[Steve C.]

For interest use the Advertised Duration Numbers and the Lobe Separation Angle here:

http://www.wallaceracing.com/overlap-calc.php

( For the purpose of this exercise presume the are both rated at the same tappet lift )

Comp Thumpr:

291
311
107

87 degree overlap

Crower 60919:

304
316
112

86 degree overlap

.