I just got a prop from a friend and it has several grommet fittings on the drive side of the prop. Currently they are not in, but he said that you ocan insert these grommets and it changes the perofrmance.
Can anyone explain what these are for, how they help, and what is the best way to use them. If I recall, it is a 19 blade Mirage. I do have the silent choice set up for the exhaust, so when I am in performance mode, no exhaust is exiting the prop.
Any and all feedback welcome. 21' Eliminator Daycruiser, 1982, 350 smallblock @ 415 hp.