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Building The Ultimate 750 Holley 3310
Pumping up the popular carb a la Proform
Leonard Emanuelson / autoMedia.com
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Tests have shown airflow improvements of up to 130 cfm, and horsepower increases of 25 to 50 horsepower. This is a great power-per-dollar value when you consider the reasonable price of $159-$199 (depending on where you shop). Additional parts for fine tuning such as screw-in airbleeds, jets and secondary diaphram springs are available from Quick Fuel Technologies, 2352 Russellville Road, Bowling Green, KY 42101. Phone 270 793-0900.
autoMedia.com was looking for a large (900 cfm) vacuum secondary carb for a street-driven big-block Buick. Follow along as we convert a Holley 3310 into a thoroughly modern, 870 cfm high performance fuel delivery system.
Resource
Proform Specialty Auto Parts USA, Inc., P.O. Box 306, Roseville, MI 48066, phone (810) 774-2500, fax (810) 778-7775, www.proformparts.com
Copyright autoMedia.com 2000-2009
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Building "the ultimate" 3310 required Proform's main body kit, a donor 3310 Holley carb, a secondary jet plate (3310s come with secondary metering blocks) and a couple additional non-stick gaskets.
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The Proform main body kit comes complete with a precision die-cast carb body, #72 main jets, non-stick gaskets, metering block plate and nylon fuel bowl screw gaskets. The quality of Proform's main body casting is unequalled.
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Comparing the Holley 3310 main body to the Proform body, it's easy to see where the increased airflow comes from. Note the screw-in air bleeds, down-leg venturii boosters and the super smooth airhorn area.
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The first step is to attach the Holley throttle body to the Proform main carb body with the supplied new gasket and the original six screws. Make sure the primary side of the carb is attached to the primary side of the throttle body.
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A Holley secondary metering block (not part of the Proform kit) has been installed to make secondary jetting changes possible. The donor float bowl assemblies are then screwed in place with the new non-stick gaskets.
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Finally, the primary metering block and float bowl are installed after the new #72 Proform jets have been installed. Take care that the accelerator pump arm has fully engaged the pump linkage before tightening the fuel bowl.
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