Which engine is better or faster?

[VirtualGod]

Hi guys can you tell me which engine would go faster?

Loncin 2.5hp - 3,7 / 3000 N.m/rpm - 97cc - Comp. Ratio 5,6:1

Or

Weima 6.5hp - Max Torque 3600 - 196cc

Which engine would run a go-kart faster?

Sorry but Weima didn't put all specs of the engine.

 

[anickode]

The more powerful one will make your kart go faster. (Provided that gearing is matched to the power)

 

[VirtualGod]

The more powerful one will make your kart go faster. (Provided that gearing is matched to the power)

What do you mean by gearing? Gear and chain between axle and engine?

I will buy the 6.5hp one then. Can you check my last thread?

Thank you

 

[anickode]

Yes I mean your sprocket sizing. If your go-kart had for example of 10 tooth clutch in an 80 rear sprocket, it would have enough gear ratio for the 2.5 horsepower engine to run it. if you put the same gear ratio on a 6.5 horsepower, it would also run it fine but the top speed would still be limited by the 3600 RPM governor. since you have more power, you can use a shorter gear ratio.

 

[VirtualGod]

Yes I mean your sprocket sizing. If your go-kart had for example of 10 tooth clutch in an 80 rear sprocket, it would have enough gear ratio for the 2.5 horsepower engine to run it. if you put the same gear ratio on a 6.5 horsepower, it would also run it fine but the top speed would still be limited by the 3600 RPM governor. since you have more power, you can use a shorter gear ratio.

I'm planning to use 10T and 50T or 40T

Would it go faster If I remove the governor?
And what do you think about tires? Are 15" ones too big for 6.5hp or is it ok? What is the best tire size?

 

[mckutzy]

First what is it your building???
6.5hp engines can handle most tire sizes...On a bike.
On a four wheeler machine... A little different...

Typically you want to start with a 6:1 ratio, then adjust from there..

 

[VirtualGod]

Road build but my problem is about tires. 6:1 is too slow And getting different gears isn't affordable.

 

[mckutzy]

What's your location? Always fill out your location, it helps us help you...
What's your budget?
Do you have tools(welder grinder hand tools ect), know how to weld???

 

[VirtualGod]

I know how to weld but I don't have a welder.

I have a angle grinder, cord drill and other basic hand tools. My budget is around 350$ Engine is very cheap. 100$. 250$ for other parts : rear gear 30$, two axles: 55-60$, clutch gear: 12$~, gas wires are ok, just bicycle wires. Not sure about tires because they're too expensive. I will try to build it without welder but maybe it could be done with welder too.
Can you tell me the other parts that I need?

 

[mckutzy]

I reckon your going to need at least a few $100 more...
The best situation in this case, find a donor on Craiglist. Fix up something that needs motor and a few other items but has good wheels on it.

What "wires" are you talking about?

 

[anickode]

Road build but my problem is about tires. 6:1 is too slow And getting different gears isn't affordable.

Depending on your tyre size, 6.1 ratio might be the most you can go.

No matter what your tyre size and gear ratio, 25-30mph is about all you'll get from a stock 6.5hp with a centrifugal clutch. big tyres with a big ratio, little tyres with a little ratio, doesn't matter. Hasn't got the power.

 

[VirtualGod]

Depending on your tyre size, 6.1 ratio might be the most you can go.

No matter what your tyre size and gear ratio, 25-30mph is about all you'll get from a stock 6.5hp with a centrifugal clutch. big tyres with a big ratio, little tyres with a little ratio, doesn't matter. Hasn't got the power.

I won't use a cent clutch. Direct drive

Another question, how can I fit 40mm axle to tire? Because I can't find 40mm inner diameter tires.

 

[ezcome-ezgo]

No offense intended, but you don't understand the fundamental principles of how an engine >> wheels relationship works. An engine in a kart (racing karts are an exception) needs a clutch so that the kart can be at rest when the engine is idling. The axle is a beam that sits in bearings, on it's end are wheels directly mounted, or hubs that wheels can be secured to. The inboard portion if the axle typically has a sprocket and brake.

 

[Bbqjoe]

Tube fishing.

 

[anickode]

I won't use a cent clutch. Direct drive

So... You're going to Flintstone it to start the engine? Or are going going to put it up on jack stands, start the engine, and kick the stands out as you jump in?

 

[VirtualGod]

So... You're going to Flintstone it to start the engine? Or are going going to put it up on jack stands, start the engine, and kick the stands out as you jump in?

Okay I found a centrifugal clutch It's 20$ on eBay.

 

[Hellion]

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