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.
1 Beware of a camshaft with too much valve lift, too much duration, and/or too little love separation (LCA). 2  Any of these three items could cause interference between the valves and pistons. 3  On some engines, interference between valve guides and valve spring retainers can also be an issue with too much lift.