One primarily aimed at our American and Canadian readers – ALL WELCOME – but as Summit Racing ships worldwide wherever you are in the world, is irrelevant.
Whether you’re replacing an aging carburettor, building a street terror, or chasing ETs, Edelbrock VRS-4150 Carburettors put race-level tuning power in your hands.
Instead of the basic idle and main metering circuits found in conventional 4150 carbs, the VRS-4150 features four metering circuits per venturi and externally adjustable screw-in air bleeds, giving you precise control over the fuel curve for maximum performance. Dual idle bypass screws make it easy to dial in a stable idle on aggressively cammed engines without opening the throttle blades, improving both tuning flexibility and drivability. Edelbrock also built in a provision for a GM three-wire TPS, making the VRS-4150 ready for data logging and transmission swaps using popular electronic overdrives like the 4L60E and 4L80E.
Edelbrock offers the VRS-4150 in both petrol/gasoline and E85 configurations, giving builders the flexibility to match their carburettor to their fuel strategy. Gasoline versions provide exceptional street and race performance, delivering crisp throttle response, drivability, and wide-open power. E85 models are optimised for ethanol’s higher fuel-volume requirements, cooling benefits, and greater octane potential.
Other features include:
• One-piece main body/throttle plate construction
• 1/2-inch taller main body than a standard 4150 carb to stabilise fuel delivery
• Throttle body flange drilled for both 4150- and Dominator-style bolt patterns
• Annular discharge boosters for 850/950 cfm gas and E85 carbs
• Down-leg boosters for 650 and 750 cfm gas carbs
• Dual 50cc accelerator pump circuits
• Billet primary and secondary metering blocks with power valves to optimize jetting
• 20% larger fuel bowls with internal ribs and baffles to reduce fuel slosh and aeration
• Dual -6 AN fuel inlets provide flexible fuel line routing options
• Secondary fuel bowl jet extenders keep jets covered during hard acceleration
• Nitrophyl floats with cut corners help prevent fuel-flow interruption during hard cornering
• Borosilicate sight glass windows for quick float-level adjustment
• Two additional linkage positions to adjust mechanical secondary opening rate
• Vacuum ports for PCV, power brakes, vacuum advance, and transmission modulators
• Compatible with standard 4150 carb replacement and tuning components, including main jets, air bleeds, and power valves
Edelbrock VRS-4150 Carburetors are available for gasoline engines in 650, 750, 850, and 950 cfm models, and in E85 versions with 850 and 950 cfm ratings.
It’s easy to get caught up in cfm numbers, and a bigger cfm carburetor doesn’t automatically make more power. In fact, too much carb can hurt performance. Use our CFM Calculator to find the sweet spot for your combination.
If you want to geek out on even more VRS-4150 carburetor tech, check out our OnAllCylinders article and this Edelbrock video to learn how this carb’s advanced metering circuits, fuel-control features, and race-inspired design can help you get the most from your combination.