Page 538 - 2018 Racecar Engineering Drag Racing Parts and Accessories Catalog

Q-Series Drag Racing Carburetors Black Diamond Q-Series
With high flow main bodies and fuel bowls, billet Drag Racing Carburetors
metering blocks, throttle bodies, and adjustable secondary pump Q-Series mechanical secondary
cam brackets, these four barrel drag carbs deliver crisp, reliable carburetors include the addition of
throttle response. Available for use with gasoline, alcohol and E85. high temperature, satin black coat-
Gasoline Alcohol E85 ing that is totally impervious to under
Description Part No. Part No. Part No. hood chemicals and fuels. Carburetors
650 CFM, Mech. Secondaries QFTQ-650 — — combine the benefits of high flow main bodies
650 CFM, Blower 2 x 4 QFTQ-650-B2 — —
650 CFM, Vac. Secondaries QFTQ-650-PV — — and fuel bowls, billet metering blocks and throttle bodies, and
750 CFM, Mech. Secondaries QFTQ-750 — QFTQ-750-E85 adjustable secondary pump cam brackets. Offered for use with
750 CFM, Mech. gasoline only.
Secondaries, Annular QFTQ-750-AN — — Part No. Description
750 CFM, Mech. Secondaries, QFTBDQ-650 650 CFM Carburetor
Blow-Thru QFTQ-750-BAN — QFTQ-750-E85BAN QFTBDQ-750 750 CFM Carburetor
750 CFM, Blower 2 x 4 QFTQ-750-B2 — — QFTBDQ-850 850 CFM Carburetor
750 CFM, Vac. Secondaries QFTQ-750-PV — — QFTBDQ-950 950 CFM Carburetor
850 CFM, Mech. Secondaries QFTQ-850 QFTQ-850-A QFTQ-850-E85
850 CFM, Mech.
Secondaries, Annular QFTQ-850-AN — — Black Diamond
850 CFM, Vac. Secondaries QFTQ-850-PV — — SS-Series Carburetors
950 CFM, Mech. Secondaries QFTQ-950 QFTQ-950-A QFTQ-950-E85 High performance, street/strip
950 CFM, Mech.
Secondaries, Annular QFTQ-950-AN — — carburetors feature a durable,
1050 CFM, Mech. Secondaries QFTQ-1050 QFTQ-1050-A — high temperature satin black coat-
1050 CFM, Mech. ing that is unaffected by all under
Secondaries, Annular QFTQ-1050-AN — — hood chemicals and fuels. Carburetors
are assembled using billet metering blocks,
Race Q-Series Drag Racing Carburetors billet throttle body, all aluminum Proform main body and dual inlet
Exclusively for drag racing, RaceQ-series fuel bowls. Changeable air bleeds, tunable secondary opening
carburetors have high flow aluminum rate (vacuum secondary models only) and power valve chan-
bodies, billet metering blocks and throttle nel restrictions allow exceptional tunability. Offered for use with
bodies and die cast aluminum fuel bowls gasoline only.
for reliable, consistent performance. All Part No. Description
have mechanical secondaries and are for QFTBD-1957 600 CFM Vacuum Secondary Carburetor
single carburetor, gasoline engines only. QFTBD-650 650 CFM Mechanical Secondary Carburetor
QFTBD-680-VS 680 CFM Vacuum Secondary Carburetor
Gasoline Gasoline/Annular QFTBD-750 750 CFM Mechanical Secondary Carburetor
Description Part No. Part No. QFTBD-780-VS 780 CFM Vacuum Secondary Carburetor
750 CFM QFTRQ-750 QFTRQ-750-AN QFTBD-830 830 CFM Mechanical Secondary Carburetor
850 CFM QFTRQ-850 QFTRQ-850-AN QFTBD-850 850 CFM Mechanical Secondary Carburetor
950 CFM QFTRQ-950 —
1000 CFM QFTRQ-1000 —
1050 CFM QFTRQ-1050 QFTRQ-1050-AN SS-Series Carburetors
1050 CFM, 3-Circuit QFTRQ-1050-3 — Specifically designed for high
performance street/strip opera-
QFX-Series Drag Racing Carburetors tion, SS-Series carburetors
QFX-series carburetors are ideal for have been developed using
throttle stop and bracket racing, com- years of successful race track
bining die cast aluminum main bodies, experience. Carbs combine billet
CNC-machined billet metering blocks metering blocks, billet throttle body, all
and aluminum fuel bowls with extended aluminum Proform main body and dual inlet
venturi for increased low- and mid-range aluminum fuel bowls. Changeable air bleeds, tunable
torque. Annular boosters and CNC-machined inserts increase flow, secondary opening rate and power valve channel restrictions
strengthen vacuum signal and improve fuel emulsion. Available allow exceptional tunability. Offered in vacuum and mechanical
for single and dual carbureted gasoline, or single carbureted secondary versions with conventional or annular boosters.
alcohol setups. Mechanical Mech. Second. Vacuum
Secondaries Annular Secondaries E85
Single 4BBL Dual 4BBL Single 4BBL
Description Gasoline Part No. Gasoline Part No. Alcohol Part No. Description Part No. Part No. Part No. Part No.
1050 CFM, 650 CFM QFTSS-650 QFTSS-650-AN — QFTSS-650-E85
1.710" Venturi, 2-Circuit QFTFX-4700 — — 680 CFM — — QFTSS-680-VS —
1050 CFM, 1.710" Venturi QFTFX-4710 QFTFX-4710-2 QFTFX-4710-A 735 CFM — — QFTSS-735-VS —
1050 CFM, 1.750" Venturi QFTFX-4710-1 — — 750 CFM QFTSS-750 QFTSS-750-AN — QFTSS-750-E85
1050 CFM, 1.710" Venturi, 780 CFM — — QFTSS-780-VS —
780 CFM,
E85 Application QFTFX-4710-E85 — — Gauge Rule — — QFTSSR-780-VS † —
1150 CFM, 1.800" Venturi QFTFX-4711 — QFTFX-4711-A 830 CFM QFTSS-830 — — —
1150 CFM, 1.825" Venturi QFTFX-4711-1 — —
1250 CFM, 1.900" Venturi, QFTFX-4712 QFTFX-4712-2 QFTFX-4712-A † Meets NHRA/IHRA gauge rules, 1.375" primary, 1.437" secondary and
2.125" Throttle 1-9/16" throttle bore.
1450 CFM, 2.000" Venturi,
2.250" Throttle QFTFX-4714 — —
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