Connect with us

Hi, what are you looking for?

Products

Quick Fuel Technology Introduces Three New 450cfm 4V Carburetors

Throttle response can be more important than peak horsepower, especially for most street vehicles, and nothing affects throttle response more than carburetor size. Prior to Quick Fuel Technology’s® (QFT’s) new 450cfm four-barrel carbs, folks with small V8s and 4- and 6-cylinder engines had to work with 600cfm or 650cfm carbs. Regardless of calibration, airflow and fuel curves were rarely optimal.

QFT has solved this dilemma with three new 450cfm models centered around a single die-cast aluminum main body with 1.090” venturis and 1-9/16” throttle plates. There is a mechanical secondary HR-Series, a polished vacuum secondary Slayer model and a Black Diamond® version of the Slayer. These carbs feature normal 4150 modular carb dimensions such as air-horn diameter and baseplate bolt pattern – so they bolt to 4150-flanged intake manifolds and accept traditional four-barrel air cleaners.

QFT’s HR-450 model shows its true performance heritage with mechanical secondaries, dual metering blocks and dual-inlet fuel bowls. The only visible concession to daily street driving is the electric choke. Enthusiasts are already sizing up these carbs as ideal for small-block street tunnel rams. Install the 1:1 Quick-Link™ secondary link for cruise night antics, then swap back to the 40% link for more economical daily driving.

The Slayer SL-450-VS and BD-450-VS offer all of the adjustability of the original Slayer carb and feature the single-inlet, side-hung fuel bowls that make them so adaptable to early muscle cars and O.E. replacements. They both have vacuum secondaries with QFT’s Quick-Set™ single screw adjustment and electric chokes. They are completely adjustable with changeable air bleeds and primary and secondary main jets. The Black Diamond® version lowers fuel temperatures by up to 6% and is scratch and corrosion resistant.

Click to comment

Leave a Reply

Your email address will not be published.

Advertisement
Advertisement
Advertisement
Advertisement

You May Also Like

News

Tony Christian, one of the pioneering drivers of the Pro Street movement, passed away Thursday, June 9. Christian was infamous for his battles with...

News

The Mid-West Drag Racing Series (MWDRS) is saddened over the passing of Pro Mod driver Ronnie Hobbs following an on-track incident during Friday night...

Exclusive

Leah Pruett scored the first NHRA Top Fuel win for her and husband Tony Stewart’s professional drag racing team this past weekend in Denver,...

News

Drag racer Sean Serra has passed away in a tragic car accident. He was 27 years old. Serra was involved in a single-car rollover...

Since 2005, DI has informed, inspired and educated drag racers from every walk of the racing life - weekend warrior and street/strip enthusiasts to pro-level doorslammer and Top Fuel racers. From award-winning writing and photography to binge-worthy videos to electric live events, DI meets hundreds of thousands of racers where they live, creating the moments that create conversations.