Why do engine builders not use rocker arms?
In many engine builds, strict attention is not paid to rocker arms. They are not thought of as contributing to the durability, longevity, consistency, and power of a race engine. But top engine builders hold the opposite to be true or they wouldn’t be where they are.
Can a stamped rocker be used for a pushrod?
If your looking for stock replacement options for your rocker arms stamped rockers are an option and are many times available in different ratios and slot lengths so you can customize your valve lift and have the clearance needed for higher lift applications.
Why do you need rocker arms on a camshaft?
Getting the camshaft’s full lift/duration to the valves, means proper installation and setting of the rocker arms is an important facet to reaping 100% of available power. “High-stress applications demand a somewhat different rocker arm,” Elliott says.
Can a roller block use a flat tappet lifter?
The lifter bores on a LATE model roller block will accept both flat tappet and factory roller lifters- the oil feed holes to the lifters are in exactly the same location. Flat tappet lifters in a roller block will look a little funny sitting way down in their bores, but they’ll work perfectly.
Can a roller cam be used with a flat tappet?
Shove the cam in, leave off the factory retaining plate, use a standard flat tappet cam timing chain, drop the flat tappet lifters in the bores, get the right length pushrods and away you go. Roller lifter in an early block? More difficult.
How is rocker arm to valve tip alignment?
When spacing the rocker arms, the contact point of the rocker arm to the tip of the valve must be slightly off center as shown above. This goes for the use of any type of rocker arm, be it stock or aftermarket with or without swivel feet or roller tips. The purpose of the offset is to rotate the valve slightly each time it is operated.
How can pump up be not the lifters fault?
Pump up is normally not the lifters fault. Think about it, oil being fed thru an orifice into a chamber of a fixed dimension. How can that go wrong? Here is a way, the valve is heavy, the valve spring is weak, the cam lobe is aggressively actuating the valve in a manner similar to a baseball pitcher throwing a fastball.