Quote:
Originally Posted by duke455
Sorry I must be a little confused..are the first two numbers the lobe lift ?
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First two, 4017 and 4024, are grind numbers from the master catalog.
Both have .420" lobe lift.
4017
.020" 296-5° advertised/rated duration
.050" 260°
.200" 177°
4024
.020" 304-5° advertised/rated duration
.050" 268°
.200" 184°
These Hi-Tech 420's are on page 76 in this link
https://www.compcams.com/lobe-catalog
Clay