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how many HP needed

 
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da Liks
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PostPosted: Sep 06, 2010 12:27 pm    Post subject: how many HP needed Reply with quote

can anyone give an estimate on how much HP/torque the engine for a winch must have at minimum? if i could use a 70cc scooter engine/chassis and wheel that would be cheap ass hell, but that probably wont fly..
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hawkster0001
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PostPosted: Sep 06, 2010 1:41 pm    Post subject: Reply with quote

nah thats not gonna be enough, maybe 3-4 hp outa a scooter engine, form what ive heard 6.5 is the least if using a torque convertor, and 8 if running a straight to cetrifigul clutch
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flixmaster
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PostPosted: Sep 06, 2010 5:59 pm    Post subject: Reply with quote

8hp for bigger riders and deep water starts.
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da Liks
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PostPosted: Sep 06, 2010 10:50 pm    Post subject: Reply with quote

okay, thanks i'll be looking for an engine that gives out about that amount! i have a 150 HP Honda fireblade engine lying in the shed, probably not a good idea (and heavy as hell haha)!
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hawkster0001
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PostPosted: Sep 07, 2010 3:08 am    Post subject: Reply with quote

it would work... just run it at 1/2 throttle, if thats the only engine i had lying around i would use it
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da Liks
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PostPosted: Sep 07, 2010 7:02 am    Post subject: Reply with quote

half throttle?? haha that would still be insane.. but the winch would be sooo heavy and loud..
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GnarShredd
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PostPosted: Sep 07, 2010 9:27 am    Post subject: Reply with quote

I'm about 215lbs so I decided to go with an 8hp engine on mine with a torque converter. It can deep-water start me pretty easily on a wakeskate (and really easy on a wakeboard, skates have a smaller surface area, hence, harder to get on plane).

You can definitely get away with a 6.5 horse engine for deep water starts if you're in the 180lb or under range (you can be heavier if you're sliding off of a dock or land or something). I'd also recommend trying to score a torque converter. It makes starts way easier and is less stressful on the engine. One more thing, the magic number for gearing seems to be 6 to 1 (for example, if the sprocket on the engine is a 10 tooth, the one on the spool should be a 60 tooth). This is good for most of the setups i've seen and I'd recommend that ratio for a starting point.
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da Liks
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PostPosted: Sep 09, 2010 1:48 pm    Post subject: Reply with quote

got my eye on a honda 11hp engine for pretty cheap..
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GnarShredd
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PostPosted: Sep 09, 2010 4:38 pm    Post subject: Reply with quote

Rad, if it's in good condition, jump on it! 11hp might be difficult to move around but if you build a light frame/spool and slap some wheels on it, you'll be solid.
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supermanotorious
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PostPosted: Sep 10, 2010 2:27 pm    Post subject: Reply with quote

6.5 hp and a 60 to 70 tooth sprocket will do the trick, harbor freight has them on sale all the time, I personally run an 11 hp which is overkill
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kartman
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PostPosted: Sep 10, 2010 5:53 pm    Post subject: Reply with quote

supermanotorious, what is your gearing on that 11hp, and what is your spool diameter?
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supermanotorious
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PostPosted: Sep 11, 2010 5:11 am    Post subject: Reply with quote

10T TAV, 55T sprocket, 8" spool

kartman wrote:
supermanotorious, what is your gearing on that 11hp, and what is your spool diameter?

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da Liks
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PostPosted: Sep 11, 2010 7:12 am    Post subject: Reply with quote

supermanotorious wrote:
6.5 hp and a 60 to 70 tooth sprocket will do the trick, harbor freight has them on sale all the time, I personally run an 11 hp which is overkill
not from the us myself, what is harborfreight? and is 6.5 really enough to get some speed and do some kickers, deepwaterstart?
the guy that has the 11 doesnt respond so i dont have an engine yet..
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GnarShredd
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PostPosted: Sep 11, 2010 7:15 am    Post subject: Reply with quote

haha, oops, posted in the wrong thread.
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supermanotorious
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PostPosted: Sep 12, 2010 10:29 am    Post subject: Reply with quote

harbor feight is a discount tool supply store, not everything they sell is good quality so some people give them a bad rap for that, 6.5 hp is plenty esp if you can remove the governer, since you only run the engine less than a minute each time you won't damage the engine and you'll get higher rpm

da Liks wrote:
supermanotorious wrote:
6.5 hp and a 60 to 70 tooth sprocket will do the trick, harbor freight has them on sale all the time, I personally run an 11 hp which is overkill
not from the us myself, what is harborfreight? and is 6.5 really enough to get some speed and do some kickers, deepwaterstart?
the guy that has the 11 doesnt respond so i dont have an engine yet..

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Last edited by supermanotorious on Sep 12, 2010 1:33 pm; edited 1 time in total
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da Liks
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PostPosted: Sep 12, 2010 11:42 am    Post subject: Reply with quote

Ok.. i think sending an engine overseas is going to be veeerry costly, so i'll keep looking here (netherlands).
i found an enginge for about 85dollars (cheap) but it has an axle that is conical...
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da Liks
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PostPosted: Sep 18, 2010 9:54 am    Post subject: Reply with quote

i went with a 13 hp clone motor, with electrical start and oilbath clutch. new, so it was pretty expensive. it's getting delivered monday or thursday. all i'm missing now is the sprockets and chain, the frame is almost done.
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supermanotorious
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PostPosted: Sep 19, 2010 8:31 am    Post subject: Reply with quote

right on, the hardest part of building the winch is getting all the parts lol
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da Liks
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PostPosted: Sep 20, 2010 11:15 am    Post subject: Reply with quote

yeah? we started last week.. the spool is completely done, had an axle made, bought some axlebearingholderthingamajigs, sprocketpickups etc.. ordering the sprockets and chain as we speak, welding the rest of the frame wednesday evening. then fitting the motor in and we could be done in the weekend haha!
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da Liks
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PostPosted: Oct 26, 2010 12:30 pm    Post subject: Reply with quote

we ended up buying a 13hp clone for a good price.. runs cherry! now i have to adjust the governor, but how?
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supermanotorious
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PostPosted: Oct 27, 2010 10:28 am    Post subject: Reply with quote

I've followed this and it works very well

http://www.wakeboarding-winch.com/viewtopic.php?t=54&highlight=removal

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da Liks
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PostPosted: Oct 27, 2010 1:12 pm    Post subject: Reply with quote

we didnt remove it just yet, we tuned the spring to make it shorter and we put it in the outer hole. now it revs significantly higher!
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