gearing

Old 08-30-2012, 05:37 AM
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Running a 14t pinion and a 56t spur, what should I change to get a little speed out of it? Pinion or spur or even both?
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Old 08-30-2012, 07:11 AM
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To increase top speed you would either increase the pinion size OR decrease the spur size. Doing this at all assumes, of course, that your motor/engine can handle the increased load.
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Old 08-30-2012, 08:13 AM
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Manna monster, I'm thinking of a 12t pinion and maybe a 65t spur?
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Old 08-30-2012, 09:34 AM
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Originally Posted by xTHExSA1NTx View Post
Manna monster, I'm thinking of a 12t pinion and maybe a 65t spur?
No, you are going the wrong way. You want something like a 16/54.

Be carfeul though, I would recommend doing one gear at a time 2-3 teeth at a time. If you make too big of a jump then you will be sluggish at the bottom and you can hurt your equipment.
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Old 08-30-2012, 12:01 PM
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So more teeth more speed, less teeth more torque?
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Old 08-30-2012, 02:07 PM
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For the pinion yes.

On the spur gear it is more teeth = more torque. Less teeth = more speed
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Old 08-30-2012, 07:45 PM
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ok fellas, this is what I ordered so what spur should I run with it to get the most speed
Attached Thumbnails gearing-castle.jpg  
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Old 08-30-2012, 09:57 PM
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Originally Posted by xTHExSA1NTx View Post
ok fellas, this is what I ordered so what spur should I run with it to get the most speed
Uhm, send it back and get the correct pinion for your "Manna" Monster.
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Old 08-30-2012, 10:13 PM
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Tell us what truck you're running, motor type/kV rating, and the tires you'll be running. From there, we can tell you how to gear it.
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Old 08-31-2012, 06:02 PM
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Losi 8 with mamba 2200kv motor and monster esc, far as tires just stock
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Old 08-31-2012, 08:15 PM
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Originally Posted by xTHExSA1NTx View Post
Losi 8 with mamba 2200kv motor and monster esc, far as tires just stock
Ah, here we go! Assuming the 8ight Buggy. This was stock geared 14/48 from what I understand, and at 1.23:1 Drive Ratio, that's REALLY TALL.

3.30 Diff Ratio like every other E-Buggy ever, 4.45" tires, 4S LiPo.

At 14/48, you'll get ~42mph, so-so torque, and probably have heat issues.

At 13/48, things get a lot more sane. 1.14:1 Drive Ratio, ~40mph, still might be a little much depending on your setup.

I'd say start at 13/48 and move the gearing around if you find you've got the thermal headroom, or are coming up short (too hot).

Edit: Saw your first post, 14/56 in an 8ight? That's 1.04:1, try 13/48 or if you want to keep the 56t spur and have room, 15/56 is 1.13:1, which is very close to the 1.14:1 that 13/48 gives.
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Old 09-01-2012, 07:10 AM
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I picked the losi up as a roller, and sold the erevo but kept the esc and motor, so if I come up short(motor hot) that means I'm over gearing? Never thought that gearing was as complicated as it seems
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Old 09-01-2012, 12:16 PM
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Yep, motor too hot (180f) means over-geared.
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Old 09-03-2012, 09:26 PM
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yeah but i noticed the other day when we put 6s to my dads revo the thing got hot fast...
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Old 09-04-2012, 07:01 AM
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running a 6S will do that
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