Strange Bumps: Andrews No. 1

I run a Sifton 412 with about 60+ overlap in a 1952 74" motor.  It comes on a bit late.  Upon further research I've calculated my gearing, compression, carb diameter and exhaust length.  This cam's specifications should improve throttle response, torque and overall performance at a lower engine rpm.  But, when I opened the box and looked at the lobes?  Huh?  That's different.  Looks like a mini version of a Leineweber with those tall ramps and flat tops. 

1 comment:

Kevin Anderson said...

That's really strange. Usually the Andrews lobes are egg-shaped.