VRS-4150 Series 850cfmPerformance Carburettor Mechanical Secondaries. No Choke

Edelbrock’s VRS-4150 lineof 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 Carburetorsfeatures a street throttle arm, PTFE-coated throttle shafts and built-in provisionsfor a standard GM three-wire TPS mount add features to thiscarburetor 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 withlarger capacity fuel bowls andfour 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 jetextender notches and jet extenders in the rear to keep the jets covered in fuel underhard acceleration.

With the new VRS series, users are able to externally adjust idleair and the adjustment screws are accessible without removing the air cleaner/scoop. The advanced idle circuit features interchangeable idle dischargejets in all four corners to allow for a smooth, clean idlewith the use of big, low-vacuum camshafts. Normallyfound only in high end racing carbs, the VRS includes fully adjustable intermediate fuel circuits, which help to provide incredible throttle response. Finally, for greatercontrol 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 secondariesthat support optimized jetting. The power valve will add fuel as necessary while the power valve protection circuit prevents diaphragm damage from backfires.