Description

All new for Demon, the new aluminum Road Demon carburetors are showing a new lighter, sleeker look and calibrated for Street Rods and mildly modified Street Machines and light trucks, the Road Demon™ is an impressive performer. With a remarkably smooth choke tower design and patented air entries, the Road Demon™ offers extremely smooth operation with strong throttle response. The Road Demon™ has the standard Demon carburetor features: Cast metering–blocks with adjustable jets and four–corner idle, plus large capacity fuel bowls with patented sight glasses for tuning ease. Available in 650-850 cfm models, the Road Demon™ is perfect for all engine sizes. The Road Demon™ targets mild performance engines from 302 to 460 cid, and rated at 250–500 horsepower. Road Demons come in mechanical and vacuum secondary models which makes them ideal for daily drivers as well as weekend cruising for a wide range of vehicles.

Features:
- All aluminium polished construction with die-cast metering blocks and base plate (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 with integrated Ford A/T, 700-R4, and Chrysler kick down options.
- Fuel bowls now have dual threaded inlets on each side, dual sight glass windows, and internal baffling for improved fuel slosh control.
- Changeable idle, high-speed air bleeds & power valve restrictions for precise tuning.
- Baseplate with Idle-Eze™ allows precision fine tuning of the idle speed resulting in a smoother transition from off-idle.
- New simple part numbering system: Start with RDA (Road Demon) Add the carburetor cfm size (650, 750, or 850) and then add the model suffix; MS (Mechanical Secondaries); VS (Vacuum Secondaries); AN (Annular Discharge Boosters).
Specs:
- Barrels : 4
- Billet Color : Shiny
- Booster : Annular
- Brand : Demon
- CFM : 850
- Choke : Electric
- Circuit : 2
- Emission Code : 3
- Finish : Shiny
- Fuel : Gasoline
- Fuel Inlet : Dual
- Fuel System : Carburetted
- High Speed Air Bleed : 33
- Idle Air Bleed Size : 73
- Material : Aluminium
- Model : Demon 4150 Mechanical Secondary
- Primary Main Jet : 76
- Primary Power Valve : 6.5
- Primary Pump Nozzle Size : 33;33
- Product Type : Carburettor
- Secondaries : Mechanical
- Secondary Main Jet : 84
- Supercharged Application : No
- Throttle Bore : 1.75