Dual pattern cams...Black Magic or Legit?

[Buddy Rawls]

I assume you are referring to camshafts with the lobes set up for specific cylinders. To make it work properly, not just to be a latest trick of the week, the complete flow paths of each cylinder would have to be flowed. This would require intake side to have intake manifold attached and the exhaust to have a full length header tube. Then you could see the cylinder to cylinder differences and what changes specific cylinders would require. Then a camshaft ground to those needs would need to be a full custom machined camshaft, all lobes and positiongin, Not just a specific intake and exh lobe and LSA. But rather this intake lobe and this exhaust lobe on very specific centerlines for cylinder 1, then so on and so on. this means that cylinder 1 might have a 110.5 LSA, and cylinder 2 might have a 110.25, etc and the lobes lightly different too.

You run a far better scenario of proper valve events by flowing all cylinders (full paths), then averaging all the intake flows and all the exhaust flows, then coming up with a conventional camshaft with an intake lobe and exh lobe, used throughout on each cylinder, set up on a specific Lobe Sep Angle (to match the openings and closings that were calculated to give the lobes that match).

If this is not what you are talking about, then explain, and I will address it from your questioning.

I think you are truncating the above thoughts to use end cylinders as same intake and exh lobes and LSA, and the center cylinders as a different set of lobes and possibly slightly different LSA. But in my first scenario of quantifying every cylinder, you an see that unless all center cylinders flow identically and end cylinders flow identical, its not near perfection.

In closing if you cannot run the motor a group of single cylinders, whats the point??? grouping center cylinders that do not flow identically and end cylinders that dont flow identically is not accomplishing anything. sure it may help. but the better solution is to average the cylinders, first get the flows as equal as possible, and go from there.