---

gypsmjim
I did go ahead and bought a Doel Fin set.
The instructions are very vague as they don't tell you where to mount them on your anti cavitation plate.
As an engineer I wanted to know where to put these fins on the plate as the plate on the 60HP EPI 4 stroke is a lot longer than the Doel fins. No where in their mounting instruction do they give this info so I called customer service and was told to center the foils over the C/L of the prop equal to where the foil straight edge angles back to the cav.plate.
That said I did so and ended up with longer out of the hole shot with higher bow rise (engine tucked in all the way) same top WOT speed except much more prone to porpoising.
This was with 4 adults (800+lbs crew and all) the standard 3 bladed Vengeance SS prop. Yes I could plane at slightly lower speed but with two adult women on the bow cushion I felt like the bow was riding to high.
I will remove the $28 "fix" as it didn't really make it "perfect" and I didn't like the way the boat was riding or porpoising.