[Richard in Florida]

Originally Posted by 40 Deluxe

Okay, so what kind of advance curve works best; use light springs to have a quick advance rate, all in by say, 2,000 RPM? Or, use stronger springs for a delayed, slow or late advance, all in by say, 4,000 RPM?

All in by 1800 to 2000 rpm. This has produced the best response and power in our tests.

Incidentally, when you incorporate a vacuum advance canister, take the vacuum directly from the manifold, not from the carburetor.