I am brainstorming about good way to control amount of air going into my heating system/ventilation system by installing some kind of damper controllable from instrument panel by push - pull cable. It is hydronic heater with two speed blower that is used on some kind of small European car. Front opening is about 3 in.² at the most. Hoping to make it larger and not sure if 2 inch round damper would be big enough for 100 miles an hour 2-seater. Pretty sure I'm not the first one who is doing this. Any ideas would be welcome. Thank you !
