13,14, or 15 tooth pinions

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darrenbigfootfan
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13,14, or 15 tooth pinions

Post by darrenbigfootfan » Sat Jun 11, 2016 4:26 am

I have a clod with Titan 550s, an EVX-2 and 2 2s lipos. I'm running 14T pinions right now and I want a little more speed. How much affect would 15T pinions generate and how much torque would I lose? Does anyone here run 15T pinions? Any advice would help. Thanks!
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andymac0035
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Re: 13,14, or 15 tooth pinions

Post by andymac0035 » Sun Jun 12, 2016 3:50 am

I've not run 15T pinions with those motors, but I have run 19t pinions with them on 4S. I think temps went up by 10 degrees.
So basically, any of the choices your considering are fine, but if your craving speed, bigger is definitely better.
The bigger you go the more dremel work you will have to do though.

Here's the terminator back when I first tried 19t pinions with titans on 4S (2Sx2).

[youtube]HwIfJWaLCdU[/youtube]

darrenbigfootfan
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Re: 13,14, or 15 tooth pinions

Post by darrenbigfootfan » Sun Jun 12, 2016 8:58 pm

What do you mean by dremel work? Sorry
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darat76
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Re: 13,14, or 15 tooth pinions

Post by darat76 » Sun Jun 12, 2016 10:55 pm

the stock clod gearbox/axle comes with 1 set mount point for the motor so that the pinions mesh properly with the spur gear. changing the number of teeth of the pinion increases the diameter of the pinion with more teeth than stock, and decreases the diameter with less teeth than stock.

this means to change the pinion on the clod you need to make motor mount holes/slots in the gearbox cases, or buy an adjustable motor mount (think CPE has one) to allow you to keep the mesh correct with different size pinions. If the mesh is to tight it will bind up and damage the gears and/or break the casings of even bend shafts, if the mesh is to loose the pinion will end up slipping on the spur and strip teeth off of the spur gear as it's plastic.

darrenbigfootfan
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Re: 13,14, or 15 tooth pinions

Post by darrenbigfootfan » Sun Jun 12, 2016 11:53 pm

Gotcha! Thanks, that makes sense.
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andymac0035
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Re: 13,14, or 15 tooth pinions

Post by andymac0035 » Mon Jun 13, 2016 1:19 am

Actually there is a little more to is than that.
This explains and shows the dremel work I am talking about.
viewtopic.php?f=46&t=28235&start=75

darrenbigfootfan
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Re: 13,14, or 15 tooth pinions

Post by darrenbigfootfan » Mon Jun 13, 2016 4:20 am

Wow, yea that looks like quite a bit of work. If your are gonna do it, you gotta do it right. I don't want to risk damaging my gears. Thanks for the info, both of you!
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132NHAF
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Re: 13,14, or 15 tooth pinions

Post by 132NHAF » Wed Jun 15, 2016 10:01 pm

darrenbigfootfan wrote: I don't want to risk damaging my gears. !
Said AndyMac........NEVER!!! LOL
Scott T

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