Tunnel ram or no tunnel ram...

Cheapsunglasses said
It’s my understanding, and I’m by no means anything close to an expert. When you are running multiple carbs, they aren’t individual carbs, they have to act as 1 carb. And there’s also a reduction in cfm, it’s not a full 1500cfm (there’s some science I don’t understand there.) That’s why the idle circuit has to be reduced by half, and I believe there’s other circuitry that has to be reduced too.

What I think this is about is, if you put two 1500 cfm carbs, they won’t work to there full capacity as if there was only one. This is a reduction in how much is pulled through the carb. Not the capacity of the carb being reduced or the efficiency. The engine likes the extra available air and fuel flow of the twin carbs over just the single carb. The twin carbs make the engine more power with what’s available in overall A&F flow and lack of restriction.

I have no idea about the “Half the idle circuit” needs to be done thing.