Cams choice, Low CR vs VE%

318willrun said

because flow trumps compression. Ideally, flow with compression is optimal. But when bumping compression isn't in the budget, they chose flow over compression. Yes, they will bleed off a little compression to gain flow. And guess what? It works just about every time it's applied.

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Let me see if I’m following here.

If I’m building a 318 and I need heads do I chose a 318 head and keep the CR up or a 360 casting and get the flow?

Every single time I pick the 360 head. All engines are a series of compromises. The engine with the least amount of compromises is always better.

That’s why I pull my hair out when I see guys building 400 plus inches and use a stock casting or even an Edelbrock head. That is so induction limited that to get any reasonable RPM out of it you have a cam that is the dread bottom end killer.

But that torque number is up there.

That’s if I’m following your thinking.