Quote:

---

I spent a bunch of money dyno testing camshafts on my 470 low deck motor. It had exhaust manifolds and lots of people told me that I would need extra duration on the exhaust side to compensate for the manifolds. Turns out that the very best camshaft for that engine was the old school Mopar .528 solid flat tappet.

I suppose if I was given unlimted funds I could find a camshaft that was even better than the .528. And perhaps, after hunreds of dyno pulls the very best cam might well be a split pattern cam. But I called it quits after spending a couple of grand on cams and dyno time.

As far as I know, nobody knows the answer to this question. It is fairly easy to get a 90% correct answer to the question, but I don't think anyone has ever really figured it all out. If they had, then there wouldn't be any need for all of the dyno testing that goes on every day at all of the engine shops around the world.

---

Right then , take it the jurys out for single pattern grinds.

Used 14 degree split when on the bottle , but that's a different story.