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Old 11-25-2008, 01:24 PM   #1096
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they are both johnson 540 motors.. tested at 7.2 volts.

thanks for the advise granpa.. ill use the one that draws 1.7amp for saturdays race..
Just out of curiosity and for my own information, did you water dip those motors for break in???? Sometimes that can give you unusually high amp draw readings with the cans that had the soft brushes. You can, if you're lucky, get the amp draw readings down to more normal readings by cleaning them very thoroughly. If you have access to an ultrasonic cleaner, clean them with a mild solution of water and dish detergent. If not use a lot of motor spray.
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Old 11-25-2008, 04:54 PM   #1097
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yes i did.. i water dipped them for break-in then played with both of them at the track.. reced a few times..
they were tested after i used them for practice.. they were not clean at the time.. they were also both soft brushed johnson 540 motor..

ill try to thoroughly clean them and test them again. ill up date you granpa of the results.. maybe tommorow or the day after tommorow. have to go to my friends coz i dont own a dyno.

btw, i geared them at 5.1 fdr, after a run i checked the temp and it gives a reading of 94.. the guys at our local track said i can even lower the fdr to about 4.9 because its temp is not yet over 100..
well... im confused. hehehe! i thought racing rc was easy, just drive good and thats it. now i learned that you have to consider a lot of variables. maybe im starting to learn.
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Old 11-25-2008, 08:26 PM   #1098
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Over here in NZ we run a 540 class. but we are usually in the 4.1 - 3.9 FDR area. But it all really depends on your track.
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Old 11-25-2008, 09:43 PM   #1099
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i tried 4.3 fdr before, my silvercsn smoked! it literally smoked.. after that the motor is busted. hehehe! maybe because the climate here is hot, thats why.. im from the phillipines by the way.. thanks matt!
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Old 11-25-2008, 09:49 PM   #1100
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Matt : What kit were you using a 4.x FDR with? I'm guessing a shaft car? Doki's using an Xray T2. I've used 4.6 before in a Ta03 with a loose belt. Motor was baking hot but the car was fast.
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Old 11-25-2008, 10:06 PM   #1101
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I'm running a Hot Bodies Cyclone S. Internal Ratio 2.4375.
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Old 11-25-2008, 10:12 PM   #1102
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Doki's motor must have been a lemon then . We'll try running that FDR again tomorrow.
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Old 11-25-2008, 10:25 PM   #1103
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Did you have a heatsink on the motor?
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Old 11-26-2008, 12:52 AM   #1104
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i have heatsink but without fan...
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Old 11-26-2008, 11:39 AM   #1105
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Well, your motor could have been a dud then. Then only reason that I can think of it if it had been only partly run in. As the brushes tend to arc in them when they are only partially run in and makes the motor run hot. Was it a mabuchi or johnson silver can?
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Old 11-26-2008, 12:12 PM   #1106
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I've run 3.5-3.75 in the F103, but not in a TC.
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Old 11-26-2008, 04:24 PM   #1107
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Well, your motor could have been a dud then. Then only reason that I can think of it if it had been only partly run in. As the brushes tend to arc in them when they are only partially run in and makes the motor run hot. Was it a mabuchi or johnson silver can?
its a johnson silver can with the soft brushes.. i dont think its not yet fully broken in.. i water dipped it and used it in several races.. anyways, im new at this silver can thing.. so maybe its not yet really broken in. hehehe!
thanks matt..

am starting to learn a lot of stuff about silver can from you guys.. pls send me more infos.. you could pm me if its a secret.. thanks again.
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Old 11-26-2008, 06:55 PM   #1108
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the Silver can class is good, but its hard to get a motor that runs really well. And then when you do have a really fast motor, you need to make sure that you don't over gear it, otherwise, Poof! and there goes all your hard work.
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Old 11-27-2008, 06:45 PM   #1109
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its a johnson silver can with the soft brushes.. i dont think its not yet fully broken in.. i water dipped it and used it in several races.. anyways, im new at this silver can thing.. so maybe its not yet really broken in. hehehe!
thanks matt..

am starting to learn a lot of stuff about silver can from you guys.. pls send me more infos.. you could pm me if its a secret.. thanks again.
You have a PM. Just some stuff on water dipping and performance levels of stock Johnsons. Secrets I have, but that's why they're called secrets.
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Old 11-27-2008, 06:57 PM   #1110
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You have a PM. Just some stuff on water dipping and performance levels of stock Johnsons. Secrets I have, but that's why they're called secrets.
Awww, c'mon...share with us. Or more specifically, share with me.

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