Annular Carbs

Demon Carburetion announces a new series of 750 carburetors with annular boost venturii. Produced in Speed and Mighty versions, they are available with either mechanical or vacuumoperated secondary throttle plates. Designed as a substitute for the 650, these new annular models meet the needs of the die-hard 750 customer. They are also the ideal choice when a conventional 750 is a little too large or where the airflow capacity of a 750 carb is needed for top-end performance but throttle response is also priority.

The Speed is designed for engines with camshaft profiles of between 220°and 240° of duration at 0.050” of lift, and is ideally suited for use on muscle cars, street and custom rods, mild performance applications, crate motors, tow vehicles, etc.

For muscle cars, street and custom rods with higher performance engines: camshaft profiles of over 240° of duration at 0.050” of lift, use the Mighty with either 1-11/16” (750cfm) baseplate or 1-3/4” (800cfm).

Speed Demon with Annular Boost Venturii

1402020	750 Annular Mechanical
1402020F	750 Annular Mech. W/ Ford
1402020V	E 750 Annular Vacuum Secondary
1402020VFE	750 Annular Vac. Sec. W/ Ford
1402020EM	750 Annular Marine
1402020VEM	750 Annular Marine Vacuum
1402020VET	750 Annular Trucker Vac. W/ Choke
1402020VMT	750 Annular Trucker Vac. W/ Man Ch.

Mighty Demon with Annular Boost Venturii

5402020V	750 Annular Vacuum Secondary
5402020VF	750 Annular Vac. Sec. W/ Ford
5402020BC	750 Annular Blower Carb
5402020BM	750 Annular Blower Marine
5402020BT	750 Annular Blow Through
5402020GC	750 Annular General Competition
5402020GCF	750 Annular General Comp W/Ford
5402020GM	750 Annular Marine
5423020BC	800 Annular Blower Carb
5423020BM	800 Annular Blower Marine
5423020BT	800 Annular Blow Through
5423020GC	800 Annular Mechanical
5423020GCF	800 Annular Mech. W/ Ford
5423020GM	800 Annular General Marine
5423020V	800 Annular Vacuum Secondary
5423020VF	800 Annular Vac. Sec. W/ Ford

750 Annular Speed Demon Features:

Patented air entry design and concentric venturii -promote fine atomization and consistent cylinder filling
Billet baseplate and metering blocks-provide a solid, non-porous, trouble-free material that guarantees reliability
Patented sight windows in fuel bowls-ensure safe and easy float level checking
Adjustable four-corner idle, primary and secondary jets-offer precise idle tuning which promotes better distribution
Integral fail-safe power valve-prevents rupture during back-fire
Dual inlet ports-allows independent bowl filling
Vacuum ports: 2 constant and 1 ported-activates power brakes, distributor, PCV, transmission and other vacuum-operated accessories
Electric choke optional

750 & 800 Annular Mighty Demons contain all of the above-mentioned features plus replaceable air bleeds and idle-feed restrictors

All Annular Demon carburetors are wet-flow tested and baseline-calibrated at the factory. They are supplied with a tuning manual and instruction video. Most tuning parts used in the construction of the these carburetors will interchange with those of other modular carburetor manufacturers; i.e. jets, power valves, discharge nozzles (squirters), needle-and-seat assemblies, gaskets, etc.