215 vs 180 plunger lift

[blackedout12V]

i have always heard the 215 and 180 p-7100 have the exact same pump cams. so why is the plunger lift different for the same timing setting for each pump. i know the groove in the 215 retards timing at a certain rack travel, but say at idle why are they different. cant seem to figure this one out. any info appreciated.

 

[Tate]

The spill port is lower in the 180 pump vs. the 215, so it takes less travel for the plunger to close it off and start injection.

 

[blackedout12V]

that makes perfect sense, i did not know the spill ports were in different locations. thank you sir..