MAST SIN­GLE PLANE

Hot Rod - - Are Carbs Still King? -

The Mast in­take was an im­pres­sive unit, with two­piece con­struc­tion that al­lowed full CNC port­ing. The port­ing looked so nice that we hated to run it, but run it we did. Like the pre­vi­ous in­takes, the Mast was run with the same Hol­ley 950 Ul­tra XP car­bu­re­tor. The car­bu­re­tor was jet­ted to pro­vide the op­ti­mal air/fuel ra­tio to max­i­mize power pro­duc­tion, and we em­ployed tim­ing sweeps to do like­wise. Though we ran it in car­bu­reted from, the Mast in­take was also con­fig­ured for EFI use. We sim­ply plugged the holes with in­jec­tors and fed the com­bi­na­tion with the Hol­ley car­bu­re­tor. Run on the 415 stro­ker, the Mast in­take pro­duced peak num­bers of 650 hp at 6,700 rpm and 555 lb-ft of torque at 5,000 rpm.

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