Page 611 - 2022-23 Auto Performance Drag Racing

Q-Series Drag Racing Carburetors
With high-flow main bodies and fuel bowls, billet metering blocks, throt-
tle bodies, and adjustable secondary pump cam brackets, these four-barrel drag carbs deliver crisp, reliable throttle response. Available for use with gasoline, alcohol, and E85.
Black Diamond Q-Series Drag Racing Carburetors
Q-Series mechanical secondary carbure- tors include the addition of high- temperature, satin black coating
that is totally impervious to under-hood chemicals and fuels. Carburetors combine the ben-
efits of high-flow main bodies and
fuel bowls, billet metering blocks and
throttle bodies, and adjustable secondary
pump cam brackets. Offered for use with gasoline only.
DRAG RACING
Description
Gasoline Part No.
Alcohol Part No.
E85 Part No.
650 CFM, Mech. Secondaries
QFTQ-650
—
—
650 CFM, Blower 2 x 4
QFTQ-650-B2
—
—
750 CFM, Mech. Secondaries
—
—
QFTQ-750-E85
750 CFM, Mech. Secondaries, Annular
QFTQ-750-AN
—
—
750 CFM, Mech. Secondaries, Blow-Thru
QFTQ-750-BAN
—
QFTQ-750-E85BAN
750 CFM, Blower 2 x 4
QFTQ-750-B2
—
—
850 CFM, Mech. Secondaries
—
QFTQ-850-A
QFTQ-850-E85
850 CFM, Mech. Secondaries, Annular
QFTQ-850-AN
—
—
950 CFM, Mech. Secondaries
—
QFTQ-950-A
—
Part No.
Black Diamond SS-Series Carburetors
Description
QFTBDQ-650
650 CFM Carburetor
QFTBDQ-750
750 CFM Carburetor
QFTBDQ-850
850 CFM Carburetor
QFTBDQ-950
950 CFM Carburetor
Race Q-Series Drag Racing Carburetors
Exclusively for drag racing, RaceQ- series carburetors have high-flow aluminum bodies, billet metering blocks and throttle bodies, and die-cast aluminum fuel bowls for reliable, consistent performance. All have mechanical secondaries and are for single carburetor gasoline engines only.
QFX-Series Drag Racing Carburetors
QFX-series carburetors are ideal for
throttle stop and bracket racing,
combining die-cast aluminum
main bodies, CNC-machined billet
metering blocks, and aluminum
fuel bowls with extended venturi
for increased low- and mid-range
torque. Annular boosters and CNC-machined inserts increase flow, strengthen vacuum signal, and improve fuel emulsion. Available for single carbureted gasoline or single-carbureted alcohol setups.
High-performance street/strip
carburetors feature a durable,
high- temperature satin black
coating that is unaffected by
all under-hood chemicals and
fuels. Carburetors are assem-
bled using billet metering blocks,
billet throttle body, all aluminum
Proform main body, and dual-inlet fuel
bowls. Changeable air bleeds, tunable secondary opening rate (vacuum secondary models only) and power valve chan- nel restrictions allow exceptional tunability. Offered for use with gasoline only.
Part No.
SS-Series Carburetors
Description
QFTBD-1957
600 CFM Vacuum Secondary Carburetor
QFTBD-650
650 CFM Mechanical Secondary Carburetor
QFTBD-680-VS
680 CFM Vacuum Secondary Carburetor
QFTBD-750
750 CFM Mechanical Secondary Carburetor
QFTBD-780-VS
780 CFM Vacuum Secondary Carburetor
QFTBD-850
850 CFM Mechanical Secondary Carburetor
Description
Gasoline Part No.
Gasoline/Annular Part No.
750 CFM
QFTRQ-750
—
850 CFM
QFTRQ-850
—
950 CFM
QFTRQ-950
—
1000 CFM
QFTRQ-1000
—
1050 CFM
QFTRQ-1050
QFTRQ-1050-AN
Specifically designed for high-
performance street/strip opera-
tion, SS-Series carburetors have
been developed using years of
successful race track experience.
Carbs combine billet metering blocks,
billet throttle body, all aluminum Proform
main body, and dual-inlet aluminum fuel bowls. Changeable air bleeds, tunable secondary opening rate, and power valve channel restrictions allow exceptional tunability. Offered in vacuum and mechanical secondary versions with conven- tional or annular boosters.
Description
Mechanical Secondaries Part No.
Mech. Second. Annular Part No.
Vacuum Secondaries Part No.
650 CFM
QFTSS-650
QFTSS-650-AN
—
680 CFM
—
—
QFTSS-680-VS
750 CFM
QFTSS-750
QFTSS-750-AN
—
780 CFM
—
—
QFTSS-780-VS
Description
Single 4BBL Gasoline Part No.
Single 4BBL Alcohol Part No.
1050 CFM,
1.710" Venturi, 2-Circuit
QFTFX-4700
—
1150 CFM, 1.800" Venturi
QFTFX-4711
QFTFX-4711-A
1250 CFM, 1.900" Venturi, 2.125" Throttle
QFTFX-4712
—
1450 CFM, 2.000" Venturi, 2.250" Throttle
QFTFX-4714
—
609
2022-23