Quote:
Originally Posted by Jim Brierley
Use larger than 1" lifters. 1" may be OK on a stock cam but not for a performance cam. Most adjustables today are larger than some used several years ago.
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Larger that 1 inch lifters won't hurt anything on a modern performance cam but they are NOT needed. The so called "double lock" ones are 1 inch and while they are slower to set, they will NEVER come loose.
The reason OEM cams require larger than 1 inch face lifters is they are of the 3 arc design and the lift curve has NO clearance ramps. The velocity is high at the nose also. This is why the nose wears off prematurely.