We often read and hear about “adjusting” rocker arms for more performance. How is it done and what actually is accomplished by adjusting rockers? A quick description of the valve train will help clarify the operation. Read more

Note: This article has been published several times in various forms. This slightly revised version is for those that have not seen previous versions. This article is oriented towards drag racing. However, it is generally applicable to all cars.

FRICTION MATERIALS:

Asbestos, the cause of many health problems around the world, is also the cause of many of our brake problems. The health risk from asbestos in brake friction materials has spurred the development of replacement materials. Unfortunately, although some of the new materials are superior in many ways, none of them provide equal friction coefficient as asbestos at the same application pressure. Therein lies our problem. Read more

The Q-Jet intake manifolds from 1967 to 1972 are functionally equivalent (except for type of chokes) and will bolt up to any 1965 and up heads and front cover. The 1973/74 manifolds are similar in function (and will bolt up) but have the EGR provision which requires a matching push rod cover (1973 to 1979). The 1975 and later Q-Jet manifolds have the EGR, restricted secondary openings, and poorer overall design. Read more

The harmonic balancer is installed on the front of the crankshaft primarily to dampen the torsional vibrations of the crankshaft that is caused by the power pulses of each cylinder/rod. The secondary purposes of the balancer are to provide an ignition timing mark as well as a mounting point for the various drive pulleys. Read more