motor cogging

Old 01-13-2013, 01:56 PM
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Default motor cogging

Have a question, I converted my CEN Genesis 7.7 to electric Im using the MMM system with the 2200kv motor, Im using two 4000 30c lipos and the motor started to cogg and getting very hot, is the truck heavy for this system?
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Old 01-13-2013, 02:16 PM
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30C seems like a low rating for that set-up, they might not be keeping up with the motors demands.
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Old 01-13-2013, 02:20 PM
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Originally Posted by lalonso90 View Post
Have a question, I converted my CEN Genesis 7.7 to electric Im using the MMM system with the 2200kv motor, Im using two 4000 30c lipos and the motor started to cogg and getting very hot, is the truck heavy for this system?
I have a good friend of mine that did the same, he ran TP 60c packs. Nothing could be done to keep the temps down, yes that truck is a beast and was too heavy. Guys run that same set up in erevos which are less then 1/2 the weight of a 7.7 and overheat them. Go back to NITRO!
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Old 01-13-2013, 02:37 PM
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Thumbs up motor cogg

Thanx for the info
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Old 01-13-2013, 04:19 PM
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Keep gearing down until the motor stays within proper temp and watch those batteries because they are going to swell if you are loading them that hard. Drop down several teeth on the pinion. You are quite over-geared.
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Old 01-13-2013, 08:34 PM
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Back the timing down to 0, and try to get your final drive ratio around 1:1 - 1:1.09.
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Old 01-14-2013, 05:41 AM
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Everything mentioned in here we have tried, this was just last summer. We even did a 23mm to 17mm hex conversion so we could put lighter truggy tires on it, still to no avail. Any timing and gearing combo you can imagine.

You have a 7.7KG truck, that's 17 lbs dry weight. Pull out the engine and tank, put in the electric conversion kit, motor, electronics, batteries and the truck is over 20 lbs. It's weight was 20.2 to be exact. You have erevos that weigh in at 9.2 lbs (Before Batteries) with the same motor that lots of guys overheat with little to no effort. Short story long, he pulled it all out and sold it, put in a LRP mill. Whatever you decide to do I wish you more luck then we had, it didn't help us that the ambient temps whilst playing with it were in the mid 90's to lower 100's either
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Old 01-14-2013, 07:02 AM
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+1. best to buy a flux HP or a TT MT EP..cens are way too heavy. even my E-LST2 with all the heavy alloys etc are borderline.
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Old 01-14-2013, 09:24 AM
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Default CEN

Thanx for the info, I think Im going back to nitro on this truck
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