750 Brawler vs 650 AVS 2 at the track, right OOTB !

Hysteric said
No they don't. Both triple stage boosters and annular boosters increase signal because the are more restrictive. What is "correct" is to reference the booster signal required to the vacuum generated by the engine. Again stick a Dominator (1050) on a 318 and tell me all about atomization when you don't create enough vacuum to actually lift the fuel up through the main well and out to into the booster channel.

Triple stage Boosters actually double the depression by multiplying the depression created by the initial booster.

Here's none other than John Kaase clearly showing the pulsations that take place in a manifold. What do you think is pushing his finger back towards the carbs? Look at all that "atomized" liquid fuel on the walls and runners making its way to the intake valve..........

Amazing Video: Jon Kaase Tests Airflow Dynamics With His Finger

What do you think those pulsations will do to carb signal? What do think all that black **** on the underside of the air cleaner is and how does it get there?

Annular and triple-stack boosters increase signal because they are more sensitive to the pressure differential and air velocity through the venturi.

The "vacuum" used to draw fuel through the boosters is created by the venturis themselves. The simple fact that there is air flowing through them does it; it has no relation whatsoever with the amount of vacuum in the intake manifold below the throttle butterflies. If it was dependent on manifold vacuum then there would be no purpose in having a venturi in a carburetor in the first place; even if you put a lawnmower carburetor on a big block so it has 10 in-Hg vacuum at WOT it won't function without a venturi.

@318willrun stuck dual 600 cfm carbs on a mild 318. There's probably hardly any manifold vacuum to speak of at WOT yet it has excellent response and power if you go watch his videos. I'm over arguing about this, believe what you want.