TWIN Drag Kart

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Rotore

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Well i decided what to do with teh Kohler which by the way is getting honed, piston and piston rings.

Building a TWIN CYLINDER DRAG KART

Drive train: Teh rear end (engine, cradle to axle bearings) will be 30 inches long and 15 inches wide and i'll be using 19x8 turf savers for teh street since i'll be competing against my bro in-law and 18x9.5 slicks w/ a gear ratio between 6:1 and 7.5:1 on a Norman Racing clutch till i find a CVT or find something similar to it hehe. Thats it for putting power to teh ground.

Brakes & Handling: I was thinking of a brakes of a motorcycle on the rear axle and mini bike brakes in the front (front brakes are over kill i know but just to do some long burn outs on the street) and will have to make my own front spindals so will need help on that. Finally for rubber like i said mainly 18x9.5 slicks in the back and 12x3" tires in the front.

Now heres a picture of teh clutch and of the reare axle that i pieced together earlier.
 

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jr dragster T

jr dragster T

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Watch that drive hub your using there. A couple members from this forum have purchased that one and found it didn't even roll true and caused chain alignment issues.
 
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Ill be lucky if that clutch survives dude that'll be a one of the things id expect to fail within a couple hours use.

I might need'em when i switch to a belt slip clutch hehe
 
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modelengineer

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Why not just start with a belt slip? I like the idea of a two belt, two tensioner, different ratio belt system. Maybe even 3 speeds if you find it's winding out too much.
 
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Lol I thought that would be around 8:1 but arent pully and and sprocket ratios calulated the same.

But I want to use anything from 6:1 to 8:1.
 
Kaptain Krunch

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Rotore said:
Lol I thought that would be around 8:1 but arent pully and and sprocket ratios calulated the same.

But I want to use anything from 6:1 to 8:1.
Click to expand...

Pulleys and gears are calculated the same basically, say you have a 6" pulley running to a 12" pulley, you simply divide 12/6 and that equals a 2:1 ratio. but when you have 2 ratios you dont ad them, you multiply. So for instance you had said a 2:1 and then a 6:1, multiply 2x6 you get 12:1
 
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Russ2251 said:
How did you acquire it?
Click to expand...
From bmikarts
Kaptain Krunch said:
Pulleys and gears are calculated the same basically, say you have a 6" pulley running to a 12" pulley, you simply divide 12/6 and that equals a 2:1 ratio. but when you have 2 ratios you dont ad them, you multiply. So for instance you had said a 2:1 and then a 6:1, multiply 2x6 you get 12:1
Click to expand...

Oh ok so if I run a two inch pulley on the engine to another two inch pulley on the Jack shaft and a ten tooth sprocket to a sixty I'll have a 6:1 ratio right
 
Kaptain Krunch

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Rotore said:
From bmikarts


Oh ok so if I run a two inch pulley on the engine to another two inch pulley on the Jack shaft and a ten tooth sprocket to a sixty I'll have a 6:1 ratio right
Click to expand...

Correct, but you should use at least 4" pulleys, 2" pulleys will slip a lot more.
 
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