VRS-4150 Series 850cfm Performance Carburettor
Mechanical Secondaries. No Choke

Edelbrock’s VRS-4150 line of race and performance carburetors are packed with features that will appeal to racers, engine builders and carb tuners, as well as the hot street enthusiast looking to improve performance.

The Edelbrock VRS-4150 Carburetors features a street throttle arm, PTFE-coated throttle shafts and built-in provisions for a standard GM three-wire TPS mount add features to this carburetor that are ideal for any race or ultra high-performance applications. Multiple vacuum hook-ups keep it usable on the street but still ready for the track with larger capacity fuel bowls and four circuit billet metering blocks with screw-in emulsion bleeds. All of this makes for easy tuning and great versatility in many applications.

The 20% larger capacity fuel bowls feature internal ribs to control fuel slosh, and a sculpted baffle directs incoming fuel to the sides to minimize bubbles. The floats have corner cuts to avoid shutting off the fuel flow during hard cornering, and jet extender notches and jet extenders in the rear to keep the jets covered in fuel under hard acceleration.

With the new VRS series, users are able to externally adjust idle air and the adjustment screws are accessible without removing the air cleaner/scoop. The advanced idle circuit features interchangeable idle discharge jets in all four corners to allow for a smooth, clean idle with the use of big, low-vacuum camshafts. Normally found only in high end racing carbs, the VRS includes fully adjustable intermediate fuel circuits, which help to provide incredible throttle response. Finally, for greater control at high RPM, the high speed/main fuel circuit is split into two bleed circuits - one each for the lower and upper sections.

One final feature is the power valves that are located on both primaries and secondaries that support optimized jetting. The power valve will add fuel as necessary while the power valve protection circuit prevents diaphragm damage from backfires.