Demon Carburetion 625 cfm Street Demon Carburetor 1-3/8" Primary Throttle Bores
333-1901
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625 cfm Street Demon Carburetors
DEMON CARBURETION 1901 Features:
WICKED POWER! The ALL NEW Street Demon® redefines the street carburetor with clean looks and ease of use! The Street Demon offers enthusiasts a straight forward carburetor designed to deliver a stable idle, amazingly crisp throttle response and smooth performance. Its optimized calibration and dual mounting pattern make it Run-Ready™ for a large variety of engines and vehicles- Ball burnished shiny aluminum with black composite fuel bowl
- Designed for use on most stock to mildly modified V8s
- Developed from the ground up with smooth styling - patented timeless design fits modern as well as traditional themed vehicles (Patent No.: US D648,746 S)
- One piece airhorn is easy to clean and maintain
- Aerospace Composite fuel bowl offers significant heat insulating benefits over aluminum fuel bowl - keeps fuel up to 20º cooler for optimum performance with modern fuels
- Electric Choke Management means easy cold starts
- Dual mounting bolt pattern - fits most aftermarket spread/square bore intake manifolds without adapter
- Integrated fuel bowl/main body design with gasket above fuel level and no plugged passages to eliminate all potential leak paths
- Small 1-3/8” primary throttle bores combined with proven Triple-Stack™ boosters deliver amazingly crisp throttle response and drivability, superior fuel atomization and improved fuel economy
- Goggle Valve Secondary (GVS™) throttle plate (Patent # D677755) delivers over twice the air flow of the primary bores for power you can hear and feel
- GVS™ makes total air flow 625 CFM while maintaining the 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 the throttle opening rate (unique contoured profile developed for better cylinder to cylinder fuel distribution)
- 2 Stage metering rods control easily accessible without 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
- Patent pending mechanical design
- 625 CFM specific calibration kit available for tuning and altitude adjustments
- Available TPS kit allows use with 4L60 and 4L80 transmissions
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Specifications:
Part Type
Product Line
Barrel
Four
CFM
625
Carburetor Flange
Square bore
Choke
Electric
Emission
Without EGR
Finish
Ball burnished/Black
Flange
Spread Bore
Ford Kickdown
No
Fuel
Gasoline
Fuel Inlet
Single
Fuel Type
Gasoline
Material
Aluminum / Composite
New Or Remanufactured
New
Package Depth
7.30
Package Height
13.10
Package Width
8.60
Part Category
Performance Parts
Part Fitment
Universal
Quantity
Sold individually
Secondary Type
Vacuum
Shipping Weight
8.75
Supercharged Application
No
Throttle Linkage Type
Universal
Type
Automotive
Usage
Street
Vendor Part Number
1901
1901 - Demon Carburetion Street Demon Carburetors is rated
out of
5 by
41.
Rated 5 out of
5
by
Dismantalus from
Worked great right out of the box!
Replaced a dead Q-Jet on a 1986 350 in a Chevy P30 stepvan. Installed it on the original spread bore manifold. Needed a minimum 3/8" spacer to clear the throttle blades and the manifold. For the record, I was concerned with how much the new throttle primary's were shrouded, and expected problems. Spoiler, there were none. Minor tweaks to the original air cleaner and throttle cable bracket, hooked up the fuel and vacuum advance, and it fired right up. Fast idle was dead on, choke worked properly, and kicked off the fast idle. Idle probably needs to come a bit, and I have not done any tuning yet. I'm not kidding when I say it is like having a new engine. Truck is a stick, and the Demon has made the idle so smooth and the transitioning of the various circuits make for a joy to shift it now. Pulls in second gear like a banshee. Don't need to downshift on long grades either. I had planned this carb to be a transition unit until I stepped up to Fuel Injection, but if this is how it runs with the Demon, I'm just going to leave that Demon right where it is.
Date published: 2024-05-07
Rated 5 out of
5
by
Mohamed from
Perfect ð¤©
Honestly the best carburetors ever , no lie
Date published: 2023-02-26
Rated 5 out of
5
by
Mickey93 from
Great look and throttle response
Bolted up nice on my AMC 360 and fired up on the first start right out of the box.
Perfect size for my application
Date published: 2021-11-10
Rated 5 out of
5
by
Just old Doug from
This carburetor worked perfectly, right out of the box! Almost no adjustments needed. Very easy to install, and I’m so glad the sales person directed me to purchase this item. My only slight oversight was not buying the air cleaner at the same time. The carburetor kit, is the way to go! Thanks for the help and timely delivery! “I’ll BE BACK”! As they say!
Date published: 2021-08-19
Rated 5 out of
5
by
Dog breath from
Simplicity at it’s finest
Building a new motor, the demon fits the bill, Haven’t fired it up yet
Date published: 2020-04-12
Rated 5 out of
5
by
Chvll64 from
Worked Right off the Box
Bought this for my 64 Chevelle SS and only needed a minor adjustment. Noticed a quicker take off and smooth idle. Only issue is that it has to warm up otherwise it revs a little to high in the mornings. I may may need to do another adjustment.
Date published: 2019-08-09
Rated 5 out of
5
by
RRZ383 from
Finally got the 625 street demon carburetor installed. I only had to adjust the secondary air valve and a minor adjustment to the choke heater. Spark plugs are now a tan color and the engine has crisp throttle response. Great carburetor.
Date published: 2019-03-28
Rated 5 out of
5
by
Elk lover from
I put this on a 72 chevy 3/4 4x4 firewood pu. Where I was using 3/4 tank of fuel I'm now using less than 1/4. I have more power than my edelbrock as well.
Date published: 2018-07-19
will this carb fit on a 76 lincoln mark iv 460?
The Demon 333-1901 carb can be used on a '76 460. Modifications could be necessary.
Date published: 2024-06-20
will this carb fit on JEGA intake513003?
The Demon 333-1901 carb will fit a Jegs 513003 intake.
Date published: 2024-04-01
Will this carb accept my factory Mopar dual snorkel air cleaner? 71 roadrunner w/383 and 727 trans
The Demon 333-1901 carb will work with a factory Mopar air cleaner.
Date published: 2024-03-27
Will this replace Rochester qjet without an adapter?
An adapter would be necessary for use on a quadrajet style intake.
Date published: 2024-05-10
I have a 1985 c10 350(quadrajet) th350, what besides the carb do I need to install properly?
You will need the fuel line and the linkage to connect this.
Date published: 2018-08-03
Will this carb work on a 1982 van with a 305 350 transmission
This carburetor needs a square flange intake, your 82 van probably has a quadrajet intake so you will need this adapter. https://www.jegs.com/i/JEGS-Performance-Products/555/15440/10002/-1
Date published: 2024-05-10
Does this carb come with all the necessary installation hardware or do I need to get the Demon carb install kit as well
This is just the carb only. You may want to get the install kit along with it.
Date published: 2018-02-06
Do I need any special linkage for a mopar AT application?
No, you shouldn't need any special linkage for your Mopar.
Date published: 2018-01-24
Features: All aluminum polished construction now 40% lighter than the original Demons Fuel bowls and main body have been redesigned for a sleeker, more stylish appearance Completely re-engineered and re-calibrated for better drivability and full throttle performance Re-designed throttle lever ...
Road Demon RDA-750-MS features vacuum secondaries, down leg boosters, and sized at 750 cfm.FeaturesBrand new re-engineered Road Demons are up to 40 percent lighter than the Original DemonsDie-Cast Aluminum Baseplate and Metering BlocksCalibrated to provide great drivability and wide-open throttle ...
Some parts are not legal for use in California or other states with similar laws / regulations
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
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Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.