[Sirrotica]

The Carter AFBs had weighted secondary air valves which were selected according to applications. I've never done it myself, but have read if you want to slow the air valve opening rate down you can drill holes in the weights and press led shot into them, similar to using mallory metal to balance an engine.

The one size fits all applications of E carbs is more than likely why there is transition bog on some applications. They seem to do the same thing as holley does, and err on the rich side to cover some of the metering shortcomings.

For as much as a new carb is, and how FITech and other companies have gotten the price down on fuel injection units, they keep getting closer in price.