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Engine blocks have a register or dowl to locate the main cap. Everytime you remove and reinstall the cap it sits in the same location. Connecting rods without dowls use the bolt shank to locate the cap. If bolts are replaced the rods needs resized.

Yeah nothing wrong with that

The velocity through the curtain area has a major effect on power potential and is also one of the factors used to determine the cam requirements

No arguments here just wanted to crunch some numbers. All good

Can you share some head information? I'd like to see the flow numbers at .400", .500", .600" along with the intake valve diameter, throat dia or % and the port length and CC's if possible

Which heads are you using?

You are correct about the engine builder, they should have the information to select the proper head for the intended application but the correctly designed cam will, for a lack of a better word, fine tune the velocity. Yes i'm the same, unfortunately my math skills only go so far.

No i wouldn't and the reason is the air velocity would be to low for the 408 and too high for the 632. I liken it to sucking on a straw where my mouth is the piston, the straw is the port and my finger covering the end of the straw is the valve. How far i move my finger from the straw, how fast...

I would like to see the math but i also have a copy of that book.

Understood but..the air velocity is number one and the cams job is to control the velocity of the air through the port. The ability of a specific engine combination to use what the port is capable of is probably why some engines make more power than others with the same head. Using the port...

Interesting cam math but how does it determine cam specs with out any info on the cylinder heads?

For any product?

What's the intake valve diameter?

What are the Jones Cam specs?

You'll find the best quality products and best performance from Jones Cams

Yes and that port would not have a push rod pinch but as mentioned we have to work with in our constraints

If you're designing a port/cylinder head the intake valve diameter is sized to provide the desired average port velocity for the application

Multiply your valve diameter by .25 and measure the cfm at that lift number

I'm definitely no expert here but i believe you're trying to compare apples to oranges. From your first post.."That's how velocities in certain areas of the port can exceed 350.3 average." "Certain areas" of the port are local velocities not average. Using your pitot probe at the curtain area...