Smart tab no fit- other suggestions?

[drtydeed]

Hi Folks,

New to the site. I have a bit of an issue that I'm hoping that someone can help with. I have a 2007 Stingray 210 that I get excessive bow rise until plane. And once on plane, I can only give it very minimal trim or it will porpoise badly. I tried to install a set of smart tabs (ST 1290-60) as per nauticus recommendations. However, there is no way to install them with the limited clearances due to extended hull design, and the thru hull exhaust. If I could manage to get them installed beneath the exhaust outlet, there would only be approx 6" of side clearance to the outdrive. The outer section of the hull runs back on an angle, so I can not use that area either. Attached (hopefully) is a pic with some crude measurements).



The question is, what other options do I have to get this boat to plane quicker and reduce bow rise? Should I drop pitch in the prop (currently 21P)? Should I look into a hydrofoil? Are hydrofoils ok to use with a sterndrive?

I wouldn't mind losing some top end as most of the waters I use have speed limits of 45mph (boat currently will do approx 58 mph). My last boat (16ft chaparral) had a 75 hp merc and I had a hydrofoil on it which seemed to improve it's holeshot.

 

[Stamey]

Re: Smart tab no fit- other suggestions?

Have you spoken to Nauticus about it? I would think you could offset the mounting point of the gas shock to mount them inboard, and it would still work due to the ball mounts on the end of the gas shocks. What about outboard? It looks like it's big enough, and the small bracket for the top of the gas shock should be able to mount on the curved section, but I *am* going from memory of how big the brackets are.
I know I am tickled with my Smart Tabs.

Chris

 

[drtydeed]

Re: Smart tab no fit- other suggestions?

Chris,

Yes, I spoke with them. There isn't enough clearance to mount them where I wanted (too close to the drive). I can not mount them "outboard" under the curved hull section because that part of the transom (the part where the hinge plate would install) is not straight (or parallel) to the transom. It actually angles back toward the side of the boat (from midway back) on an angle. So, installing the tabs here would cause them to run on an angle. Hard to describe, but think of the extended hull to be the opposite of most bass boats.

Figures, I would get something that smart tabs couldn't be mounted on...

Any other suggestions?

 

[drtydeed]

Re: Smart tab no fit- other suggestions?

maybe these pics will help what I'm trying to describe:

 

[Maclin]

Re: Smart tab no fit- other suggestions?

Maybe inbord of the extensions. Not ideal but would still help porpoising and planing. May not be enough room for the outdrive to turn, hard to tell. Also may not be a good spot to mount the transom mount with those thru-hull exhausts.

 

[drtydeed]

Re: Smart tab no fit- other suggestions?

Maybe inbord of the extensions. Not ideal but would still help porpoising and planing. May not be enough room for the outdrive to turn, hard to tell. Also may not be a good spot to mount the transom mount with those thru-hull exhausts.

maclin,

Inboard is where I had initially intended, but they would be within 6" of the outdrive. The top mounting brackets would be extremely close to the exhaust ports even with positioning the tab mounting brackets in the two furthest holes (stainless steel smart tabs allow for mounting the brackets closer to the back of the tab).

Hydrofoil or prop change anyone?

 

[Maclin]

Re: Smart tab no fit- other suggestions?

I recommend against hydrofoil.

Have you contacted Stingray and asked them where, had you ordered them, they would have put hydraulic tabs on that boat model?

 

[rschap1]

Re: Smart tab no fit- other suggestions?

Have you tried different prop(s) yet?
A different style or number of blades may help you as much or more than adding the tabs.
Some props create more transom rise, some bow...
I would think some experimenting with props and then possibly the planer wing added to the cavitation plate may help ya.

 

[drtydeed]

Re: Smart tab no fit- other suggestions?

Maclin,

No, I have not. That's a good idea.

can you tell me (briefly) why you wouldn't recommend a hydrofoil?

 

[Maclin]

Re: Smart tab no fit- other suggestions?

Hydrofoils in my opinion push in the wrong place, right in the middle, like pushing up a heavy item from the middle only, causes instability when the load seeks support on the edges and wants to go left or right. They can only push the drive and that can affect trimming and cornering adversely.

 

[UncleWillie]

Re: Smart tab no fit- other suggestions?

Thinking out of the box.
They do not need to be cosmetically aligned with the transom.
Can you sneak them in here with the bracket at #1 or #2.



Or you could change out the CLEVIS Mounts that the gas struts come with to BALL Mounts.
Look at the gas struts holding up the rear hatch on any SUV for an idea.
Almost any goofy angle is workable with Ball Mounts.

 

[drtydeed]

Re: Smart tab no fit- other suggestions?

rschap1,

No, I have not tried other props. That could get expensive unless I can find a loaner. I just purchased this boat used with 25 hrs on it, so I have not had much seat time in it (just about 3-4 hours). I hear so many negative views on hydrofoils so I'm a bit leary of that idea for this boat.

 

[nlain]

Re: Smart tab no fit- other suggestions?

Looking at your pic with the measurements on it, could you move B outboard just enough to bring the cylinder up near the extended area, should give plenty clearance for exhaust. I do see that you will cross a chine but that should not hurt anything. Also take your pics and email them to Nauticus, then call them and tell them you have sent pics, they will look at them and advise you what to do. They are good people and will help you figure it out.

I see Uncle Willie posted while I was working on mine, his position 2 is what I am referring to.

 

[drtydeed]

Re: Smart tab no fit- other suggestions?

Willie,

I wish I could put them there. But, the area under section 1 projects back on an angle towards the back corner at an angle away from the flat part of the transom. In order to use that area, I would have to custom fit (cut) the trim tab on an angle.

 

[drtydeed]

Re: Smart tab no fit- other suggestions?

nlain,

I did send nauticus the pics I posted here before I ordered them. maybe I can repost the pic that shows the angle on the transom.



Here is one more:

 

[nlain]

Re: Smart tab no fit- other suggestions?

nlain,

I did send nauticus the pics I posted here before I ordered them. maybe I can repost the pic that shows the angle on the transom.

View attachment 151939

Here is one more:

View attachment 151940

Give that a try, they may have run into this before, can't hurt and might help. If there is a way they will help you with this.

 

[Sea Rider]

Re: Smart tab no fit- other suggestions?

Meanwhile you decide move passengers up front middle to bow area, trim your engine right, full throttle and you are done. If doel fins works perfect on outboards, why can't they work same on inboards, both are mounted on top cav plate...

Happy Boating

 

[captain zac]

Re: Smart tab no fit- other suggestions?

I would consider mounting the tabs like Willy says but
I would use Lenco limited space tabs
You might have to use some 1/4 inch starboard as a filler between the bracket and the transom (can be fitted using a belt sander)
You might have to trim the SS bracket also but I talked with Lenco when I installed mine
and they said that it would not effect the strength only drill some new holes and add more
screws

 

[Tabman]

Re: Smart tab no fit- other suggestions?

If you did consider installing remotely controlled Trim Tabs, this is one way you could approach that type of transom:

 

[drtydeed]

Re: Smart tab no fit- other suggestions?

Tom,

In your second picture, your tabs are mounted on a flat transom (straight across from corner to corner). My transom is not straight (or flat). Below is a very crude drawing of what I've been trying to explain all along.