Lifters
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[[File:Pontiac service manual lifter diagram.jpg]] | [[File:Pontiac service manual lifter diagram.jpg]] | ||
====Fast bleed down lifter==== | ====Fast bleed down lifter==== | ||
| − | An example of a fast bleed down hydraulic lifter is the [http://www.rhoadslifters.com/ Rhodes] lifter. The Rhodes lifter accomplishes the fast bleed down by | + | An example of a fast bleed down hydraulic lifter is the [http://www.rhoadslifters.com/ Rhodes] lifter. The Rhodes lifter accomplishes the fast bleed down by machining a precision groove on the plunger, possibly by using EDM (electron discharge machining) or laser. This groove allows the oil to bleed out of the lifter at a faster- yet controlled- rate. This allows the lifter to lower the lift and duration of the cam at lower RPM, typically from idle to ~3000 RPM or so, depending on the valve spring pressure and oil viscosity. At higher RPM, the lifter behaves as a normal lifter would. |
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| − | Below, the groove on the plunger can be seen at the arrows. The plunger is partially removed from the lifter body; the retainer clip and pushrod cup | + | Below, the groove on the plunger can be seen at the arrows. The plunger is partially removed from the lifter body; the retainer clip and pushrod cup having been previously removed. |
[[File:Rhodes lifter groove.jpg]] | [[File:Rhodes lifter groove.jpg]] | ||
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