Quote:
|
........ looks like you've just saved me some money ........
|
Lots of people are spending money they don't need to.
Quote:
|
.......... Is the "base circle" of a cam the diameter of a lobe minus the section that causes lift? ........
|
Except for the terminology, you have it right. The cam lobe is added to the base circle (heel) and it's the part that raises the lifter.
Quote:
|
.......... If a specific cam requires an adjustable valvetrain ........
|
Solid lifters (flat tappet or roller) must have some method of adjustment. The method of choice, for these engines, is adjustable rockers.
Hydraulics (flat and roller) were designed for use in non adjustable applications. If there are any dimension changes that fall outside the design specs of the engine, they must be compensated for. For instance, if the heel diameter of an aftermarket cam is ¼” less, the pushrod would need to be ⅛” longer. In this case, one cold address two "problems" by using restricted pushrods.
Or one could choose to use adjustable rockers, but the valvetrain geometry might be upset, and longer pushrods would have to be used anyway.
Quote:
|
........ is roller tip rockers all I would need to make my valvetrain "adjustable” ........
|
Yes and no. Roller tips have nothing to do with adjustment, but since they are part of the adjustable rockers, it doesn't matter much.
Quote:
|
.......... Is it even possible to use roller lifters with a hyd. flat tappet cam?
|
In all cases, the cam is ground to use a specific lifter. They cannot be mixed.
Norm