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 How do you make an auto go fast?

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crazykid1994
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k2500life
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PostSubject: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 9:01 am

How do you make an auto transacle go faster,
Not sure how because it already has a small pulley on it and it goes like 5mph at most. Help?
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 9:18 am

Auto? Do you mean hydro? Can't really speed one up unless you play with internal gears. One I have uses planetary gearsets, which are stupid complicated to figure out ratios for.

Only other way is to mount another axle, and drive it with the hydro. Then you could change the ratios.

I accidentally sped up a hydro on my zero turn. Reduction gears were broke, so I bought another transmission out of a regular tractor. Gears were not the same ratio, and I ended up with a zero turn that was twice as fast.
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 10:09 am

No it's an auto
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 12:40 pm

k2500life wrote:
No it's an auto

So it shifts from 1,2,3 etc on it's own and back down again? I need to see this please...
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 1:57 pm

I may not know everything about mower's, but never seen an automatic. Hydro, or MTD vari-speed is only thing I can think of, and neither are well suited to modifying. I'm sure someone has speed up the MTD vari drives, just a pain is all.

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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 2:01 pm

This is an excellent read on the types of transmissions and transaxles you will find today - if it's a true automatic it's most likely a CVT. Still, worth a read:

http://todaysmower.com/2011/what-you-need-to-know-transmission-types/
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 3:46 pm

U can make a converter in the middle and buy two different belts to run.
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crazykid1994
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 7:34 pm

i changed the drive pulley on one i had. it had a 3 on the tranny already so i put a 7 on the engine. top speed was 12 mph tho... not fast enough for me
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 8:23 pm

Speedfreek241 wrote:
U can make a converter in the middle and buy two different belts to run.

"Converter"? Please explain.

Yeah- I really want to know what this is, too. If it's not a Hydro or a vari-drive, then it must be REALLY new! To the OP- please post pics of your mower.
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 8:52 pm

It is probably a hydrostatic, and on the shifter on the fenders it says automatic. you can't pulley swap them, the hydraulic motor will burn out. The only way is to put bigger tires on it.
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 8:58 pm

It would be possible to run a sprocket from the original axle to a separate axle
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 9:06 pm

murraymayhem i pulley swapped my hydro... didnt burn it out either. i was doing 12 mph with stock turf tires
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 9:44 pm

How do you make an auto go fast? Image33How do you make an auto go fast? Image34
How do you make an auto go fast? Image35
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 10:16 pm

it looks like a hydro
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 10:22 pm

no doubt its a hydro. the odd shape is due to the hydraulic pump in it. pulley swap the engine and you can get somewhere around 10 mph and bigger tires but you will probably burn it up. hydro's arent ment to take the strain like gears
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 10:32 pm

Ok I did a bad job at explaining this. What I mean by converter I'm mean like a transaxle go from the motor to a pulley that is linked with a smaller pulley so that it give you even more speed. This is what I was going to do on my hydro.
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crazykid1994
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 10:38 pm

a hydro can only take so much tho before it starts whinning and slipping
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 10:59 pm

Ya well this is for my friend but I found another mower with two opposed twins with it for 40$ with magnetos Very Happy I'm keeping the engines and giving him another motor I got for scrap that we just got running today and ported and polished the head 14.5 hp and the other mower is a 5 spd
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 11:06 pm

where do you find engines?
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 16th 2013, 11:07 pm

My buddy gave me like 7 engines for scrap but like 3 of them actually run and this mower is from him
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 17th 2013, 5:38 am

Speedfreek241 wrote:
Ok I did a bad job at explaining this. What I mean by converter I'm mean like a transaxle go from the motor to a pulley that is linked with a smaller pulley so that it give you even more speed. This is what I was going to do on my hydro.

A jackshaft.
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PostSubject: Re: How do you make an auto go fast?   How do you make an auto go fast? Icon_minitimeJuly 17th 2013, 12:22 pm

Yah sorry a jack shaft that's what I meant.
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