Tunnel ram intake manifold for improved low RPM operation

摘要

A manifold including first and second divider bodies each having a carburetor mounting flange. The first divider body includes a first and a second plenum, and the second divider body includes a third and a fourth plenum. A first pair of runners extends from the first port flange to the first plenum; a second pair of runners extends from the first port flange to the third plenum; a third pair of runners extends from the second port flange to the second plenum; and a fourth pair of runners extends from the second port flange to the fourth plenum. Accordingly, in operation, each plenum will present only one carburetor venturi to the cylinder in a low-RPM, low-throttle opening induction event, thus keeping the peak velocity through the carburetor's venturi high even at low RPM.

主权项

1. A tunnel ram manifold, comprising:
first and second port flanges mateable to an engine; first and second converging plenums each having a carburetor mounting flange; a first pair of runners extending from the first port flange to the first converging plenum; a second pair of runners extending from the first port flange to the second converging plenum; a third pair of runners extending from the second port flange to the second converging plenum; and a fourth pair of runners extending from the second port flange to the first converging plenum; wherein each converging plenum includes an inlet opening adjacent its associated carburetor mounting flange converging to an aperture smaller than the inlet opening.