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Do Extension Boxes make a boat feel longer?

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Old 01-02-2006, 10:28 PM
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Default Re: Do Extension Boxes make a boat feel longer?

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Originally Posted by Back4More
Yep, its bolt on but the steering has to be moved.
I went 12" back with -2 lowers.
What were your results? holeshot, acceleration, handling, speed gains at mid-range and wot? Any ride diff in rough stuff?
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Old 01-02-2006, 11:08 PM
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Default Re: Do Extension Boxes make a boat feel longer?

I run 12" boxes with IMCO drives. I run the neutral position which is easiest on the drive shafts. In my opinion if you want to raise the X more than the neutral setting you need to raise the engine. I really don't know if mine make much of a difference since i made so many changes at once. They really make the business end look tougher.
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Old 01-02-2006, 11:16 PM
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Default Re: Do Extension Boxes make a boat feel longer?

I also did so much at once that the only thing noticeable was....I feel that it has more bow lift leverage.
Speed gains I cant say since I went from 525SC's to 800's.
74mph to 90mph
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Old 01-03-2006, 01:47 AM
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Default Re: Do Extension Boxes make a boat feel longer?

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Originally Posted by ExcaliburHawk40
I run 12" boxes with IMCO drives. I run the neutral position which is easiest on the drive shafts. In my opinion if you want to raise the X more than the neutral setting you need to raise the engine. I really don't know if mine make much of a difference since i made so many changes at once. They really make the business end look tougher.
Nice picture! I see that you have brackets that mount to the transon itself rather than the IMCO boxes that have the arms that stick out. To me, that would seem easier to put the brackets right over the original transom mount locations if the holes match up? Is this possible?
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Old 01-03-2006, 06:37 AM
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Default Re: Do Extension Boxes make a boat feel longer?

And what did Reggie say about the beak? Does it make the boat feel longer?
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Old 01-03-2006, 09:11 AM
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Default Re: Do Extension Boxes make a boat feel longer?

Just thought about it again....It has just a tad bit of cavitation on get up in rougher waters.
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Old 01-03-2006, 09:12 AM
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Default Re: Do Extension Boxes make a boat feel longer?

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Originally Posted by super termoli
And what did Reggie say about the beak? Does it make the boat feel longer?
No....It just makes the boat a little faster.
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Old 01-03-2006, 09:54 AM
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Default Re: Do Extension Boxes make a boat feel longer?

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Originally Posted by Harper220
Nice picture! I see that you have brackets that mount to the transon itself rather than the IMCO boxes that have the arms that stick out. To me, that would seem easier to put the brackets right over the original transom mount locations if the holes match up? Is this possible?
Sounds logical. I was installing on a blank transom so everything worked.
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Old 01-03-2006, 01:08 PM
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Default Re: Do Extension Boxes make a boat feel longer?

I used a Stellings box on my 26' cat. I can't answer the before and after question as I rigged the boat with the box originally. I do know that I was able to plane the boat with the prop actually above the bottom with no problem at all. This is something I know that I could not have done with out the box. The stellings is also adjustable so you can actually dial in the exact shaft height. Some stellings boxes have holes instead of slots. The holes will require the transom to be disassembled to adjust the x-dim. With the stots you just loosen things and then slide the box up or down. The engine does not need to move, although the mfr will recommend you raise or lower the engine for the last bit of adjustment due to driveshaft angles. I know that I never found a vibration between full up and full down.
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Old 01-03-2006, 03:03 PM
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Default Re: Do Extension Boxes make a boat feel longer?

I too would love to learn more about this
I truly feel that boxes 'SHOULD' give a cat more speed
However I am looking more for cener of gravity change to gain a more comfortable flater ride.
I seem to ride ass heavy now and would like to get the transom out of the water
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