BRAND NEW HOLLEY ULTRA XP CARBURETOR, 4BBL, 750 CFM, POLISHED, NO CHOKE, 4150 MODEL, COMPATIBLE WITH GASOLINE
XTREME PERFORMANCE - HOLLEY ULTRA XP CARBURETORS! UP TO 38% LIGHTER THAN OUR TRADITIONAL RACE CARBS, HAVE FUEL CAPACITY THAT IS 20% GREATER AND 30 OTHER NEW FEATURES! HOLLEY ULTRA XP CARBURETORS OFFER NEW FEATURES SUCH AS AN INTEGRATED IDLE BYPASS VALVE THAT ALLOWS FOR IDLE ADJUSTMENTS WHILE MAINTAINING THE CORRECT THROTTLE PLATE TO TRANSFER SLOT RELATIONSHIP.
ALSO INCLUDES 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. OTHER FEATURES INCLUDE ALL ALUMINUM CONSTRUCTION, FULLY TUNABLE BILLET METERING BLOCKS, BILLET BASE PLATE, ADJUSTABLE SECONDARY LINKAGE AND KNURLED (HAND ADJUSTABLE) CURB IDLE SCREWS. HOLLEY ULTRA XP CARBURETORS ARE THE ULTIMATE IN SQUARE BORE RACE CARBURETORS!
NOTE: THIS MODEL OF CARBURETOR HAS THE SQUARE BORE FLANGE BOLT PATTERN. IT CAN REPLACE HOLLEY, EDELBROCK, CARTER AFB, AND AUTOLITE STYLE CARBURETORS WITH 5 3/16" X 5 5/8" BOLT PATTERN. IF YOU HAVE A SPREADBORE STYLE INTAKE MANIFOLD, YOU WILL NEED AN ADAPTER TO INSTALL THIS CARBURETOR. SIMILAR TO THE MR. GASKET #1932.
FEATURES:
ALUMINUM CONSTRUCTION (SAVES 4.5 LBS - 38% WEIGHT SAVINGS)
SHINY WITH BLACK ANODIZED BILLET ALUMINUM METERING BLOCKS AND BASE PLATE
DESIGNED FOR USE ON DRAG RACE, CIRCLE TRACK, OR ANY HIGH HORSEPOWER ENGINES
CONTOURED VENTURRI INLET OFFERS BALANCED AIRFLOW FOR INCREASED HORSEPOWER
AIR BLEEDS MOVED OUTWARD TO ALLOW A SMOOTHER TRANSITION OF AIRFLOW FROM THE TOP OF THE CARBURETOR INTO THE VENTURII
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.
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 AND SAFE FUEL LEVEL ADJUSTMENTS
BUILT IN DRAIN PLUG IN FRONT CENTER OF BOWL PROVIDES EASY ACCESS TO EMPTY CONTENTS OF BOWL
8AN (O-RINGED) INLET THREADS OFFER A LARGE VARIETY OF PLUMBING OPTIONS AND CAN BE PLUMBED FROM EITHER SIDE
4 CORNER IDLE ALLOWS YOU TO PRECISELY CONTROL YOUR IDLE SYSTEM
MECHANICAL SECONDARIES FOR PERFECT OFF THE LINE LAUNCHES
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 AND SECONDARY CURB IDLE SCREWS ALLOW FOR EASY IDLE ADJUSTMENT WITHOUT THE USE OF TOOLS
PRIMARY THROTTLE SHAFT CAPPED TO PREVENT ENTRY OF DEBRIS & CONTAMINATES
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
STAINLESS STEEL ADJUSTABLE SECONDARY LINK. PROVIDES CHOICE OF 1:1 OR PROGRESSIVESECONDARY THROTTLE ACTUATION FOR ULTIMATE CONTROL OF SECONDARY OPENING RATE
BASEPLATE DESIGNED WITH A BOSS THAT CAN BE CONSUMER MACHINED FOR VACUUM SOURCE
INCLUDES NOTCHED FLOAT AND JET EXTENSIONS
100% WET-FLOW TESTED BY HOLLEY TECHNICIANS TO ASSURE IT ARRIVES READY TO RUN
SPECS:
BARRELS: 4
BILLET COLOR: SHINY WITH BLACK BILLET
BOOSTER: DOWN LEG
BRAND: HOLLEY
CFM: 750
CHOKE: NONE
CIRCUIT: 2
EMISSION CODE: 3
FINISH: POLISHED
FUEL: GASOLINE
FUEL INLET: DUAL
MATERIAL: ALUMINUM
MODEL: 4150
PRIMARY & SECONDARY MAIN JET: 76
PRIMARY POWER VALVE: 6.5
PRIMARY & SECONDARY PUMP NOZZLE SIZE: 32
PRODUCT TYPE: ULTRA XP CARBURETOR
SECONDARIES: MECHANICAL
SUPERCHARGED APPLICATION: NO
THROTTLE BORE: 1.688"
VENTURII SIZE: 1.376"
YOU CAN VIEW AND DOWNLOAD THE COMPLETE ASSEMBLY INSTRUCTION BOOKLETS FOR THIS CARBURETOR HERE, AND THE CARBURETOR NUMERICAL LISTING HERE.
