Stellings Boxes
 

What is to be expected? any rpm change? speed change? they work in flat water? what about rough water? safe? not safe? Prop changes? they only work under higher horse power? etc etc. all info is appreciated

Re: Stellings Boxes
 

I think a lot depends on the hull. What boat are you considering these for?

Formula 353 gains 3-4 m.p.h., 382 possibly 2 m.p.h. Have not really been able to percieve handling differences between boxed/non-boxed 382's. I think it makes a little more difference in 2-4 ft seas. Probably not huge difference in prop/r.p.m. Not sure I would go through the trouble installing these. Bigger bang for the buck spending the money upgrading engine h.p. Mine were factory installed.

Re: Stellings Boxes
 

38' Scarab, bravo's,502's carb. Upgraded HP is next winters project. time and money and ive got neither,lol

Re: Stellings Boxes
 

You get more trim with them............take that any way you want. :
D:D :D

Re: Stellings Boxes
 

With high X-dim's they definetly improve the planing. With my cat, I don't even both to adjust the trim, leave it in the sweet spot and the boat planes right off with no slippage. Even with a 3 blade cleaver the the prop only slips for a moment before grabbing. My prop shaft is set to around 1" below the bottom.

Re: Stellings Boxes
 

Ummmmm .... these would have been good things to ask ... BEFORE you did all the work !?!?!? :rolleyes: :D :drink:

Re: Stellings Boxes
 

You will probably lose about 4-5 mph. :D :D :D

Re: Stellings Boxes
 

Here's the deal .... I don't think you will see any gains with the boxes until you are at 80 mph or better ??? At 60 to 70 mph the water is coming off right behind the boat ... boxes help put the props in the "cleaner" water behind the "hole"
behind the boat ..... you aint got no hole at those speeds ... so all your really doing is creating additional drag .... robbing speed ...........

Re: Stellings Boxes
 

Gonna add about 250lbs,,,, one of the Scarabini Brothers is going to stay on shore ,,,,, or your gonna slow down!! :D :D

RHC

Re: Stellings Boxes
 

I would like to thank all the locals wise azzzes for there responses. I was actually hoping to get input from guys who have experience with boxes?

Re: Stellings Boxes
 

What year scarab? The 80s thru mid 90s scarabs seemed to run VERY low X dimensions. Raising the drives should be worth 3-4mph easy.
BTW, dont forget to add full external hydraulic steering to your budget.

Re: Stellings Boxes
 

a flat transom boat pick's up more than a notched transom boat, my 35 lightning[notched transom] on picked up 2.5 mph when the boxes were added, a friends 32 active thunder [flat transom] picked up almost 4 mph, with the stelling's they have 1" raise built in, or you can raise the drives even higher on them to raise your X . your 38 should pick up 4 mph maybe 5 if you install the drives high on the boxes, and you are running some nice 4 blade props[or 5 blade]
Mark

Re: Stellings Boxes
 

Check Your E-mail

Re: Stellings Boxes
 

93 Kevlar 1.35 bravo's highest setting on the box turnin 3 blade 23 Mirage at 4900 no gain in speed, sea tested on a pancake, again not sure if these boxes come to life in flat water or not

Re: Stellings Boxes
 

Were always here when you need us. :evilb:

Re: Stellings Boxes
 

Dude .... re-read my post ... I wasn't being a smartazz , for once :rolleyes:

Re: Stellings Boxes
 

SHAG,

I'm not sure this will help you much or not, but when I bought my boat it originally came with TRS drives, but I had them removed, and modified to a Bravo One 1.5 gear set-up. When I made the switch I thought it would be a perfect time to add the Stellings extension boxes. I mounted the Stellings extension boxes as high as they could be mounted (just under the rub rail on my boat---32' Active Thunder), but because I made so many changes I cannot tell you if my hull actually benefited from the extension boxes or not truthfully. It would seem that because my hull does NOT have a notched transom that my hull WOULD bennifit from the boxes---at least I am hoping so. At this time with no nose cones the stock length drives, the propshaft center line sits about 3.5" to 4.0" below the hull. Just before I took the boat out of the water for the season about two years ago, I also had a serious hook taken out of the bottom of my hull which I picked up about 4-5mph at 4000rpm and I obviously thought that was a pretty good gain. I couldn't get a good top end reading with the hook taken out at the time because my engines weren't operating up to RPM the last time I had my boat in the water---however, they are newly/freshly rebuilt now. I have purchased some -2" IMCO shortened lowers, and will be trying them soon to see if there would be any gains or losses, etc. I am thinking that the -2" IMCO shorties with the nose cones already molded into the casting design will work with the extension boxes, and my hull not having a notched transom---but we will soon see for sure. By the way, I've been running a labbed 32" Bravo One 4-bladed prop.

Every hull is different and I obviously have a lot of mods going on with my set-up---perhaps too much info for what you need, but perhaps it will help you out a bit or give you something to think about.

Re: Stellings Boxes
 

The first thing that needs to be resolved is ... why the 800 RPM loss ???

Re: Stellings Boxes
 

Probably not high enough. I know a couple older flat deck boats that raised their drives 1 1/2" - 2" without boxes and gained a few mph.
Are you having any ventilation or blowout problems with the current drive height? Do you have good trim control? Does the hull porpoise w/o the use of tabs?
Gary

Re: Stellings Boxes
 

I have experience with "boxes" :evilb:


so exactly what is it you want to know?? :drink:

Re: Stellings Boxes
 

What's up Tony, are you guys coming to the run tomorrow?

Re: Stellings Boxes
 

no, wish I could...Im being a boat whore this weekend and leavin mine on the trailer........keeps more $$ in my pocket for the bar :drink: :drink: :drink:

Re: Stellings Boxes
 

Took a ride last night........46-47 max................bernie couldn't push the throttles any farther down.............

Lake was very flat..........

Are the boxes dragging the boat down?????????????

Just wondering....

I know someone has the answer, it's just not me.

see ya tomorrow

Re: Stellings Boxes
 

Boxes will put your props deeper in the water ... if you don't raise the X ... you will go slower

Boxes give you more leverage to hold the bow up while running less trim ... less trim will push the boat more straight ahead instead of more trim digging down to push the bow up.

Something like that :cool:

Re: Stellings Boxes
 

box.......................you said box! thats funny! :D :D :D

Re: Stellings Boxes
 

The Stellings have a inch of rise built into the box to account for the transom and running angle.

Re: Stellings Boxes
 

I have not been able to put a lot of time on my boat yet, but the first two trips out i could tell a big difference. I went from trs to Stellings boxes with Imco Extreme Shorties. The boat is a lot more responsive to trim and planes very well for having and 18" X Dimension. My shafts are 4 inches below the bottom and my boat is one of the few Hawk 40's with a notched transom. They also look a lot better than puny standard transom assemblies.

Re: Stellings Boxes
 

Where is your sea water pick ups?
Can you still use the factory bravo pick ups?

Re: Stellings Boxes
 

When I looked at puting them on mine a couple of years ago I was told thats not enough, should still raise another 2 inches for ideal X especialy on a boat without a notch. Simptoms sound like he's draging the drives too low.

Re: Stellings Boxes
 

Yes, you can still use the Bravo pickup. You can use through prop exhaust, but a custom extension will need be fabricated to connect the Y pipe the transom assembly.


The inch of rise will get you back to the original x-dim. The box allows the x to be raised even further from there.