ryf
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« on: January 20, 2008, 10:59:49 AM » |
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so I'm throwing this out as a theory for non class racers looking to blow a wad and try something nuts...
my 820 trans has 3/4" input that means I can fit a comet mag44 driven unit on there. the benefit of a torque converter is the variable trans range (like a automatically adjusting hydrostatic trans) based on load and RPM....
that tied to a 6 speed 820, I'd open alot of low end and top end, plus I could get rid of the clutch altogether.
any thoughts?
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mtd
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« Reply #1 on: January 20, 2008, 03:03:04 PM » |
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Sounds good.And 820s are very strong trannys so it will hold up great.So go for it and let us know how it goes.
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speeddemon0308
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« Reply #2 on: January 20, 2008, 03:57:45 PM » |
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what happens when it gets wet?
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ryf
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« Reply #3 on: January 20, 2008, 04:11:00 PM » |
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they use them on snowmobiles, and polaris ATV's, I assume not much, and a little RPMS will make the belt expand, slip will create heat, and it will be dry... probably no worse than my single beltdrive transaxle.
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speeddemon0308
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« Reply #4 on: January 20, 2008, 04:41:17 PM » |
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my buddy has a sled.. and his hood broke off he kept goin threw the ditch and picked it up on his way home.. and he said there was snow gettin on the clutch and it was slipping ALOT and he was bearly moving...
and the 4-wheelers.. there a sealed unit..
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mtd
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« Reply #5 on: January 20, 2008, 04:49:11 PM » |
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That is true.I have many sleds and if you go through any amount of water or snow they slip.But you could run tractor belt to a jackshaft and run a snowmobile belt from there to the trans and enclose it.
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ryf
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« Reply #6 on: January 20, 2008, 05:14:41 PM » |
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say man. I've seen them on hundreds of mud carts, not many people complain, I'm sure like anything that isn't chain drive, it CAN slip.. but with a gearbox to keep the load in the power band, it "should" be better that a single speed anything.. I won't doubt it could slip, and it questions my thoughts about spending $500 on it... I probably won't be able to try it for YEARS... but that doesnt mean I shouldn't throw it out there for others!
I'm thinking it has alot to do with how fresh the belt is, and if it's been kept snug, all of the ones I've seen require having it adjusted from time to time.
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speeddemon0308
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« Reply #7 on: January 20, 2008, 05:27:26 PM » |
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im not sure how well it would work with it upside down. ( or flipped 90* )
Posted on: January 20, 2008, 05:16:52 PM
heres another idea.. this is a buddy of mine.. this is one of his machines be built..
a buddy of mine ran i THINK 1:1 to a jackshaft and he had 2 cent. clutchs on it.. one enguages at 1700 RPM and the other at say... 3500 or so RPM
the one with the lower RPM engaugement went to say a 100T rear sproket that is mounted on a one way bearing.. and then that got him up to speed really fast.. and then when his motor hit 3500RPM ( or what ever it would engague at.. ) it locked up and then he would have pretty much a second gear.. and the one way bearing would alow the 100T sproket to free wheel on the axel!!!
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mtd
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« Reply #8 on: January 20, 2008, 07:43:57 PM » |
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As long as you dont mind buying a few belts it should be fine.Because it shouldnt slip to the point where it dont move.One has never done that to me.Yes they get wet and you burn up belts but oh well.It is probly worth it.But yes being flat like that I dont know how it would work.It should cuz the uk guys in racing do it so you should be fine.
Posted on: January 20, 2008, 08:52:23 PM
I got a few secondary clutches laying around.If I can get my hands on an 820 I will try it and let you know how it works.
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Chris
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« Reply #9 on: January 21, 2008, 07:08:25 AM » |
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I'll agree on the slipping issue. My golf cart has one of those snowmobile drive/driven clutch getups and I freaking hate it more than anything. As soon as it gets the slightest bit wet it'll start to slip and the motor will rev up to no end. It'll eventually dry out the belt (providing it was a small splash) by burning the crap outta it and take off. I tried to forge about 4" of water once and got stuck right in the middle becuase it was enough to get the belt wet, and keep it wet. It took me about 20 minutes, and some random guy that stopped to help to pull it out.
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Just because you move up in a class doesn't mean that you'll "loose" the "race", it just means that you're building a better, more capable machine. |
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AcreFarm
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« Reply #10 on: January 21, 2008, 07:47:44 PM » |
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It'll eventually dry out the belt (providing it was a small splash) by burning the crap outta it Very true, and once it gets hot the belt will glaze over in no time. I believe off-road karts with this setup do well because the belt is fairly high off the ground, and (in most cases) covered relatively well. However if it's on the underside of the mower it's going to be subjected to every drop of mud & water you run thru. I think the idea has potential, and would be great if you could keep it sealed, or for a mowchine that doesn't see water. |
-Dan
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« Reply #11 on: February 25, 2008, 08:21:46 PM » |
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I had and offroad go cart that had that setup on. When it got wet it would not stop altogether but it would go so slow even if i reved it to no end. Now my atv (polaris sportsman 500) has the same setup except it is made for more horse power and I can fly through the water and it never slipps. The difference is that the atv is sealed. I dont no if this is true in all parts of the country but about 30-45 minutes from me there is a scrap yard with about 10,000 vehicles. They also have alot of mowers and atvs and dirtbike. Why couldnt you run a clutch off a dirtbike. I dont no much about dirtbikes but there stuff is cheap so it might be worth the effort to try. I just no chains are better. Just my 2cents.
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A word to the wise..... wait, why should I give a word to the wise. It is the stupid ones that need help.
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Chris
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« Reply #12 on: February 26, 2008, 06:32:20 AM » |
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Who's the chic in your avatar?
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Just because you move up in a class doesn't mean that you'll "loose" the "race", it just means that you're building a better, more capable machine. |
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speeddemon0308
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« Reply #13 on: February 26, 2008, 07:00:32 AM » |
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my friend took an old dirt bike engine.. and took the gear case and what not off and hoked it up to his machine..
my nabour has a 400 trail blazer with the same clutch set up.. I'm not ti sure if its a bent because those boxes are vented were the clutches are... i thinkin it may be a chain?
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mtd
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« Reply #14 on: February 26, 2008, 07:09:31 AM » |
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if it is vented it is most likely chain...
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Off Roader
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« Reply #15 on: February 26, 2008, 08:22:52 AM » |
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It was just an idea. Like i said though i dont no much about dirt bikes. Might try it though. Chick in the pic, yea i spent a month in panama with her. Nice girl, hot girl, but definatly had only one thing on her mind all the time, didnt matter who with.  Back on topic though, on a dirt bike tranny would it be possible to put a pully on the input shaft to run from the motor. Or better yet run a chain. Then run a chain from the output to my rear axle. Then hook up the clutch cable to a pedal. You would also have the gearing of a dirtbike.does anyone see what i mean here. Give me some feed back please. |
A word to the wise..... wait, why should I give a word to the wise. It is the stupid ones that need help.
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Chris
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« Reply #16 on: February 26, 2008, 08:28:59 AM » |
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Chick in the pic, yea i spent a month in panama with her. Nice girl, hot girl, but definatly had only one thing on her mind all the time, didnt matter who with.  On the dirtbike clutch, sounds like a bit of over-engineering IMO |
Just because you move up in a class doesn't mean that you'll "loose" the "race", it just means that you're building a better, more capable machine. |
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Off Roader
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« Reply #17 on: February 26, 2008, 08:57:24 AM » |
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A word to the wise..... wait, why should I give a word to the wise. It is the stupid ones that need help.
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speeddemon0308
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« Reply #18 on: February 26, 2008, 09:00:44 AM » |
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well.. i think it would be a horizontal shact that conects the crank to the gear box.. SO run a chain from the engine to a 90* box and the a chain from that to the gear box.. then from the gear box to the rear axel...
if i had a old dirt bike engine id do it up!!
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Chris
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« Reply #19 on: February 26, 2008, 09:01:21 AM » |
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I honestly don't know where I'd begin with that type of setup. You do realize that dirtbike transmissions and clutches are "wet" systems, correct?
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Just because you move up in a class doesn't mean that you'll "loose" the "race", it just means that you're building a better, more capable machine. |
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Off Roader
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« Reply #20 on: February 26, 2008, 09:05:04 AM » |
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Wet system? whats that. Yea that was my general idea phil. See i am hopefully goin to the scrap yard soon and im gona see if i can get a cheap tranny. If i waste 15 bucks yea well.
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A word to the wise..... wait, why should I give a word to the wise. It is the stupid ones that need help.
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Chris
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« Reply #21 on: February 26, 2008, 09:09:37 AM » |
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Cutch & gears reside in either tranny fluid or motor oil from the engine
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Just because you move up in a class doesn't mean that you'll "loose" the "race", it just means that you're building a better, more capable machine. |
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Off Roader
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« Reply #22 on: February 26, 2008, 10:20:47 AM » |
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well is there a way to keep the fluid contained or is it an open side where the motor should be.
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A word to the wise..... wait, why should I give a word to the wise. It is the stupid ones that need help.
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speeddemon0308
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« Reply #23 on: February 26, 2008, 11:02:08 AM » |
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dont need to worry if your running a gear box from a 2 stoke;)
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Chris
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« Reply #24 on: February 26, 2008, 11:05:47 AM » |
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yeah you do, those have transmission fluid in them
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Just because you move up in a class doesn't mean that you'll "loose" the "race", it just means that you're building a better, more capable machine. |
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Off Roader
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« Reply #25 on: February 26, 2008, 01:10:51 PM » |
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Ok well i dont mind about the tranny fluid, as long as it dont have to be cerculated (i murdered that word). Do you no if has to be circulated or not. I no it might be some work and maby not seem practicle but it would still be cool to try if it would work.
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A word to the wise..... wait, why should I give a word to the wise. It is the stupid ones that need help.
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Chris
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« Reply #26 on: February 26, 2008, 01:35:12 PM » |
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Don't believe that it does, but you might be better off researching whatever you have for a bike gearbox and possibly asking on some bike forums.
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Just because you move up in a class doesn't mean that you'll "loose" the "race", it just means that you're building a better, more capable machine. |
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Off Roader
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« Reply #27 on: February 26, 2008, 01:45:30 PM » |
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Yea i dont have one yet so im gonna take a saturday and just brouze the scrape yard so i guess it there are no lines goin in it aint pressurized. And it would make sence that the gears would move it. Thanks for your imput though.
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A word to the wise..... wait, why should I give a word to the wise. It is the stupid ones that need help.
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mtd
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« Reply #28 on: February 26, 2008, 04:18:42 PM » |
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Yall do realize that you cant just take the trans out of a dirtbike?Because they are part of the motor...so it wont work.I put a 3 wheeler motor/trans on my tractor a few years back and it worked great but it took a little fabricating to get the drive shaft to the rearend without coming into contact with anthing.By the way i did use a regular tractor transaxle as a axle...i just put it in 5th and took the shifter off.SO if you wanna go through with this you need the whole engine/tranny.
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speeddemon0308
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« Reply #29 on: February 26, 2008, 05:39:16 PM » |
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well.. dont forget the compression area is were the crank case would be on a 4 stroke... theres no "tans" fluied in there.. its in a separate part of the case....
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tntchitwood
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« Reply #30 on: February 26, 2008, 07:54:21 PM » |
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remove the head, jug,crank rod,timing chain, put a plate over the hole in the top of the trans to keep the oil in. Remove the stator and alternator flywheel (replace with cog? pulley), and viola! And no I don't have pics, I have never done it but could work.
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