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.
The rocker arm is the link between the camshaft and the valves-functioning as a lever arm to multiply the cams lobe lift to the valve lift. Stock rocker arm ratios vary between manufacturers and engine types, but generally all small block Chevy's come with a 1.5:1 ratio rocker arm.or example, a popular small block chevy cam has .468 lift at the valve. Divide this number by the stock rocker ratio of 1.5 to get the lobe lift of .312. Multiply .312 by the new rocker ratio 1.6, to get the new lift of .499.