Jock itch (tinea cruris) is a fungus, the same one that causes athlete's foot and scalp ringworm. The groin area is the perfect place for the fungi to grow and cause a fungal infection because it is moist, warm and dark.
The camshaft lift is the resultant net rise of the valve from its seat. The farther the valve rises from its seat the more airflow can be provided, which is generally more beneficial. Greater lift has some limitations.
One is lift at the cam, and the other is lift at the valve. Lift at the cam basically means that we are going to take the difference between the heel of the camâor the backside of the camâand measure it against the peak of the lobe which is the high side of the lobe. The difference between those two is going to be the lift at the cam specification.