SPEEDMASTER DOWNDRAFT

Hot Rod - - Ls3 Intake Shootout! -

Ob­vi­ously, the Speedmaster downdraft had no is­sues with air­flow. Hav­ing no less than eight in­di­vid­ual throt­tle-bod­ies ready and able to feed the flow needs of each cylin­der, the in­di­vid­ual-run­ner (IR) sys­tem of­fered plenty of air­flow. The sys­tem was pol­ished to per­fec­tion and the cen­ter-pivot throt­tle assem­bly worked well. As with any IR sys­tem, the key to suc­cess is not tun­ing at WOT, but rather get­ting the eight in­di­vid­ual sys­tems to co­op­er­ate at idle and part throt­tle. Even more than some of the other pol­ished in­takes, LS en­thu­si­asts will likely want this based on looks alone. Equipped with the Speedmaster IR Downdraft sys­tem, the LS3 pro­duced 601 hp and 508 lb-ft of torque.

RPM

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