Damper can not control anything but vibration, wrong damper will transfer metal, come off, hurt bearings, etc. but not control RPM or else you would not have any problems.
Kirby's bump ports with 1.94- 1.60 valves seem to flow about 250 cfm, other than Hedrick and other NHRA racers that worked on them a lot, that's about what they flow.
A carb works well because it will only flow the amount of air the engine will suck in, but on a large carb it is usually not jetted right for the air flow it will see on a smaller engine, so if you jet it correctly, especially on a trans break at high RPM it will work good. How it drives will suffer but we a talking race only.
