REWINDING A BRUSHED MOTOR???

by **Factory Team Gair** » Fri Jun 29, 2007 10:57 am

Mike, going from a 19,000 rpm to 30,000 rpm motor would mean putting in a smaller pinion. Higher gear ratio numerically, say going from 10:1 overall ratio to 12:1 ratio (motor revolutions/axle revolution).

by **combatking** » Fri Jun 29, 2007 11:41 am

why would you put in a smaller pinion gear with a higher RPM motor? the more RPMS the faster the 10 tooth stock pinon is going to spin making the truck faster........ I had one of these trucks a long time ago and used to run the stock 540 motor which only spun 16000 rpms ( slow ) and went to a 16 turn and it was faster!
so why put a smaller pinion on with a higher RPM motor?? again i can only drop 2 teeth if i special order a pinion for a CLOD... that is not making any sense to me...

by **Factory Team Gair** » Sat Jun 30, 2007 5:02 pm

If I'm not mistaken, it's like putting a smaller prop on a high rpm motor vs a larger prop on a slower motor in a plane. You're matching power/torque/rpm to a load.

by **combatking** » Sat Jun 30, 2007 5:17 pm

well putting a smaller prop on a plane will lower the amp draw and give your higher rpms so that i understand, so if i cant lower my pinion size then i have to get batteries that can handle that amp draw correct?

by **Factory Team Gair** » Sat Jun 30, 2007 7:26 pm

Well, if the motor is way faster and overgeared, then it will struggle to get up to speed and overheat. 12:1 is good for fast-ish motors and down to 10:1 is good for slower motors in trucks.

by **Mark** » Sat Jun 30, 2007 10:21 pm

What temp should the motor be at ?

by **combatking** » Sun Jul 01, 2007 1:00 am

its funny that you say the actual gear ratio that is stock with my truck with a 10 tooth pinion, its 12. 1 and with a 12 tooth its 11.1 ratio... i just won a speed gems 15 turn motor on ebay for $5.50 brand new in package we will see here in a matter of a few days.......... ill let ya know how things go!

by **Mark** » Mon Jul 02, 2007 1:32 am

combatking wrote:well putting a smaller prop on a plane will lower the amp draw and give your higher rpms so that i understand, so if i cant lower my pinion size then i have to get batteries that can handle that amp draw correct?

Finally got around to posting this . http://boiserc.com/forum/viewtopic.php?p=25424#25424

by **Factory Team Gair** » Mon Jul 02, 2007 11:29 am

I'm not saying anything about the gear ratios in your truck, I'm talking about gear ratios in trucks in general.

by **combatking** » Mon Jul 02, 2007 12:10 pm

i understand what you are saying Gary, i was just mentioning that my gear ratio was exactly what you had mentioned thats all.
Also i found out yesterday that my ESC can handle a 3 cell lipo
HAHA i dont know how long the brushes are going to last but she sure is faster with this battery! lol i can tell this motor isnt going to last long.. but she is just for BASHIN around

REWINDING A BRUSHED MOTOR???

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