Thread: Help identifying cylinder heads

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Originally Posted by donmcgowen

Anyway, I'm going to port them.

I have to smile to myself whenever someone says this. If you don't have a PhD in Fluid Dynamics or 30 years experience porting heads for a living, chances are pretty good that they'll flow less when you're through with them. Just like a woman's rear, it's all about the shape, not the size. For instance, the Chevy L31 Vortec heads are only 170 cc's on the intake runners, but they will outflow aftermarket heads with larger 180 and even 190 cc intake runners because of their SHAPE.

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I wasn't implying that "I" was going to port them. But if they are decent heads I will have them ported when I have the engine built. I'm just trying to figure out if these heads are worth building around.

Thanks.