CARBURETOR,4150,850CFM,ULTRA XP,SHINY/BLACK

BRAND NEW HOLLEY ULTRA XP CARBURETOR, 850 CFM, SHINY WITH BLACK BILLET, MECHANICAL SECONDARIES, 4150, COMPATIBLE WITH GASOLINE

NEW FEATURES SUCH AS AN INTEGRATED IDLE BYPASS VALVE THAT ALLOWS FOR IDLE ADJUSTMENTS WHILE MAINTAINING THE CORRECT THROTTLE PLATE TO TRANSFER SLOT RELATIONSHIP, HIGH CAPACITY FUEL BOWLS WHICH FEATURE 20% MORE FUEL CAPACITY TO ELIMINATE STARVATION, INTEGRATED FUEL SHELF TO MINIMIZE FUEL AERATION AND INTERNAL BAFFLING TO CONTROL FUEL SLOSH.

INTEGRATED IDLE BYPASS VALVE ELIMINATES THE NEED FOR HOLES IN THROTTLE PLATES AND ALLOWS FOR PROPER ADJUSTMENT OF IDLE WHILE MAINTAINING CORRECT THROTTLE PLATE TO TRANSFER SLOT RELATIONSHIP. HELPS MAINTAIN GOOD IDLE CONTROL WHEN USING RADICAL CAMSHAFTS.

OTHER FEATURES INCLUDE ALL ALUMINUM CONSTRUCTION, FULLY TUNABLE BILLET METERING BLOCKS, BILLET BASE PLATE, ADJUSTABLE SECONDARY LINKAGE AND KNURLED (HAND ADJUSTABLE) CURB IDLE SCREWS. FACTORY MACHINED ACCESSORY MOUNTING HOLE FOR EASY ADDITION OF ADJUSTABLE PRIMARY THROTTLE STOP. NEW SECONDARY PUMP CAM LEVER DESIGNED TO PROVIDE POSITIVE THROTTLE STOP ON SECONDARY SIDE.

NOTE: THIS CARB HAS SQUARE BORE FLANGE BOLT PATTERN. REPLACES HOLLEY, EDELBROCK, CARTER AFB & AUTOLITE STYLE CARBURETORS WITH 5 3/16" X 5 5/8" BOLT PATTERN. IF YOU HAVE A SPREADBORE STYLE INTAKE MANIFOLD, YOU NEED AN ADAPTER TO INSTALL THIS CARBURETOR, SIMILAR TO MR. GASKET #1932.

FEATURES:

• ALUMINUM CONSTRUCTION
• SHINY WITH BLACK ANODIZED BILLET ALUMINUM METERING BLOCKS & BASE PLATE
• DRAG RACE, CIRCLE TRACK, OR ANY HIGH HP ENGINES
• CONTOURED VENTURRI INLET
• AIR BLEEDS MOVED OUTWARD TO ALLOW SMOOTHER TRANSITION OF AIRFLOW FROM TOP OF CARBURETOR INTO VENTURII
• METERING BLOCKS FEATURE IMPROVED DURABILITY, TRUE GASKET SEALING & FULLY ADJUSTABLE
• DUAL 30CC ACCELERATOR PUMPS PROVIDE THE PERFECT AMOUNT OF FUEL FROM IDLE TO FULL THROTTLE
• FUEL BOWLS PROVIDE 20% MORE FUEL CAPACITY WHILE CONTROLLING SLOSH WITH INTERNAL BAFFLING
• CLEAR SIGHT WINDOWS ON BOTH SIDES OF BOWLS FOR EASY & SAFE FUEL LEVEL ADJUSTMENTS
• BUILT IN DRAIN PLUG IN FRONT CENTER OF BOWL
• 8AN (O-RINGED) INLET THREADS - CAN BE PLUMBED FROM EITHER SIDE
• 4 CORNER IDLE ALLOWING
• ELONGATED (DUAL PATTERN) MOUNTING HOLES ALLOW FITMENT ON INTAKES WITH SQUARE FLANGE (HOLLEY 4150 STYLE) OR LARGE FLANGE (HOLLEY DOMINATOR STYLE)
• KNURLED (HAND ADJUSTABLE) PRIMARY & SECONDARY CURB IDLE SCREWS
• PRIMARY THROTTLE SHAFT CAPPED TO PREVENT ENTRY OF DEBRIS
• STAINLESS STEEL ADJUSTABLE SECONDARY LINK. PROVIDES CHOICE OF 1:1 OR PROGRESSIVE SECONDARY THROTTLE ACTUATION
• BASEPLATE DESIGNED WITH A BOSS THAT CAN BE CONSUMER MACHINED FOR VACUUM SOURCE
• INCLUDES NOTCHED FLOAT & JET EXTENSIONS
• 100% WET-FLOW TESTED BY HOLLEY TECHNICIANS

SPECS:

• BARRELS: 4
• BOOSTER: DOWN LEG
• CFM: 850
• CHOKE: NONE
• CIRCUIT: 2
• FUEL: GASOLINE
• FUEL INLET: DUAL
• MODEL: 4150
• PRIMARY/SECONDARY MAIN JET: 84
• PRIMARY POWER VALVE: 4.5
• PRIMARY/SECONDARY PUMP NOZZLE SIZE: 32
• SECONDARIES: MECHANICAL
• THROTTLE BORE: 1.750 INCH
• VENTURII SIZE: 1.563 INCH

YOU CAN VIEW AND DOWNLOAD THE COMPLETE ASSEMBLY INSTRUCTION BOOKLETS FOR THIS CARBURETOR HERE.