Can a roller rocker be replaced with a contoured tip?
However, as the rocker arm ratio increases, angles get sharper, lift gets higher, and the tip has a harder time maintaining the right geometry to last as long. Replacing the contoured tip with a roller compensates for this problem at the cost of more complexity and weight.
What does the rocker arm do on a pushrod engine?
Rocker Arms. All cam-in-block pushrod engines use a rocker arm to convert the reciprocating motion of the lifter and pushrod into motion that controls the valve. In simplest terms, the rocker arm operates like a child’s teeter-totter in which the upward motion of the lifter is converted to downward motion of the valve.
What kind of rollers are in factory rockers?
Now let’s talk about the rollers in these rocker arms. Factory rocker arms usually have a fulcrum, or pivot, that’s made up of either stamped steel or a bushing of bronze or Oilite. The tips of most factory rocker arms slide slightly across the valve as they go through their motion.
What’s the difference between stock and high ratio roller rockers?
For our first set of tests with the stock head, we compared stock rocker arms with a 1:1.26 ratio to the 1:1.5 ratio roller rockers. The ratios increased the 0.295 inch of lift to 0.372 inch and 0.446 inch, respectively. The high-ratio rocker arms did well at the peaks, picking up about 5 percent more torque and power.
When to use stock Rockers in racing cars?
When using stock rockers in racing applications, or with more than 280lbs over the nose pressure, the rocker must be modified to force the oil flow from the pushrod down to the trunion so it is adequately lubricated. This information is supplied with the pushrods if you request it.
Is there a stroker kit for cylinder heads?
With the availability of our lower cost stroker kits for the Small Blocks, we are seeing more interest in Small Block build-ups and that is especially true in the cylinder head area. As you read through this article you will notice some of the words appear in orange. These are links to the product they are describing.
What kind of heads do Hughes engines use?
At Hughes Engines we have you covered in all of these areas. First we’ll look at the Magnum heads. There are 5 types of magnum heads available. 1. The standard head that was OEM on the trucks from 1992 to 2004, they are iron, casting numbers ‘466, ‘671, ‘714. 2.
Are there different types of Magnum Truck heads?
First we’ll look at the Magnum heads. There are 5 types of magnum heads available. 1. The standard head that was OEM on the trucks from 1992 to 2004, they are iron, casting numbers ‘466, ‘671, ‘714. 2. The R/T heads are an over-the-counter part from Mopar Performance, NOT an OEM head on R/T trucks as believed by wishful R/T truck owners.