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Any EXPERTS on "X" dim.+ boxes?
Lookin for help from someone with thorough knowledge of rigging. I have a 38 scarab and adding SSM#3 with 12" setback extension boxes.
I would like advice on how low the bullet is below the running surface for twin staggard motors 800's. There is no notch or step. year is 1978 with blueprinted bottom. Anyone running something similiar with good results?? Thanks for any input! |
What year is your boat? Does it have a stepped hull or a notched transom?
"Cord" and/or some other guys might be able to comment on this...sit tight. :) |
damn that boat is a tank!!!!!
they biult them heavy back then, but with big power and ssm drives she'll ride like a cadillac, might not be eth fastest but when the water gets snotty thats the ride i'd wanna be in. |
Anybody out there to give some proffessional advice on this subject.
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post anothe thred on "38' scarab setup" try generl discussion maybe you'll get mor einfo if peopeo aren;t respodning to this one.
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I set up an 81 38 Scarab a few years ago. Staggered w/ TRS. A lot is going to depend on the weight distribution. I was able to increase the X dimension by over 2 inches by moving some weight around. That gave me al least 5-6 mph and a much nicer ride. Is it a flat deck or raised deck 377? Does it have a full cabin? Are you running the belly tank or did you add saddle tanks?
Gary |
377 scarab
Gary, Thanks for the response. This is a 1978 377 serial#1 of the raised deck with cabin and belly tank. boat needs alot of trim and QIV hydromotive props on trs, but has a great solid ride through any water. bottom has been straightened.
Seeing how new setup of #3 drives extened out further than a trs and then adding boxes. I am curious to how high the drives and motors need to be. Thanks. |
First off, add saddle tanks. The boat rides like a pig on roller skates with the belly tank even half full. Moving the weight back will allow a higher X dimension, higher speeds, and a much better ride. 2 standard 50 gal tanks will fit easily on either side of the motors.
BTW, this and lightening the cabin also completely eliminated the bow rise when getting on plane, allowed the boat to plane at lower speeds, and virtually eliminated the need for tabs. I set mine up for TRS, but there's another 377 w/o boxes and a relatively high X dimension that I know of. I can check to see what height he's running. There is also a standard "formula" for the amount of rise vs. setback that box manufacturers reccomend. I think Stellings had the rise built into the box. Clearace for the motors to the deck shouldn't be a problem in the staggered setup. They're pretty deep in there anyway. Gary |
I'd love to help, but I'm neither familiar with the application, or the #3. Sorry, but I'm not gonna' bs you.
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First I've heard of adding saddle tanks outboard of the motors.
I like that idea... |
Originally Posted by Gary Anderson
(Post 493761)
I set up an 81 38 Scarab a few years ago. Staggered w/ TRS. A lot is going to depend on the weight distribution. I was able to increase the X dimension by over 2 inches by moving some weight around. That gave me al least 5-6 mph and a much nicer ride. Is it a flat deck or raised deck 377? Does it have a full cabin? Are you running the belly tank or did you add saddle tanks?
Gary |
Originally Posted by Gary Anderson
(Post 493829)
First off, add saddle tanks. The boat rides like a pig on roller skates with the belly tank even half full. Moving the weight back will allow a higher X dimension, higher speeds, and a much better ride. 2 standard 50 gal tanks will fit easily on either side of the motors.
BTW, this and lightening the cabin also completely eliminated the bow rise when getting on plane, allowed the boat to plane at lower speeds, and virtually eliminated the need for tabs. I set mine up for TRS, but there's another 377 w/o boxes and a relatively high X dimension that I know of. I can check to see what height he's running. There is also a standard "formula" for the amount of rise vs. setback that box manufacturers reccomend. I think Stellings had the rise built into the box. Clearace for the motors to the deck shouldn't be a problem in the staggered setup. They're pretty deep in there anyway. Gary |
I'd definately post in the scarab section and even perhaps a boat manufacturer who's been around for a while who would take the time to help you out. That's definately something you don't wanna screw up. Just out of curiosity how far below are they currently. I bet if you call the Saber brothers they will steer you in the right direction if you don't get the help you need here. |
Thread is from 2003
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The saddle tanks make sense for the extra weight in effort to raise as much as possible without the concern of prop blow out. Can always experiment with the weight very easy also. My 12 meter was converted from trs to ssm3's without ext boxes and are about 3" below bottom. But completely different animal. Very little weight in the cabin. |
Originally Posted by F-2 Speedy
(Post 4676445)
Thread is from 2003
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Originally Posted by getrdunn
(Post 4676444)
I'd definately post in the scarab section and even perhaps a boat manufacturer who's been around for a while who would take the time to help you out. That's definately something you don't wanna screw up. Just out of curiosity how far below are they currently. I bet if you call the Saber brothers they will steer you in the right direction if you don't get the help you need here. |
Originally Posted by 14 apache
(Post 4676433)
How does lightening the cabin and adding weight to the rear Eliminate bow lift when you plane off? That's backwards. Put weight on the bow will keep the nose down. |
Originally Posted by 78tahiti
(Post 4676542)
Any help would be appreciated. Who are the saber brothers and how would I go about contacting them? Thank you for responding
www.saberboats.com Located in Grand Rapids. They're great guys. Tell them John Read recommended to call. I owned there first 28' that is still on the water currently owned by another OSO member. I lived just a couple miles from their original shop on Alpine ave. |
Originally Posted by getrdunn
(Post 4676635)
www.saberboats.com Located in Grand Rapids. They're great guys. Tell them John Read recommended to call. I owned there first 28' that is still on the water currently owned by another OSO member. I lived just a couple miles from their original shop on Alpine ave. |
What extension boxes? Stellings?
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