Having been to Sterling's place, seen his workshop, tweaked on my car with him and driven a Sterling for a few seaons, I would accept no substitute.

Carl's ported manifolds are also very kickass, especially when mated to a Sterling.

And with Carl flowbenching everything that will sit still long enough to be tested, it just makes sense that I'd put my money where the proof is.

Yaw doesn't do carbs or 12a stuff anymore, but he makes a good point about the flowbench in his article on Flow Testing:

http://www.yawpower.com/Flow%20Testing.html

Once I build my Ultimate 12a, I'm going to get some dyno numbers of what a Sterling can really do on an Ito-ported 12a Should be an interesting dyno graph.

Jon