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Extension Boxes, Ins And Outs

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Old 08-23-2002, 12:44 PM
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Lightbulb Extension Boxes, Ins And Outs

I WAS WONDERING IF SOMEONE COULD GIVE ME THE ADVANTAGES AND OR DISADVANTAGES OF EXTENSION BOXES MAINLY BRAVO 1, AND IS THE PRODUCT STERNJACK THE SAME THING, THANKS
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Old 08-23-2002, 01:37 PM
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Plus-improved efficency leading to greater speed with out increasing hp or decreasing reliability
Plus-the ability to raise the x-dim
Plus-the boat behaves like a larger hull
Plus-improved planing?
Plus-looks cool

Minus-full hydraulic steering is required
Minus-custom machining MAY be required
Minus-costs big $$
Minus-must fully derig the boat

The stern jack really isn't a comparable product. I believe the stern jack is limited to lower HP/speed applications that require alot of trim to run the best. The sternjack does not belong on a HP boat.
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Old 08-23-2002, 02:26 PM
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I only did a set because the motors were out and the gimbals needed to be repainted...so I didn't want to be pissed at myself for not doing them later on.
I like the way they look...alot!(notice the setup in the background)
I don't really think they did much for performance as much as the shorties did.
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Old 08-23-2002, 05:00 PM
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I have the Stellings boxes, but didn't have much seat time in my boat before they were installed so I can't really say what benefits I have gained. Before they were installed I had TRS drives with trannies and only drove the boat once with those before installing Bravo One drives and adding the extension boxes at the same time. I really like them though and they DO give the business end of the boat more of a RACEY appearance. After two years of owning the boat I have done a TON of mods to it and am still setting it up! I will be adding the 2" IMCO shorties next year as well. My propshaft centers are still too deep. She's coming to me though!
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Old 08-23-2002, 05:14 PM
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I don't know if this is any help to you or not,but I have merc's new ITS on my boat. This integrates external steering and a small extension (7" I think) into one unit. The builder raised my x-dim by about 3" with the ITS and I am really happy with it so far. I don't know if it gives me any speed gains or not, but it really cleans up the transom of the boat since the steering is integrated and I like the performance that I get with the boat.
Here's a pic...

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Old 08-23-2002, 09:12 PM
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agree with cord about following plus's

Plus-improved efficency leading to greater speed with out increasing hp or decreasing reliability
Plus-the ability to raise the x-dim
Plus-the boat behaves like a larger hull
Plus-improved planing? .....yes
Plus-looks cool ......& competitive

but!!!

Minus-full hydraulic steering is required : you need is anyway.I mean if you are running more than 80's hydraulic steering is almost a must.
(If you have slower boat dont spend any penny on extension boxes... my idea)

Minus-costs big $$ : land and sea has the easiest & cheapest kit.anyone can install in an hour.it is around 2500 usd each.And if you insist on not having a external hydraulic steering :this is the only kit.

hope this helps
by the way there was a comparison test in powerboat magazine about 12-16 months ago about extension boxes.I keep my arcieve in my office ,can send you the results if you want....
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Old 08-23-2002, 11:02 PM
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thanks for the replys, im planing on spending some money and just wanted some insight, back4more what did you pick up with the short lowers? timucin, sure if its not to much trouble id like to read it, thanks
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Old 08-23-2002, 11:26 PM
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ok np. will post them on monday
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