OzFab
Well-known member
That wasn't directed at you hack; if you want to use square tube, go for it. Round tube may be a little cheaper but, it's also more work...
Many Questions
- Thread starter hackintoshMan
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hackintoshMan
New member
I know I was just joking around.
Yeah round will require more work, so now I need to decide weather or not I can actually grind the round tube down that much.
I said I changed my mind about the differential axle, but since this is for the road, shouldn't there be a differential?
Yeah round will require more work, so now I need to decide weather or not I can actually grind the round tube down that much.
I said I changed my mind about the differential axle, but since this is for the road, shouldn't there be a differential?
mckutzy
Well-known member
A diff is going to be expensive for this and not really needed. You need to keep things simple. I also think some more research on others projects will help.
What kind of brake calipers and rotors are you using? Mechanical or hydro? I think I have missed this part.
What kind of brake calipers and rotors are you using? Mechanical or hydro? I think I have missed this part.
hackintoshMan
New member
Im not sure. What would you recommend?
OzFab
Well-known member
Hydro, but that's just me... there's a bit of work involved but, they're pretty easy onve you know how.
Have you seen my build thread? Have a look at the vids in this post & tell me whether you think it needs a diff...
Have you seen my build thread? Have a look at the vids in this post & tell me whether you think it needs a diff...
hackintoshMan
New member
Yeah, I guess I dont really need it. What wheels would you suggest that I get? I really want some slicks, but they are a bit out of my budget...
OzFab
Well-known member
Any new wheels will cost you between $150 & $300; my advice is keep an eye on craigslist & ebay...
hackintoshMan
New member
Ok,Do I need to buy wheel hubs for the rear and just bolt on the front ones? And what about the width? Is wider better?
mckutzy
Well-known member
Like I said need to do some research. There are many options out there, mostly depends on what you want and have to spend.
hackintoshMan
New member
I have done lots of research, but I generally ask questions here first because you guys generally know so much.
Its like using a dictionary to look up a word while instead you could just type it into google.
hackintoshMan
New member
I just had an idea. While I was riding my bike today I encountered a hill. So to get up the hill I switched gears. The gears I switched were the chainrings.
Now, could I have the 13 tooth clutch go to the live axle with 45 and 60 tooth gears. To start, I would have the front derailleur from a bike set the chain to the 60 tooth gear to get up to speed. Then when I'm up to speed, I can make the derailleur switch to the 45 tooth gear.
I know that this will reduce the life of the chain, but it will allow for a simple transmission.
I will also have to create a chain tensioner of sorts to keep the slack out of it once it is switched to the smaller gear.
Is this idea possible?
Now, could I have the 13 tooth clutch go to the live axle with 45 and 60 tooth gears. To start, I would have the front derailleur from a bike set the chain to the 60 tooth gear to get up to speed. Then when I'm up to speed, I can make the derailleur switch to the 45 tooth gear.
I know that this will reduce the life of the chain, but it will allow for a simple transmission.
I will also have to create a chain tensioner of sorts to keep the slack out of it once it is switched to the smaller gear.
Is this idea possible?
mckutzy
Well-known member
Bicycle gearing will not do for a typical kart. It will destroy itself quickly. Even with motorized bicycles, they are not powered into the the bikes gearing.
Im assuming your using a clone type engine.
Im assuming your using a clone type engine.
hackintoshMan
New member
I wouldn't be using bike gears, only the bike derailleur to switch between the gokart gears.
Oh.. do a dry test without an engine to try, I assume you will shred the derailleur with a go kart chain (and the speed and torque it's moving)
Bicycle sprockets for that type have slightly angled teeth, kart sprockets don't
I assume changing gear to a larger sprocket will also lock the chain.
shifting up (down into a smaller sprocket) should work though.
please make sure it's working on the chain and sprockets you intend to use WITHOUT an engine attached to the system;
this way you will have no chain trying to attack your eyeballs
'sid
Bicycle sprockets for that type have slightly angled teeth, kart sprockets don't
I assume changing gear to a larger sprocket will also lock the chain.
shifting up (down into a smaller sprocket) should work though.
please make sure it's working on the chain and sprockets you intend to use WITHOUT an engine attached to the system;
this way you will have no chain trying to attack your eyeballs
'sid
hackintoshMan
New member
Oh.. do a dry test without an engine to try, I assume you will shred the derailleur with a go kart chain (and the speed and torque it's moving)
Bicycle sprockets for that type have slightly angled teeth, kart sprockets don't
I assume changing gear to a larger sprocket will also lock the chain.
shifting up (down into a smaller sprocket) should work though.
please make sure it's working on the chain and sprockets you intend to use WITHOUT an engine attached to the system;
this way you will have no chain trying to attack your eyeballs
'sid
I have decided against this idea. I think that the chain would be too wide to even fit into the derailleur. It would probably mess the chain up too.
I really want to have a transmission, but i am out of ideas
OzFab
Well-known member
Another problem you would face is the chain jumping off all the time; a go kart chain is a lot stiffer than a bicycle chain &, therefore, doesn't flex sideways very well.
The only sucessful transmissions I've seen are either a torque converter or a motorbike engine which has a gearbox built in.
There was a thread around here somewhere where someone built a two speed transmission, let me see if I can find it...
EDIT: Here it is
The only sucessful transmissions I've seen are either a torque converter or a motorbike engine which has a gearbox built in.
There was a thread around here somewhere where someone built a two speed transmission, let me see if I can find it...
EDIT: Here it is
hackintoshMan
New member
Thanks
Does a torque converter start out with say a 3:1 ratio and as rpm's increase it will get to a 1:1 ratio?
Does a torque converter start out with say a 3:1 ratio and as rpm's increase it will get to a 1:1 ratio?
2.7:1 - 0.9:1 afair yes
'sid
'sid
hackintoshMan
New member
so if I have the output sprocket at 14 teeth to a 45 tooth gear on the axle then the low ratio would be 8:1 which would get me up to 15mph on 11" wheels. At the high end, the ratio would be 2.7:1 and that would take me to 45mph. With the gradual ratio changes through the Torque converter, it seems that the 7 HP engine should be able to handle it right?
Yes, confirmed to be 2.7 at the low end and 0.9 on the other side.
http://www.bmikarts.com/PDF/Comet_TAV2_Torque_Converter.pdf
But you will not have a 14T Sprocket on the TAV2, it'll either be a 10T type 40/41 or 12T type 35.
That's basically the question I had a couple of days ago, so I can tell you what I learned that date..
Even with a TAV2 you should gear around 6:1 that is 72T #35 or 60T #40/41
on the axle;
at best you can get down to 5:1 (60T #35 or 50T #40/41)
That's what I was told basically, I didn't have my frame yet, so I couldn't exactly test my TC nor any of the gear ratios I want to try
'sid
http://www.bmikarts.com/PDF/Comet_TAV2_Torque_Converter.pdf
But you will not have a 14T Sprocket on the TAV2, it'll either be a 10T type 40/41 or 12T type 35.
That's basically the question I had a couple of days ago, so I can tell you what I learned that date..
Even with a TAV2 you should gear around 6:1 that is 72T #35 or 60T #40/41
on the axle;
at best you can get down to 5:1 (60T #35 or 50T #40/41)
That's what I was told basically, I didn't have my frame yet, so I couldn't exactly test my TC nor any of the gear ratios I want to try
'sid
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