wake plate

Go for it. Luckily you don't have the hard padded keel to contend with.

Pretty much standard equipment for American Skier tournament boats throughout their history. I never could get any real information out of Ron Tanis about the plate though...
1980 "18' skier" model, I believe their first?


The Advance got a vertical fin. I would guess more for tracking & turning than bouncing/wake shape.


backfoot100's boat (same design as above)


jbear's Volante hull with molded platform and "plate" but notice the lack of fin (probably not worth the effort of adding it later). I can tell you there is no bouncing whatsoever even up to 47mph.


The only draw back to the AS hull bottom mount is lack of adjustability like the Sanger, MasterCraft and Malibu "barefoot" plates have. Luckily for those hulls though they are flat at the keel/transom.

So, you have more like an American Skier hull than the others but without the molded pocket for a bottom mounted plate. I would build one like the AS and attach it to the transom. Do your homework and add a tiny bit of downward angle (hook) to it and go from there. Wouldn't be too hard to remove it and fab a new one at different angle later if desired.

(I made sure to copy this text before clicking submit)

Have you tried getting some weight way up forward in the bow?? Wondering if that would create a similar effect as a wake plate re: the hop??
The Malibu plate looks like it's mounted to a "wedge":bracket
The MC plate appears to be simplest to duplicate though maybe not as stout as the others.

A lefty with a tower, shame on you, lol

Called a "cavitation" plate downunder.. the inboard racing boats have a foot petal on the fly adjustable setup. Almost all of the flat bottom aussie built ski boats have a turnbuckle type setup like the Sanger.

Probably much easier than to having to incorporate hook into the hull. Out of the mold every hull can be a little different. Thus it can provide a adjustment to correct the variations.

Just thinking out loud here John but I really don't think one of these will do you a bit of good to fix your porpoising symptoms.. The "Scarpa Plate" as it was called was installed to change the wake characteristics for barefooting. It had little if any effect on the overall wake shape but it did help define and smooth out the wake table to make barefoot wake crosses much nicer. At least to the best of my recollection.

You had that boat set up specifically to run in salt which it does admirably and all your water sports activities have consisted of relatively low speed running. Now you and Cam are expanding your skiing horizons which are requiring more speed. When JBear and I came to ski with you I thought it was porpoising abnormally bad at barefoot speed but we also had marginal water which didn't help either.

Gen II CC's have been run at well over 50MPH without the porpoising like you're getting at 41 and 42 MPH so something way more has changed then the weight of a tower and LH motor to cause it. Your issue has more to do with the overall hull shape and the distributed weight within that hull. Is it possible the shape of the hull shape may have changed when the floor and stringer system was worked on?
You put in a completely composite floor so how much does that weigh compared to a factory floor? Also is that a the factory gas tank or is it bigger? It would be really interesting to see what happens when you distribute weight fore or aft on the boat and with a full tank of gas vs. almost empty. If that experiment changes the drivability enough then we can help to determine the fix.
It might be something as easy as putting a couple of fat sacks under the bow or waiting to do your barefooting when you're under a half tank of gas or both.

Hi Eddie, bow weight will help some. The decks may be a bit lighter than stock and there is no foam in the boat. The tank is factory 20 gallon. With two people and any fuel load I can get her to run flat up to about 45 if I do it gradually. Stomp on it and it bounces hard. In fact on the first run ever, without tower or interior it was bad. Put anybody in the back seat and its ugly over 35. This thing was beat to death when I got it. Bare, empty boat with the grid as rotten a corn cob so yeah, the hull may be out of shape.
But there is no fixing that as far as I can see from where I'm sitting.
I converted the battery box to a beer cooler and put the battery way under the bow. I am going to add a second battery in there and that may help some but its only about 50 lbs.
You drove it and know as well as I that I have about 15 mph of boat speed that I cant use. Hell you cant even hang onto the boom at 42.
To quote Winston Churchill: "Well hell boys, we gotta do something!" or maybe that was Patton..?

John is right, as far as I can tell, the barefoot plate seems like it works in 2 ways:
1. Knocks down the prop wash a bit, changing the shape of the rooster (and thus, the table and wake shape).
2. Effectively adds a little hook to the hull (note all of Hw's references to installing at a slight down angle), effectively pushing the nose of the boat down. This spreads the weight of the boat over a larger surface, and makes the wake a bit smaller.

It is pretty common to hear that adding a "barefoot plate" slows a boat down incrementally, and that is due to reason #2 above. It would be unlikely to scrub any speed if installed flush.

I agree that a plate of this sort will likely help the bad behavior at moderate speeds. The boat isn't grossly overpowered, but do be careful about forcing the nose down too much when running upper 40's or better, it could lead to unpredictable behavior.

Agreed that something is amiss with the hull shape and/or weight distribution (engine placement?) as that hull is not known to porpoise at lower speeds (30's and low 40's), at least without a large aft load. I will disagree that the 2nd gen hull isn't known for bouncing at *any* speed, as it seems that varies a bit from hull to hull. I haven't seen one porpoise at anything less than upper 40's, but some will do so at WOT (Jackie Deens 75 is one such boat, it runs 51+ bone stock). Others are notorious nose-planters, like Alan's former (now the monohans) '81. Even a full load in back, which induces a mild porpoise in the upper 40's, is settled down to a steady ride as the nose plants above 50.