weiss]

Originally Posted by PAUL K

These are great heads for a serious effort high performance Pontiac. They are copies of what we consider our "standard pushrod location race head". They differ from other commercially available CNC heads in many ways. But what we are most proud of (other than their power producing potential) is the lack of pushrod tubes and head bolt sleeves. For years I've rolled my eyes looking at ported heads that slice away the head bolt boss. The loss of integrity of the casting and potential for sucking oil far out weighs any power gain found from removing the head bolt boss. The pushrod tubes are almost always in the way of the pushrod or a shop installs a tube that is excessively large and reduces the CSA area at a critical point. These heads have made over 800 horsepower on stock block builds and have run 5.0 in the 1/8 on a 3300 lbs. street driven nitrous car.

The port volume is close to 250 cc.

Port window has been optimized to work with a Victor manifold.

That's a modified cast 72 CC chamber in the picture. We have done these heads with the Edelbrock CNC chamber and 87 CC ports. Valve size can be varied per application.

Delivery times are a mess due to parts availability, folks not wanting to work and the people that are willing to work being over loaded.

Paul,
What bore size was used for the numbers Brian posted?

Stan