Thread: Chevy Rocker Arm Ratio's

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Can any one in plane english explane Rocker Ratio's ? What componets do these ratio's belong to?



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b2zone

Think of a rocker arm as a teeter-totter on your playground. If the length of the board is the same on each side of the pivot, the ratio is 1:1.

Now you are the pushrod at one end and your friend is the valve at the other end. You move up 1 foot, your friend valve moves down one foot if the ratio is 1:1.

Now, you shorten the board so that when you move up one foot, your friend valve moves down 1 1/2 feet.....the ratio is 1.5 to 1.

Dont ask about your friend valve being overweight.

1.5 raitio is the stock raitio, 1.6 rockers will make your cam a little hotter.

Originally posted by robot
Think of a rocker arm as a teeter-totter on your playground. If the length of the board is the same on each side of the pivot, the ratio is 1:1.

Now you are the pushrod at one end and your friend is the valve at the other end. You move up 1 foot, your friend valve moves down one foot if the ratio is 1:1.

Now, you shorten the board so that when you move up one foot, your friend valve moves down 1 1/2 feet.....the ratio is 1.5 to 1.

Dont ask about your friend valve being overweight.

Excellent explanation, robot