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-   -   Y2K setup (https://www.offshoreonly.com/forums/superboat/364268-y2k-setup.html)

Iflylow57 12-17-2019 04:15 PM

Y2K setup
 
I have a 2005 Y2K that I’m upgrading the engine on. I have a whipple 525 dyno’d At 790 HP that’s going in. It already has a Bmax and I am curious if anyone has run an extension box. I have a stelling box sitting on the shelf and trying to decide if it’s worth the work putting it on. TIA

SUPERSTITIOUS 12-17-2019 08:03 PM

Can all depend on how far below the bottom of the boat your propshaft is currently. Moving the drive back further you'd typically want a higher x dimension.

OCCJoe 12-18-2019 09:40 AM

I run an 8 inch extension box on my 07 Y2K. I have a little over 800 hp and have run 107 mph with a bravo XR and a sport master lower. I just did a little upgrade and I’m pretty sure she’s got 110 in her now but we gonna let a new owner find out. I think my days of pushing the limits are done.

Iflylow57 12-20-2019 09:35 PM

Thank you for the advice. Do you think your box made a difference? I have a pair of stelling boxes and am considering using one it’s a question of if the juice is worth the squeeze. It is the older hull design from what I understand being an ‘05. Really trying to pull from y’all who have experimented already rather than reinvent the wheel. Thank y’all!

SUPERSTITIOUS 12-20-2019 10:52 PM

I ran a 525 with ITS, never had run my boat without an extension box. I like the way my boat handled as well as the clean installation of the ITS/steering Rams. I did run a higher x dimension when JC set it up at Superboat. My 2006 bottom was the same as yours not the current steps. Might consider an imco shortie if you go with the box.

Iflylow57 12-20-2019 11:25 PM

I’ve got a two inch shortie on the B max now. Y’all think the stelling might be too much box? I’m really on the fence as to which way to go

SUPERSTITIOUS 12-21-2019 04:02 PM

On your current set up with the drive parallel to the bottom how far below the bottom is the prop shaft

Iflylow57 12-21-2019 05:34 PM

I’ll have to measure I’m gone for Xmas right now. Where would you want it to be?

OCCJoe 12-22-2019 01:02 AM

My boat was built with a Konrad package that had a transmission so the hole in the transom was about that of a number 6. I modified the box to a bravo transom. I wish I had the ITS. I’m -2 and have gone down and then came back up.
https://cimg3.ibsrv.net/gimg/www.off...4cb6cac68.jpeg
https://cimg4.ibsrv.net/gimg/www.off...e0c2d4037.jpeg

Iflylow57 12-22-2019 10:29 AM

Occjoe. I read the thread on your boat. I’m jealous nice work! As far as mine goes am I to read between the lines and understand sell off my boxes and go get an ITS? Or go with “run what you brung” theory and slap the stelling on. The integrated steering arms while nice don’t close the deal for me. I don’t mind the the “current look” at all and unless I am missing something it would appear to me that the only real advantage of the ITS over other boxes is one of “ one stop shop, clean looks”

SUPERSTITIOUS 12-22-2019 11:50 AM

My prop shaft was 3 1/2” below the bottom. I tried a 1” spacer and ran 1 season and took it off. There are a lot of theories out there. You can go back to the “Y2K setup thread” I assume you have external steering already, use the box you have.

SUPERSTITIOUS 12-22-2019 12:31 PM

A video of my running attitude.

SUPERSTITIOUS 12-22-2019 01:07 PM

Page 64 of superboat forum. Y2K set ups. Not sure how to post the link

OCCJoe 12-22-2019 10:47 PM


Originally Posted by Iflylow57 (Post 4719444)
Occjoe. I read the thread on your boat. I’m jealous nice work! As far as mine goes am I to read between the lines and understand sell off my boxes and go get an ITS? Or go with “run what you brung” theory and slap the stelling on. The integrated steering arms while nice don’t close the deal for me. I don’t mind the the “current look” at all and unless I am missing something it would appear to me that the only real advantage of the ITS over other boxes is one of “ one stop shop, clean looks”

So to clarify one thing, extending drive out behind the boat does not make speed. It makes the boat handle like a bigger boat. In the end what works on one Superboat might not work on another. Hand laid boats from vintage molds that shift from one layup to the next are never gonna be the same plus there’s always the Bacardi factor to take into account.
Trial and error and always trying new things make a big difference. My boat is 13+ MPH faster then it was when I bought it with the exact same motor and HP.
I’ve got a 1350 blower motor I bought for my pantera but the idea of how fast my Y2K would go with another 550hp is kinda scary. I’m thinking 135mph range. But nah I’m good.
Good luck

SUPERSTITIOUS 12-28-2019 04:15 PM


Originally Posted by occjoe (Post 4719509)
so to clarify one thing, extending drive out behind the boat does not make speed. It makes the boat handle like a bigger boat. In the end what works on one superboat might not work on another. Hand laid boats from vintage molds that shift from one layup to the next are never gonna be the same plus there’s always the bacardi factor to take into account.
Trial and error and always trying new things make a big difference. My boat is 13+ mph faster then it was when i bought it with the exact same motor and hp.
I’ve got a 1350 blower motor i bought for my pantera but the idea of how fast my y2k would go with another 550hp is kinda scary. I’m thinking 135mph range. But nah i’m good.
Good luck

lol

Iflylow57 01-17-2020 10:36 AM

Occjoe, Bacadi factor HA! So i was under the impression that a box would help with speed due to the prop being in "cleaner water" I am most definitely still learning thank you for the clarification, aside from more stability in straight line running what are the advantages of making the boat think its longer?
Superstitious, I measured the drive last night and you will have to bare with me as some of my lingo is not up to par...
The prop shaft is 7-9/16 below the flat area behind the plug and 1-1/16 below the lowest point of the hull. Whats all yalls thoughts to high? just right? only time will tell? I read the Y2K setup thread and it looked like the group consensus was to keep it "lower" however there were not any actual measurements given so i am most certainly looking for yalls input both on the box and the prop height, Occjoe you made a very strong point about the ever-changing (all be it small changes) molds. As always thank yall for the input and help

SUPERSTITIOUS 01-24-2020 05:43 PM

To me it sounds like it’s on the high side, I am by no means an authority, just my opinion. Have you any experience running it at that height? Obviously getting out of the hole, being able to carry the bow as well as excess prop slip may be an issue. I would think a five blade without a defuser ring would work to your advantage. As Occjoe states, a lot of trial and error, sometimes with mixed results. In essence the extension box is like putting you outdrive deeper as water rises off the transom. There are lots of opinions out there you can always call John Coen at Superboat get his opinion as well. I believe John Junior and his friend are running their Y2K race boat, which I believe is the same vintage as yours, with the same bottom, no extension box with a IMCO -2 shortie. I’m sure he’d be able to give you some specifics.

T-Mone 02-13-2020 08:55 AM

very impressive numbers... 107? I set up many of the y2ks spent countless hrs on my own boat. I might need som tips :)

T-Mone 02-13-2020 08:56 AM

did you run it w no box yet??


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