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hackintoshMan

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Ahh. Let me read up about torque converters…

EDIT: ok, so with 15" wheels and the 72/13 ratio, the max speed would be 29 mph. What kind of impact would a torque converter add to that speed?
 
OzFab

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The beauty of a torque converter is you get the best of both worlds; you can gear a little higher to increase top speed & still have decent acceleration.

As I have no personal experience with them, someone else will have to jump in with exact numbers...
 
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Let me get something straight. Horse power is like the amount of force the engine has and if it was on a flat surface it would not increase or decrease the speed. It is the RPM's that will increase or decrease the speed. If you were to be hill climbing then would you want more Horse power to get up the hill?

And a torque convertor is kinda like a transmission in a way?
 
firemanjim

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hackintoshMan said:
Let me get something straight. Horse power is like the amount of force the engine has and if it was on a flat surface it would not increase or decrease the speed. It is the RPM's that will increase or decrease the speed. If you were to be hill climbing then would you want more Horse power to get up the hill?

And a torque convertor is kinda like a transmission in a way?
Click to expand...
You are almost exactly correct... 2 karts have everything the same EXCEPT one has a 6.5 and one has an 8 hp.... They will BOTH do the same speed,BUT the 8hp will get to that speed first. Rpms, at this point,will give you speed. Same karts,same situation, EXCEPT 6.5hp has an rpm limit of 4400 and the 8hp is set to 3600.... the 8hp will beat the 6.5 out the hole,but the 6.5 will walk away once the 8hp hits its 3600 rpm limit.....
A torque converter is a constantly variable transmission. ...
Hope that clears things up a bit....
 
firemanjim

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:smiley_omg:Man, for $800, you can build a sweet a§§ twin engine kart. I just cant see BUYING a kart that expensive. The kart I'm building my daughter right now hasn't cost me anything yet. (cut up mini-quad and spare steel tube stock) The kart I'm resto modding for my oldest son has me in the hole for about $600 but its a used "crossfire" buggy and I added a 200cc 4 wheeler motor. When I'm done,I expect to have about $800-1000 in it,but it will be the ultimate kart/mini buggy in this neck of the woods.... Can't you find a used CHEAP kart near you? Around here,they go from FREE to a few grand (race karts) . Look around high n low.... put the word out that you're lookin....you might just find one, or it find you.... :thumbsup:
 
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I have been looking at engines and on BMIKarts and there is a nice Briggs & Stratton But in the description it says,

"WARNING: Briggs & Stratton® Engines are not designed for and are not to be used to power: fun-karts; go-karts; children’s recreational or sport all-terrain vehicles (ATVs); motorbikes; hover-craft; aircraft products; or vehicles used in competitive events not sanctioned by Briggs & Stratton Corporation. For information about competitive racing products, see www.briggsracing.com. For use with utility and side-by-side ATVs, please contact the Briggs & Stratton Engine Application Center, 1-866-927-3349. Improper engine application may result in serious injury or death."

If it is not intended for fun karts or go karts then why would it be on a go kart website!

EDIT: Never mind, Im getting one from Harbor Freight.

Now will the axle that was mention earlier that has a differential on it be able to withstand this engine?
 
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hackintoshMan

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Gosh this is harder than I though it was. There needs to be like a guide for new people so that they can see what is compatible and what not. Maybe like a base build with all of the components listed and we can change a few things around. I already have 3 index cards full of parts that I would need.
 
soggycrashed

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(My advise)
I would make a basic frame out of steel pipe or box tubing. I would put a roll-cage so you don't snap your neck if you flip the cart.
Put some leather around plywood and cushion and bolt it to the frame. Buy an engine mount from a seller like BMI Karts. 5.5hp will get you in the 20s. I would leave the governor on but if you decide to remove it find some way to attach a tachometer to monitor the RPMs.
Smooth tires are best for traction on asphalt.
As for gearing, I'd do a 72/12 which will get you enough torque plus a bit over 25 MPH (for my engine at least) on 9" wheels. No idea what it would be for 6" wheels. That seems a bit small.
Drum brakes are fairly cheap, but bands do the job and are very easy to set up. And they're cheap.

Or you could just buy a beat up kart on craigslist if you're not into welding.
 
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Thanks, I think that I want mine to be an open top, but it will be a bit wider to improve stability. The engine is 7HP. I think that will be fun to play with. The hardest thing for me is getting all of the small pieces like steering arms and hubs and I don't like the uncertainty of compatibility between components.
 
Doc Sprocket

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hackintoshMan said:
"WARNING: Briggs & Stratton® Engines are not designed for and are not to be used to power: fun-karts; go-karts; children’s recreational or sport all-terrain vehicles (ATVs); motorbikes; hover-craft; aircraft products; or vehicles used in competitive events not sanctioned by Briggs & Stratton Corporation. For information about competitive racing products, see www.briggsracing.com. For use with utility and side-by-side ATVs, please contact the Briggs & Stratton Engine Application Center, 1-866-927-3349. Improper engine application may result in serious injury or death."
Click to expand...

That's called a legal disclaimer. This is so that when you build your kart and kill yourself, you can't sue Briggs And Stratton, 'cuz they told you not to, that's all.

If it is not intended for fun karts or go karts then why would it be on a go kart website!
Click to expand...

Because everybody knows damm good and well what it will be used for. From a legal perspective, it is the end user (NOT the seller) that must make a determination as to the usability of the product.
 
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hackintoshMan

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toystory_4wd said:
That's called a legal disclaimer. This is so that when you build your kart and kill yourself, you can't sue Briggs And Stratton, 'cuz they told you not to, that's all.
Click to expand...

Well if your dead then you can't sue them:roflol:


Here are some rough plans that I made.
 

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hackintoshMan

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I will swap the axle with the differential in it for a live axle because I can save around 80 bucks and I may drive it on some gravel/dirt occasionally. So the first picture above is inaccurate.
 
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