Hot Rod - - Are Carbs Still King? -

Next up on our list of sin­gle-plane in­takes was the unit from Chevro­let Per­for­mance. Like the Hol­ley sin­gle plane, the GM ver­sion fea­tured a com­mon plenum fed by eight in­di­vid­ual run­ners. Un­like a tun­nel ram, where the run­ners are all sim­i­lar lengths, the sin­gle-plane de­sign fea­tures four longer (outer) run­ners and four shorter (in­ner) run­ners. This means the run­ners are tuned to pro­duce power at dif­fer­ent en­gine speeds, with the shorter run­ners mak­ing power higher in the rev range. Run on the 415 stro­ker, Chevro­let’s sin­gle-plane in­take of­fered peak num­bers of

644 hp at 7,000 rpm and 546 lb-ft of torque at 5,200 rpm. Torque pro­duc­tion at 4,000 rpm checked in at 483 lb-ft.

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