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Old 03-27-2006, 07:41 PM   #151
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Forgot to mention, I used the 767 brushes. I did not change the springs. Also, the CO27 that I used was the Pro version.
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Old 03-27-2006, 09:45 PM   #152
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Quote:
Originally Posted by bvoltz
Thanks guys for the info..

My god, I'm running FDR of 7.5(25) to 7.2(26) (75/25 * 2.5 (TC4)). No wonder I'm not getting the motor hot... But this is where my motor likes it... 767 brushes, Purple springs 6.5 on pos, 6.25 on negtive.
Nothing wrong with that, that's close to what I run with mine(though I've also been experimenting with gearing shorter because after I played with mine, it gained top end almost EXACTLY like my Monsters, so I'm gearing it more like them). For the track I run on, 7.3-7.8:1 seems to be in the ballpark for this motor(& I also use rubber tires, no carpet tracks in my entire state), & it's working well for more & more of my friends who're trying it(just got a new guy started racing with it, & that range is really suiting him well too, especially after he overgeared his ROAR stock by a longshot & saw it go up in smoke)....
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Old 03-27-2006, 10:09 PM   #153
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Griz - I'm glad I'm not the only one that is making these numbers work... I'm like you, no carpet, just good old Rubber outdoors...

I'm like to start low and work up... So I do not cook the motor...
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Old 03-28-2006, 11:13 PM   #154
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Quote:
Originally Posted by Jmccormick
Yeah gearing gearing gearing I was a bit cautious at first and geared ita few teeth under what I geared the mnstrs at and yuck this motor does not like to be undergeared but when you get it right wow same top end power but the torque is awsome right from bottom to mid range it pulls harder and thats with the rcomended set up from trinity 4499 and red- purple+ I imagine that there are going to be some other combo's that will make this motor evevn better over time.
In the testing I have done on the dyno with this motor, it definately likes the Trinity 4499,4503,4504 and 4505 brushes a lot more so that the 767's that's for sure!
That motor wants Trinity brushes, and the numbers dont lie!
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Old 03-30-2006, 03:29 PM   #155
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I just spent the night working one of these motors over for a friend, and I thought I would share the results and maybe seek any advise. First this motor definately prefers newly serrated brushes. After doing all the cleaning, and polishing stuff, I zapped the can and began Dyno testing on my Fantom at 7.2 V. Comm diameter was .285". I tried 4 different brushes (did not have the stock ones?) 4499, 767, 769 and XXX. Tried 3 different spring combos. Trinity Green, Red, and Purple. Tensions from 5.8 - 8.5oz. Best results were 769's (new serrations), green / green 6.3 oz both. RPM = 19.9K, Watts = 65-66, Eff = 35, Torque = 105 Nmm w/ consistant Dyno runs. 5.8-6.0A @ 2V, and 10A @ 5V. Would love to see others results. Seems to be a good motor fitting somewhere in between the Monster (RPM), and the P2K2 (torque).
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Old 03-30-2006, 08:26 PM   #156
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if you can,try 4499 brushes with a .030 verticle slot about .060 deep with a red spring + and green -.i tried this with trinity black springs+and- and it was really quick.i would like to see how it is with a red and a green.i only race once a week and i dont get to try things often.let me know how it goes.im real interested
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Old 04-02-2006, 09:58 AM   #157
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Ok all you CO27 Gurus, I am having trouble with this. I have been reading here and asking around and people say that you can gear this motor one tooth higher than your normal monster stock. I race on carpet with rubber so I geared at 72/26 since the highest I would ever go was 72/25. I didn't notice any speed diffrence so I geared up 2 more untill my motor came off the track at about 175 degrees. I read about the brushes so I will try that next. I am still not getting any of the extra zip or power that I thought I would have with this motor. Is there something I am missing? Has anyone found a sweet spot for the CO's on carpet with rubber tire?


thanks for your help
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Old 04-02-2006, 11:25 AM   #158
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Ridge-I think you are gearing way to high for the layout at Trackside right now. Try a 25 or maybe a 24. If you are racing on Tuesday, I can rebuild you motor for you to try if you would like? I haven't noticed any real difference in laptimes between a CO27, Monster, or Roar stock, other than the laptimes don't fall off at the end of a run.
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Old 04-02-2006, 11:55 AM   #159
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hey guys wich bushes should i use for carpet indoor rubber and outdorr asphalt rubber
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Old 04-02-2006, 04:29 PM   #160
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Quote:
Originally Posted by Brian L
If you are racing on Tuesday, I can rebuild you motor for you to try if you would like?
If you are racing this sunday I would like to see what you can do. I will buy the brushes and springs so there is no problem there. So is that the only diffrence between the CO's and the ROARs? Its beginning to sound like I was putting too much hope into the motor.
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Old 04-02-2006, 04:44 PM   #161
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Quote:
Originally Posted by Ridge_Racer
Ok all you CO27 Gurus, I am having trouble with this. I have been reading here and asking around and people say that you can gear this motor one tooth higher than your normal monster stock. I race on carpet with rubber so I geared at 72/26 since the highest I would ever go was 72/25. I didn't notice any speed diffrence so I geared up 2 more untill my motor came off the track at about 175 degrees. I read about the brushes so I will try that next. I am still not getting any of the extra zip or power that I thought I would have with this motor. Is there something I am missing? Has anyone found a sweet spot for the CO's on carpet with rubber tire?


thanks for your help
On carpet with rubber tires we run about a 7.1-7 FDR with Monsters & 7.6-7.4 with a Binary at our local track. I run the Cobalt at 6.5 and it runs very well.
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Old 04-02-2006, 06:21 PM   #162
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Quote:
Originally Posted by BlackKat
On carpet with rubber tires we run about a 7.1-7 FDR with Monsters & 7.6-7.4 with a Binary at our local track. I run the Cobalt at 6.5 and it runs very well.
Out of curiousity, what size is your track?
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Old 04-02-2006, 06:48 PM   #163
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Quote:
Originally Posted by R/C Anonymous
Out of curiousity, what size is your track?
I honestly don't know.....Here's a site w/some pics www.turnmarshal.com/hobbyworld.html

I'm just giving him all of my gear ratios for sake of comparison
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Old 04-03-2006, 10:24 AM   #164
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What would guys think is the a good starting point for both the Rollout and FDR for the following motors? Does this sound right on the ones I have here?

Rollout / FDR
CO27 27.4 / 6.5
Monster ? / 7 to 7.1
Binary ? / 7.4 to 7.6
Roar ? / ?
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Old 04-03-2006, 11:18 AM   #165
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I've got kinda a silly question here. I have 2 of these motors and both appear identical except the Epic motor tags are a little different. They are both white but one has the "Epic 27" in the normal green lettering and one has it in red. Any clue? I've always remembered the stamp being green except for handout stockers..
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