tunnel ram

plural tunnel rams

1. A type of high-performance intake manifold designed to straighten the pathway of fuel/air mixture, speeding the flow to the combustion chambers.

   The tunnel ram intake manifold is an example of an extended high-rise system.

   2009, David Lewis, Chevy Small-Block V-8 Interchange Manual, 2nd Edition, →ISBN, page 114

   2 more examples

   Tunnel ram manifolds have a couple of big disadvantages for street use. The first is hood clearance. The usual solution to hood clearance is a big scoop that blocks your vision to the right of you. The other problem with tunnel ram manifolds is that they provide an advantage only in a limited, high-rpm range.

   2003, Lee Klancher, Monster Garage: How to Customize Damn Near Anything, →ISBN, page 51

   The runner placement of a tunnel ram allows a nearly straight shot to the back of the valve.

   2015, David Vizard, David Vizard's Chevy Big Blocks, →ISBN, page 81