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Demon Dimensions

2bbl Road Demon, 2bbl Race Demons & 2 bbl Race/RS Demons

2barrel Top View
Cast-venturi 2-barrel carburetor are identified by a single digit cast into the top of the main body, next to the vent tube. 350 ci carburetors have a "3" cast into the top of the body, and 500 ci carburetors have a "5" cast into the top of the body. 2-barrel "RS" (removable sleeve) carburetors are identified by the color of the venturi:
Color Size
Green435
Purple500
Red525
Blue575
Gold625
Black695
Silver725
2barrel Side View
Road Demon Jr & Road Demons

The Road Demon Jr carburetors feature side-hung float bowls, but share the rest of the identifiable markings wih the Road Demon. Both have vacuum-secondary operation with a silver-topped vacuum pod. Their size is determined by the single digit and booster size.
Number Type of Booster Size
6Annular525
6Downleg + Annular625
7Downleg + Annular725
Speed Demons

Twin Squirter (mechanical secondary) carburetors with choke towers are Speed Demons. Vacuum-secondary carburetors with red topped vacuum pods are Speed Demon VE Series. The size is identified by the single digit cast into the body and by the type of boosters in the venturi.
Number Type of Booster Size
6Annular575
6Downleg650
7Downleg750
8Downleg850
8Annular850
Speed Top View
Demon Carburetors - Overhead View
Applications
Mark Description
BCBlower Carb
DRDrag Race
GCGeneral Competition
OTOval Track
RRRoad Race
TRTunnel Ram
 

Size
Number Race Demon Mighty Demon
28650650
40750750
42825825
561000 or 820 (w/annular boosters)850
*56 - All RS carburetors have this stamping
Note: Road Demons have no size identification
King Demon Top View
Mighty/Race Demon
Race Demon/RS Sleeve Specifications
Color Code Venturi x Baseplate Sizes Size
Orange1.064 x 1-7 1/16390
Green1.280 x 1-11/16675
Red1.400 x 1-11/16750
Blue1.425 x 1-3/4775
Gold1.500 x 1-3/4825
Black1.562 x 1-3/4975
Silver1.590 x 1-3/41025*
Purple1.370 x 1-11/161050**
*820 with annular boosters
**950 with annular boosters
Race/Kin Demon
King Demon/RS Sleeve Specifications
Sleeve Color Venturi / Butterfly Size Size
Green1.500 x 1.800795
Red1.562 x 1.800895
Blue1.625 x 2.000995
Gold1.720 x 2.0001095
Black1.812 x 2.0001195
Silver1.838 x 2.1001295