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.
Lobe Centerline â The highest lift point of a cam lobe, expressed in crankshaft degrees. For a symmetric lobe, the centerline is the average of the opening and closing angles. A symmetric cam with timing 25-65-65-25 has intake and exhaust centers of (65+180-25)/2 = 110 ATDC and 110 BTDC, respectively.