torque converter

Buggy Specific

torque converter

Postby kartlovr@2010 » Sun Oct 14, 2012 10:19 pm

hey guys,

im looking at building a fun kart 3, however the motor that i would like to use (honda gx340) has 9hp, although the net rating is 7.8. if the output is 9hp, it would be too much for the current comet torque converter. Will this be a problem? if not, is the gx340 simply too big for the kart?

thanks,

KL
If it ain't broke, don't fix it
kartlovr@2010
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Re: torque converter

Postby Tony » Mon Oct 15, 2012 1:28 pm

Its right on the limit of the torque converter.
As long as you stay with 18" tyres you should be OK with the 9.0 hp.
Just make sure the engine has a 1" crank & not a metric crank like many Honda engines.
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Re: torque converter

Postby kartlovr@2010 » Mon Oct 15, 2012 7:36 pm

no worries man thanks heaps
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Re: torque converter

Postby kartlovr@2010 » Mon Oct 15, 2012 10:32 pm

Another question then, will the honda gx390 fit on the back of the fun kart, along with the torque converter (ive found a more powerful torque coverter made by GTC manufacturing), just because it doesnt look like theres much room behind the seat for a 40x45x44cm motor
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Re: torque converter

Postby Tony » Tue Oct 16, 2012 11:48 am

The GTC torque converter claims a higher power rating, but in fact its eactly the same as a standard Comet TAV2.
Same parts.
So it certainly does not have more capability.
If anything will give it will be the belt.
The belt will slip due to more engine torque.
The way to help overcome this is to stay with the low gearing, (12 to 82 tooth) & small wheels.
With low gearing there is less chance of belt slip on acceleration.
The motor may just squeeze in, but at least 50mm extra length would help.
"There can't be a practical reason for believing in what isn't true" – Sir Bertrand Russell.
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Re: torque converter

Postby kartlovr@2010 » Tue Oct 16, 2012 1:23 pm

cool thanks tony, what would you think would be the top speed of the final kart, on a flat road, with these parts and motors?
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Re: torque converter

Postby Tony » Tue Oct 16, 2012 1:46 pm

The engine size does not make any difference to speed, (unless you overgear the final drive).
Its the gearing.
All Industrial engines rev to 3600 RPM.
So with a larger engine you just get there quicker.
About 55 kph.
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Re: torque converter

Postby kartlovr@2010 » Tue Oct 16, 2012 1:51 pm

awesome thanks mate
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