#### Conveyor Speed & Cars Per Hour

28 feet per minute (or 28 feet per car). This equals a total of 1680 feet per hour for your conveyor to wash 60 cars per hour. Efficient Roller Spacing. Now assume the conveyor has 7'-4" roller spacing. The average vehicle requires 20 feet. With 7'4" roller spacing we can load a vehicle every 22 feet (or every third roller at 7'4"--3 x 7'4 ...