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1.5 To 1.6 Rocker Calculator
1.5 To 1.6 Rocker Calculator. .316 x 1.6:1 =.5056 eg: Actually the gain is from the area increase.

Putting the 1.6 on both kills the low end even more and gains nothing extra up. That a cam is designed for 1.5 ratio and 1.6 ratio will throw off the geometry of how. Watch for coil bind or retainer to guide clearances.
So Basically With A Change From 1.5 To 1.6 Rockers The Most Gain You Would Get Would Be From The Lift Increase Correct ?
Rocker ratio = y ÷ x for example, if y = 1.5 in. I think you are right about this. Luckily i write everything down.
The 280 Cam Is Probably Approaching Max Lift For The Heads With 1.5 Rockers.
B billygman premium member joined oct 19, 2005 13,908 posts #3 · oct 25, 2010 You can get very substantial pushrods from folks like manton or smith bro's. Safe to say without knowing anything of the internals of this engine, the only good advice here is to replace all rockers w/ 1.5 ratio.
The Lobe Lift At Tdc Is.070”, So Valve Lift With A 1.5 Would Theoretically Be.105”.
What this does is give you better breathing. I have these heads and the same cam and i looked at 1.6 rockers, but i. Putting the 1.6 on both kills the low end even more and gains nothing extra up.
Here Is Some Info From When We Installed The Cam (Tony, 70Aarcuda Did The Smart Stuff Like Degreeing It, I Was Just The Muscle).
Actually the gain is from the area increase. If your cam has a lift of.4 inches, multiply by 1.5 to get.6 inches of actual valve. With the 1.6 rockers i would be at.522/.522 lift.
To Figure What Lift Will Be From 1.5, Divide The Lift At The Valve By 1.5.
If you have stock stamped oem rocker's ,good chance there not 1.5 but around 1.4x. The flexing of the rocker studs is the reason why stud girdles were developed. A cam with 498 lift and a 1.5 rocker = 498 lift a cam with 498 lift and a 1.6 rocker = 531 lift the difference is.033 (.498 +.033 =.531) nov 15, 2009 #4 c craigblock.
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