Top 10 Holley 650 Vacuum Secondary

Product Description

This carburetor features a vacuum secondary with a metering plate that has no jets, power valves, or accelerator pumps which makes it easier to tune than full race carburetors with temperamental secondary metering blocks and dual pumps. It mixes the right amount of gasoline with air so that the engine runs properly. It is calibrated for gasoline and engineered to improve performance.

From the Manufacturer

FEATURES

• Model 4160 HP
• Superior performance and drivability in an easy-to-tune package
• 100% wet-flow tested and street calibrated
• All-metal parts(no plastic stuff)
• Not For Sale in California on Pollution Controlled Motor Vehicles
• Bright shiny finish
• Electric choke
• Center hung float bowls
• Vacuum secondaries
• Power valve blow-out protection
• Ford A/T kickdown
• 100% wet-flow tested and calibrated

WARRANTY
Limited warranty

The Street HP uses the best features from Holley’s race Bred 4150 HP carbs, but tamed for street and light competition use. The Street HP features the contoured main body from the 4150 HP and has a tumble polished shiny finish and screw in air bleeds for precision tuning capabilities. The metering system includes a timed spark port for a vacuum advance distributor and is calibrated for a hot street/strip engine setup for outstanding throttle response and drivability. A street HP base plate is used so there are plenty of vacuum ports for power brakes, PCV, etc. The Street HP takes all the great features from the race HP and the Double Pumper and combines them into the perfect street/strip carburetor.

Brand New Holley 625 CFM Street Demon Carburetor, with Electric Choke & Vacuum Secondaries (Part #1900)

Features:
• Ball burnished shiny aluminum finish
• Designed for use on most stock to mildly modified V8 engines
• Patented timeless design fits modern as well as traditional themed vehicles (Patent No.: US D648,746 S)
• One piece airhorn easy to clean & maintain
• Dual mounting bolt pattern – fits most aftermarket spread/square bore intake manifolds w/out adapter
• Integrated fuel bowl/main body design w/ gasket above fuel level, no plugged passages to eliminate all potential leak paths
• Small 1-3/8″ primary throttle bores combined w/ proven Triple-Stack boosters deliver amazingly crisp throttle response & drivability, superior fuel atomization & improved fuel economy
• GVS makes total air flow 625 CFM while maintaining crisp throttle response delivered by small primary bores
• Secondary air valve control – torsion spring valve control/adjustment permits seamless primary to secondary throttle response regardless of throttle opening rate (unique contoured profile developed for better cylinder to cylinder fuel distribution)
• 2 Stage metering rods control easily accessible w/out carburetor disassembly or removal
• Single fuel inlet for simple installation
• Integrated 700R4/200R4 transmission kickdown cable mounting location as well as Ford A/T kickdown for proper shifts
• 625 CFM specific calibration kit available for tuning & altitude adjustments
• Available TPS kit allows use w/ 4L60 & 4L80 transmissions

This carburetor is available in a variety of configurations for street, strip, and track performance. The vacuum secondary helps heavy vehicles with automatic transmission performance, street gearing, and engines built for low-end horsepower. It includes an electric choke which is designed to supply a rich fuel mixture to the engine for cold starts and drive-away conditions and the screw-in air bleeds offer precision tuning capabilities. It also comes with all necessary vacuum ports for easy street vehicle installation.

BEST IN CLASS

Holley Replacement Carburetors are Engineered to Improve Performance and Keep You Emission Legal. The 0-9895 is a Model 4175™ Spread Bore designed to fit several applications. See application chart below in tech resources for specific details.

Brand New Holley 650 CFM Aluminum Speed Demon Carburetor, Shiny, Vacuum Secondaries, Down Leg Booster, Compatible with Gasoline (Part #SPD-650-VS)

NOTE: This carburetor has the square bore flange bolt pattern. It can replace 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 will need an adapter to install this carburetor, similar to the Mr. Gasket #1932.

Features:
• Polished die-cast aluminum construction
• Engineered & calibrated for better drivability & full throttle performance
• Fuel bowls & main body have been redesigned
• New throttle lever with integrated Ford A/T, 700-R4 & Chrys. kick down options
• Fuel bowls have dual threaded inlets on each side, dual sight glass windows & internal baffling for improved fuel slosh control
• Secondary fuel bowls include notched floats & jet extensions to prevent fuel starvation during hard launches
• Changeable idle, high-speed air bleeds & power valve restrictions for precise tuning

Specs:
• Barrels: 4
• Booster: Down Leg
• Brand: Demon
• CFM: 650
• Choke: Electric
• Circuit: 2
• Finish: Shiny
• Fuel: Gasoline
• Fuel Inlet: Dual
• Fuel System: Carbureted
• High Speed Air Bleed: 28
• Idle Air Bleed Size: 70
• Marine Use: No
• Material: Aluminum
• Model: Speed Demon
• Primary Main Jet: 68
• Primary Power Valve: 6.5
• Primary Pump Nozzle Size: 31
• Product Type: Carburetor
• Secondaries: Vacuum
• Secondary Main Jet: 78
• Supercharged Application: No
• Throttle Bore: 1.688″

Brand New Holley 650 CFM Aluminum Mighty Demon Carburetor, Shiny, Vacuum Secondaries, Down Leg Booster, Compatible with Gasoline (Part #RDA-650-VS)

Features:
• Aluminum polished construction with billet metering blocks & base plate
• Fuel bowls & main body have been redesigned
• Re-engineered & re-calibrated for better drivability & full throttle performance
• Re-designed throttle lever with integrated Ford A/T, 700-R4 & Chrys. kick down options
• Fuel bowls – Dual threaded inlets on each side, dual sight glass windows & internal baffling for improved fuel slosh control
• Changeable idle, high-speed air bleeds & power valve restrictions for precise tuning
• Billet Baseplate with Idle-Eze allows precision fine tuning of idle speed giving a smoother transition from off-idle

Specs:
• Barrels: 4
• Billet Color: Shiny
• Booster: Down Leg
• Brand: Demon
• CFM: 650
• Choke: Electric
• Circuit: 2
• Finish: Shiny
• Fuel: Gasoline
• Fuel Inlet: Dual
• Fuel System: Carbureted
• High Speed Air Bleed: 28
• Idle Air Bleed Size: 70
• Marine Use: No
• Material: Aluminum
• Model: Road Demon
• Primary Main Jet: 70
• Primary Power Valve: 6.5
• Primary Pump Nozzle Size: 31
• Product Type: Carburetor
• Secondaries: Vacuum
• Secondary Main Jet: 76
• Supercharged Application: No
• Throttle Bore: 1.688″

Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every Monster Energy Nascar Cup team and nearly every NHRA Pro–Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM’s popular LS engine are dominating the LS scene as well. Holley’s products also include performance fuel pumps, intake manifolds & engine dress–up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies we can give you the edge you need over the competition!