Why are roller rockers better?
Why are roller rockers better?
A more obvious benefit of installing roller rockers is that of reduced friction and wear. This creates friction and wears the stem and guide. A roller rocker has a small roller that rolls over the end of the valve stem. This virtually eliminates side load on the stem and greatly reduces wear.
Can you put roller rockers on an OE head?
Either way, fitting roller rockers to an OE head generally calls for the mounting pedestals to be machined flat and to the right height to get your rocker geometry right. Of course, aftermarket heads come ready for rollers.
How are roller rockers mounted on a car?
There are two basic ways in which roller rockers can be mounted. The oldest had individual studs while newer types pivot on rigid shafts. Either way, fitting roller rockers to an OE head generally calls for the mounting pedestals to be machined flat and to the right height to get your rocker geometry right.
How are roller rockers different from normal rockers?
In most traditional V8s it’s a rocker, which is like a seesaw that’s pushed up at one end by the cam-driven push rod so that it pushes down on the valve at the other. A roller rocker is different to a normal rocker because it has a roller that comes in contact with the end of the valve stem rather than a plain metal tip.
Why are roller rockers made of pressed steel?
As we mentioned, the normal rocker tip is made of pressed steel and as the rocker depresses the valve, this tip moves in a small arc causing it to slide across the end of the valve. This pushes and pulls the valve stem from side to side and causes uneven wear or ‘bell mouthing’ in the ends of the guide.
Can a roller camshaft be used with roller rockers?
In other words, an engine can feature a roller camshaft combined with ball friction rollers, or with roller rockers. Or, an engine might feature roller rockers but not a roller cam. The two don’t necessarily need to be used together.
What are the different types of roller rockers?
Depending on the level of durability (street vs. exotic race applications), full-roller rockers can range from affordable to extreme. Roller rockers are also available in different materials and forms of construction, ranging from cast and powdered metal, to forged or billet steel, to forged or billet aluminum.
What’s the best way to keep roller cam from moving?
To keep the roller cam from moving too much, you need to use a cam button between the cam cover and the cam gear to hold it in place, and a Torrington bearing behind the cam gear to keep the cam gear from damaging the block.
What kind of roller lifter do I need for a small block Chevy?
These are retro-fit tie-bar style hydraulic roller lifters that enjoy a good reputation for quality. This would be the best approach for upgrading to a hydraulic roller cam in an older two-piece rear main seal small-block Chevy. However, there will be other changes you will have to make.
