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Old 05-01-2011, 06:52 PM   #1
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Default 6900kv gearing....esc hot! help please

currently am running a hpi sprint 2 flux, motor swapped to a castle creations 6900kv with a 2s lipo. Running the Sidewinder Sv2 ESC

gearing is 23p /87 spur and temps are as follows:

lipo battery: 104*F
cc motor: 140*F
ESC: 170*F


so I'm wondering, how do I get the esc temps lower? gear down on the pinion? and to what size should I change it to? I still want good top speed, but I want to be able to do donuts/drifting, etc without the motor overheating, or the esc.

I blew a tire off on my first run too, lol....this thing is retarded fast on top end.
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Old 05-01-2011, 07:56 PM   #2
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i would go down on the pinion let say 18 or 19 tooth
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Old 05-01-2011, 08:12 PM   #3
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i would go down on the pinion let say 18 or 19 tooth
alrighty, I will be heading to the LHS tomorrow...I think they had a RRP 18 in stock...will report the results back tomorrow.
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Old 05-02-2011, 05:35 PM   #4
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ok, switched to a RRP 18 pinion....top speed lets say...suffered a lot, grrr...I was enjoying the insanity for a little bit, lol.

Temps:
lipo battery: 95*F
cc motor: 155*F
esc: 140*F


also, I was mistaken on the stock gearing, it was a 90spur / 23 pinion up top (first post)

this was run on 18/90 with the temps in this post....I have a 87spur though, and I know -3 on spur = +1 on pinion right? to get some of my top speed back, and i'll closely monitor the temps, but I think that will be the ideal setup.

Then when I get some drift tires, I can switch between 18/90spur for drifting (more torque), to 18/87 for speed runs....
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Old 06-11-2011, 04:12 AM   #5
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Default 7500KV

HI I WAS THINKING OF PUTTING A 7500 KV IN THE SPRINT 2 FLUX PEOPLE ARE TELLING ME DNT WASTE UR TIME U WILL SHRED BELTS. LIKE WTF SERIOUSLY I BOUGHT THIS CAR ASKED THEM I WANT A CAR WITH DURABILITY AND WANT TO BE ABLE TO UPGRADE IT TO ITS POTENTIAL AND THEY TELL ME U WILL STRIP BELTS.

ANY IDEAS ON WHAT I SHOULD UPGRADE MY SPRINT 2 FLUX I HAVE THE 5700 KV ATM
I WANT IT TO GO FASTER AND HANDLE
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Old 06-11-2011, 05:42 AM   #6
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Can that ESC even handle the 6900kv motor?
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Old 03-31-2012, 08:47 AM   #7
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Can that ESC even handle the 6900kv motor?
This ESC CAN't handle that motor. That's why it's getting hot. I know this is an old thread, but I have been reading and seen this multiple times.
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Old 06-16-2014, 09:29 AM   #8
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If yall still see this i just got a sidewinder 3 with 6900kv and putting it in a losi scb 2wd wondering how it's gona work ? And wat gears I should run
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Old 06-16-2014, 10:08 AM   #9
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Check Castle Creation gearing chart. 6900kv it could take 12 or less toothed pinions.
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