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09-17-2007, 11:02 PM
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#1
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Registered
Join Date: Sep 2007
Location: Long Lake ME
Posts: 17
1986 Scarab I
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Extension Boxes
I was wondering if any one has recently installed extension boxes on a single engine scarab? I currently have a single engine 21 scarab I with 540hp running a bravo one. I have the motor and the boat where I want them, but I think I can tweak some more power with the outdrive setup. I currently run a 27p 3 blade prop. With this setup I get 84mph. But I think I could get more with a better setup. I have been looking into nose cones, extension boxes and shorter lowers, but wanted to see what everyone else has to say.
Last edited by BlownScarabI : 09-20-2007 at 10:33 PM.
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09-20-2007, 06:21 PM
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#2
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Team Dysfunctional
 Charter Member
Join Date: Jan 2001
Location: PUTNAM VALLEY, Hudson River Valley
Posts: 1,352
28 Scarab, Blown 825 Hp, 78.2 Db
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[quote= I have been looking into nose cones, extension boxes and shorter lowers, but wanted to if anyone else has to say.[/QUOTE]
Use all the above.
But 84 is would be fast enough for me in a 21' boat.
__________________
If it aint broke .... I can break it....
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09-20-2007, 10:31 PM
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#3
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Registered
Join Date: Sep 2007
Location: Long Lake ME
Posts: 17
1986 Scarab I
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Thanks, shooting for 90, any recomendations on who's product to use.
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09-21-2007, 12:05 AM
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#4
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Team Dysfunctional
Charter Member
Join Date: Jan 2001
Location: PUTNAM VALLEY, Hudson River Valley
Posts: 1,352
28 Scarab, Blown 825 Hp, 78.2 Db
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try a land a sea stern jack and lab the prop it might get you where you want with out spending a lot of $$$ and a lot of work.
I sanded some of the factory hook out of my Hull and gained some MPH.
also at those speeds you might want to look into a nose cone to make the drive more efficent.
I hope you have hydrolic steering.
__________________
If it aint broke .... I can break it....
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09-21-2007, 12:40 PM
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#5
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Registered
Join Date: Sep 2007
Location: Long Lake ME
Posts: 17
1986 Scarab I
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Thanks for the info, and yes I have a dual ram setup.
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09-21-2007, 10:34 PM
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#6
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Registered
Join Date: Jul 2006
Posts: 49
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84 mph WOW good stuff! I have a Scarab 1 as well. I am doing a 65-68 with a 383 NA stroker. Sorry I cant offer any advice on the extension thing but I would like to share ideas. 90 + would be unreal. We hit 73 with wind and current once and it was great.
Please give me some details of your boat.
I am trying to get to 75
Did you do anything to to bottom?
Does your engine hatch/ swim platform weigh 200+lbs? Mine does and I cant see why unless its a balance thing.
I would like to share some pics with you. I did some cool mods to make mine look newer.
Good luck with the 90+
Ned hdtvned@yahoo.com |
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09-22-2007, 01:07 PM
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#7
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speel chekk this fokker!
Charter Member
Join Date: Feb 2001
Location: Locust Valley, New York
Posts: 5,200
27' Scarab
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I've got a land and sea box I'd sell! PM for details.
__________________
Pardon me, while I whip this out!
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09-23-2007, 11:33 AM
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#8
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Registered
Join Date: Sep 2007
Location: Long Lake ME
Posts: 17
1986 Scarab I
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Ned, your boat sounds nice send me some picks jbeckerm5@yahoo.com, or just post some, I'll try to post a few of mine in a day or two. Heres some details, I no longer have platforms, hull is stock. I have a 400 sb with a blower dyno tuned at 540hp. I also have a bravo one, because the alfa blew up. My steering is a Mayfair dual ram set up, got to get rid of the cable system, its just dangerous at speed. Now I'm just trying to fiqure out how to get a little more mph from out drive mods. |
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10-08-2007, 06:33 PM
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#9
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Registered
Join Date: Jan 2007
Location: Victorville, CA
Posts: 114
26ft LS Scarab
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Puder Im Restoring my old 26Ls and im thinking of trying
a box, I must have your old info so send me a Email.
Mike J.
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10-08-2007, 08:38 PM
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#10
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Platinum Member
 Platinum Member
Join Date: May 2001
Location: Amherst,NY
Posts: 508
36 skater
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Scarab22, What is a racing 468 merc 502 cu?
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