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Carburetor Motor Selection - Old School Ways

Meet New School Technology

By Dakota Wentz

Contrary to what some may think, there are still a lot of guys out there who prefer carbureted motors. We gathered up a few heavy-hitters in the carburetor world to give you a taste of what's happening with the ongoing breakthroughs in the carb world. We also rounded up various air filter and plumbing manufacturers to complement the setup. Check it out.

Barry Grant
From Barry Grant (1450 McDonald Rd., Dept. SC, Dahlonega, GA 30533, 706/864-8544, www.barrygrant.com) is the King Demon ''RS'' (Removable Sleeve/Venturi) Carburetor for the race enthusiast. This four-barrel carburetor is blower-calibrated to be most efficient with supercharged engines. While having the primary power valves boost-referenced, and the fuel curve calibrated for optimal performance this carburetor goes even one step further. This four-barrel carburetor utilizes the ''RS'' Features, or removable sleeve, allowing racers to change their carburetor size by simply inserting the correct sleeve/venturi to fit your needs. It also gives you complete freedom on race day with the ability to tune-up your vehicles by changing the carburetor size or using the removable boosters feature to get the peak settings you desire.

Jet Performance Products
From Jet Performance Products (17491 Apex Cir., Dept. SC, Huntington Beach, CA 92647, 800/535-1161, www.jetchip.com) are modified Holley 2bbl Carbs. Metering blocks are fully modified, and the jetting power valve and accelerator circuits are calibrated for the specific application. These modifications are done to promote maximum off-the-corner torque, as well as straightaway horsepower. A 0.130 needle and seat is installed for high-rpm fuel delivery, and the float is modified to control fuel slosh during cornering and breaking. The carburetor is assembled using the highest quality components and finished with a 3/8-inch fuel inlet.

Quick Fuel Technology
Quick Fuel Technology's (2352 Russellville Rd., Dept. SC, Bowling Green, KY 42101, 270/793-0900, www.quickfueltechnology.com) Professional Series carburetors are designed for racers with a ''no compromise'' approach. Their Pro-Modular construction starts with a Proform main body that receives QFT billet metering blocks loaded with features like Quicktech calibration and stainless idle mixture screws. Attached at either end are lightweight die-cast aluminum fuel bowls with fuel chute bowl fill technology that directs incoming fuel to the bottom of the bowl towards the main jets. Bowls feature #8 fuel inlets, and the package includes #6 adapter fittings. The super-duty throttle body is filled with slabbed throttle shafts that use Torx button head screws for improved airflow and quick-change mechanical secondary. The throttle linkage plate is welded to the shaft for improved durability. At 2 1/2 pounds lighter than a conventional carburetor, the Professional Series is the discriminating choice for outstanding performance. Each carburetor is hand-assembled and engine-tested for proven performance

Proform
Proforms (P.O. Box 306, Dept. SC, Roseville, MI 48066, 586/774-2500, www.proformparts.com) Race Series Carburetors are hand-assembled in the U.S.A., utilizing the Proform high-flow carburetor main body, durable billet metering blocks, and a high-performance throttle baseplate. Each carburetor includes a high-flow main body, Dyno-proven horsepower and torque gain, adjustable screw-in air bleeds, high-performance down-leg boosters, maximum air flow, no air horn, choke tower, or choke control, and a high-rate air flow section design.

Edelbrock
From Edelbrock (2700 California St., Dept. SC, Torrance, CA 90503, 310/781-2222, www.edelbrock.com) are 800-cfm AVS carburetors with manual or electric Choke. They're designed and calibrated for optimum street performance in high-hp small- and big-block engines. The AVS carburetors match with a variety of manifolds that include Edelbrock Performer, Performer RPM, RPM Air-Gap, Torker II, and others of a similar design. All carburetors include metering jets: Primary 0.113, Secondary 0.107; Metering Rods: 0.068x0.047, and Step-Up Spring: Orange (5-inch Hg).

Holley
The Holley (1801 Russellville Rd., Dept SC, Bowling Green, KY 42102-7360, 270/782-2900, www.holley.com) Street Avenger Carburetors are designed from the ground up, 100 percent wet-flow tested, and calibrated for awesome street performance right out of the box. Every carburetor features a no trouble adjustable vacuum secondary, an on-vehicle no-trouble electric or manual choke, and an external no-trouble float adjustment with sight plugs. Every Street Avenger Carb comes factory set and flowed. You can, however, easily adjust your float level to compensate for varying fuel delivery pressure right on your vehicle without the risk of overcompensating. They also have a Generation IV no-trouble power valve with million-mile blowout protection to ensure years of reliable performance. They also use any 9 5/16-inch center-to-center fuel line designed for 4150 Series carburetors.

Classic Tube
Classic Tube (80 Rotech Dr., Dept. SC, Lancaster, NY 14086, 800/882-3711, www.classictube.com) has StopFlex hose assemblies for brake and clutch applications to eliminate the spongy pedal feel, and provide greater braking efficiency and clutch operation. The StopFlex hose incorporates a special four-layer design for superior strength, and virtually no volumetric expansion. They start with a Teflon PTFE core (liner), which is wrapped first in a Kevlar braid, followed by an elastomer barrier, and then it's strengthened further by the outer stainless steel braid. StopFlex hoses are also available with a final coat of clear vinyl for a great look and easy clean up.

Inline Tube
Inline Tube (15066 Technology Dr., Dept. SC, Shelby Township, MI 48315, 800/385-9452, www.inlinetube.com) offers stainless steel brake, fuel, and transmission lines for a variety of GM applications. All tubing products are manufactured using state-of-the-art Computer CNC benders. Their laser scanner checks each line for 100 percent accuracy, safety, and fit. Their ability to computer bend saves time and eliminates material waste so you get the highest quality parts on the market at the best price.

Allflex Technologies
Allflex (860/851-9013,www.allflexhose.com) AFX-R7 Series begins with Goodyear's Hysunite Fuel Line/Emission Control Hose because of its flexibility and design for gasohol and later-carbureted vehicle applications with high under-the-hood temperatures. The Hysunite underbraid hose cover is oil- and gasoline-resistant, and withstands exposure to fuel, vapor, moisture, and high heat up to 250 degrees. A high-strength synthetic textile reinforcement coupled with the outer braided steel brings minimum burst to 175 psi, meeting the SAE specification J30R7. Hoses are available for a wide variety of Chevrolet applications.

By Dakota Wentz
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