Erland Cox wrote:OK, thank you.
I would never had believed that a dual plane could be so close to a single plane manifold in such an high hp application.
We have made almost 700 hp on a big block with the stock aluminium dual plane.
But only on the forst pull.
Power drops up to 50 hp because of heat soking at the second pull and then stays the same.
Despite a valley tray to keep hot oil off the bottom of the manifold
As Joe says in his posts you need to run a big carburetor on a dual plane to make it run well because the cylinders only see 1/2 of the carburetor. I have a Dominator adapter that I modified with a divider down the middle that I want to test on a dual plane some time. I think it could be interesting on a large engine at moderate RPM.