The Truth About Valve
Valve springs are one of the most critical and most overlooked components in
your engine. Proper selection of the valve spring begins with identifying the
application and selecting all of the valve train components to achieve the
engine builders’ goals.
The spring is selected to complement the system and must be matched with the
entire valve train in order for the engine to reach its full potential. It does
absolutely no good to install a cam that will rpm to 8000 if you do not have the
correct springs. Improper selection of the wrong valve spring is one of the most
common causes of engine failure. Other common causes are the incorrect
installation and improper handling of the valve springs.
Selecting a Spring
1. Use only the valve
springs that will give the correct spring pressure with the valve both on
the seat and at maximum lift.
2. The outside diameter of
the recommended valve spring may require that the spring pocket of the head
be machined to a bigger size.
3. One of the easiest and
sometimes most costly mistakes made in racing engines is not positively
locating the spring. A valve spring that “dances” around on the cylinder
head or retainer causes harmful harmonics and excessive wear. A spring that
is forced onto a retainer is likely to fail at that coil. That is why we
have such a large selection of