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Has anyone tried 78/24 gearing?

Has anyone tried 78/24 gearing?

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Old 03-02-2018, 05:48 PM
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Default Has anyone tried 78/24 gearing?

Thinking about trying this in my SC10 with the castle sct 3800. Any thoughts?
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Old 03-02-2018, 06:33 PM
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If you can run it with the motor temps below 160F go for it. Gearing depends on alot of things but mainly temps. If you do not already have one get a non contact thermometer like this https://www.harborfreight.com/non-co...ter-93983.html or a infrared thermometer.
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Old 03-03-2018, 07:24 AM
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Thanks for the input. Got the gearing in last night. Going to do some temp runs today. Ill report back my findings!
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Old 03-03-2018, 08:03 AM
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small advice.. you might want to post what pitch of gearing..

32,48,64...

I run 64 pitch in my RC10-SC5M truck... 100/34......

but I am guessing 48 pitch...

and yes.. temperature.. infrared thermometer. and limit to 160 "F"....
next is acceleration.. based on available traction and tire grip.
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Old 03-04-2018, 03:38 PM
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It is the ratio between the two gears that makes a real difference. This 78/24 is the same as 39/12...or 3.25 to 1.

If you want to know if this combination of gears will fit in your gearbox, then try the SC10 thread to see if someone has done this already.

If you are asking if this gearing will accomplish what you want it to accomplish, we need to know what you are trying to do. Also, what gearing are you starting with? I know, details, details....
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Old 03-07-2018, 06:25 PM
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Originally Posted by fredygump View Post
It is the ratio between the two gears that makes a real difference. This 78/24 is the same as 39/12...or 3.25 to 1.

If you want to know if this combination of gears will fit in your gearbox, then try the SC10 thread to see if someone has done this already.

If you are asking if this gearing will accomplish what you want it to accomplish, we need to know what you are trying to do. Also, what gearing are you starting with? I know, details, details....


Pitch is 48, gearing is set on the mentioned 78/24. truck actually runs great on 2s 50c, temps are low around 115 max, ambient temps are around 70 outside. Gearing is in a sc10 2wd. Wheelies on asphalt and launches in dirt/grass. Haven't tried my 3s in it yet.

I was just curious if anyone has tried it and was wondering,if it would fit. I had a 72t spur that my 24t pinion wouldn't reach so 78/24 was my next step to try. I am considering dropping my gearing some if I drop,the 3s in.
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