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Rocker Arms Setup
This configuration minimizes tip travel across the valve stem and keeps contact centered on top of the valve, reducing frictional losses due to valve guide side loading and tip scrubbing. Pushrod deflection is also minimized for more accurate valve action.
Rocker Ratio
Rocker arm ratio is determined by dividing the distance from the fulcrum to the tip centerpoints (Y) by the distance from the fulcrum to the pushrod seat centerpoints (X). This theoretical ratio may vary from our net/ advertised ratio due to measured valve train deflection under load.
Long Arm
This configuration minimizes tip travel across the valve stem and keeps contact centered on top of the valve, reducing frictional losses due to valve guide side loading and tip scrubbing. Pushrod deflection is also minimized for more accurate valve action.
Tip Travel
When the valve is closed tip contact is slightly behind the centerline of the valve.
At highest unit loading (approx. 1/2 lift) tip contact ideally is on the centerline of the valve. The valve train is overcoming spring pressure and, more importantly, rapidly accelerating its mass. To minimize deflection, side loading and frictional loss, we want the valve train geometry in its strongest and straightest configuration at this point.
When the valve is fully open, tip contact is slightly behind the centerline of the valve. The valve train in this position (at high RPM) feels the least amount of unit loading as float approaches...everything gets momentarily weightless.
For technical support call 619-661-6477 or visit www.crower.com
Please note:
Crower current design 5/8 shaft Stainless Steel & Steel Billet Rockers are rebuildable. We no longer have components to rebuild our 11/16 shaft rockers.
Aluminum rockers are not rebuildable.