Vena Contracta and Tuning for Airflow

Mhm. That would be about one horsepower. Whatever you can gain through that plate by changing that column. And how you change a column. Did you do it with throttle blades? Did you do it with large screws? Anything to disrupt it or to change it. Yeah. Would be a plus. That's why I love carburetors cuz it's like it's part aerodynamics, part you know, chemistry cuz you got to get the fuel through there and you got to get the fuel to begin to atomize so it can then vaporize. You can't burn liquid fuel. though is doing more than just delivering fuel. You have to begin to atomize that fuel, right? And a lot of people will tell me, well, the job of the main well is to atomize the fuel. I don't look at that way. I look at the main well, it's got you can run a one degree taper, you can run a twoderee taper, you can run a two and a half, three°ree taper. And this changes a lot of things. All those emulsion bleeds act as timers on how they actually will allow you to pull fuel in. Okay. What's an emulsion bleed? Emotion bleed. That's for a different That's for different video. We'll have to pull 202 or 2011. That's that's high-end stuff. Explain those two pieces over there or these the different pieces. These are the two here. They're angular discharge and they basically have inserts. And these inserts come in a 500 ID, a 550, and a 600. And you can put whatever holes design that you think would work. These are all very symmetrical. We have done it to where we do five on one side and do one way over here. Then we would take and clock the insert to balance out the air fuel ratio from cylinder cylinder bias. And here's the banjo that they sit in. They just get pressed in there and the fuel goes around and these goes all the way down inside. And these are the drop legs that will make more horsepower than these. Will flow more air. That is a stock booster. As you can see, there's no back cut in it. It's got a very small hole. And the problem is is being this booster has no back cut like this. This one was a lot easier for it to pull fuel out at a lower RPM. High RPM it doesn't matter. It's still drawing fuel out of it. But once you get to where So would this be like where the difference becomes between like a street car carburetor and a a wide open race car Exactly. carburetor. Yeah. This is a carburetor that's what booster that's used for a 750 down leg and a 4412 Holly. So we found out that you put a back cut in those things. Now you there's other things you can do with…