Quote:
Originally Posted by bigunde
More schooling i see:
http://phystutor.tripod.com/stang/en...cleveland.html
Cleveland Family Cylinder Heads The Cleveland design cylinder heads are the real trick to the engine's performance. Several versions exist. Monsterous ports are found on the four barrel (4V) variety giving very high flow capacity on an all out race motor. Somewhat smaller ports on the 2V version result in increased low-end torque, perhaps better suited to today's street applications. The combustion chambers were made in closed chamber quench shape, and also in a lower compression open chamber style. Engines designed for hydraulic lifter camshafts use slotted rocker arm pedestals, for non-adjustable rockers. These slots maintain the pushrod alignment. 1971 Boss and 1972 High Output engines featured mecahnical lifter camshafts with flat pedestals for adjustable rocker arms and pushrod guide plates. These heads also have machined valve spring seats for use with mulitple coil valve springs. The high performance heads utilize single groove valve stem locks. Australian heads come in even more variety. |
that's more to do with the intake side to keep air\fuel velocity up for increased low rpm torque.