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Old 12-31-2007, 09:22 AM   #616
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I have a question about temp: When we are taking a temp reading from the outside (can) of the brushless, are the rotor temps higher or lower? As the rotor is the magnets, correct?
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Old 12-31-2007, 09:25 AM   #617
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AFAIK Higher.
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Old 12-31-2007, 10:58 AM   #618
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1) The best place to temp a motor is simply wherever you get the highest reading. Most of the time it'll be on the motor to motor mount junction since the sensor based motor windings are terminated at the front of these motors. (This is where the ".5" of the 13.5t motor designation comes from) Otherwise, the back of the can aiming at the rotor/bearing assembly is a good place too.

2) Motor hear comes from two different sources, so lets compare two different motors/traction situations to look at it:

A. If you had a 13.5 motor on a long flowy asphalt track with limited bite, almost all the motor heat is generated by the motor windings themselves which are just inside the can. The rotor (magnet on a shaft) itself would be generating almost no heat by/on itself and is warm just by being near the windings. The ESC is hitting the windings with current, and their resistance is causing the heat. The more current, the more heat on the windings.

B. If you had a 2.5 motor on a tight technical hi bite carpet track, again the widings would be warm as they always are, but the rotor can generate it's own internal heat in this situation as well. The rotor may well be hotter than the outside of the can, but you can still temp it accurately by hitting the back center of the can. In this situation, the best way I can describe why the rotor itself is heating up without going into a lot of physics theory, is by "magnetic friction". The windings are acting on the magnet in order to turn it, and the motor is being asked to generate a tremendous amount of torque. High current loads trying to move/accelerate the magnet faster than the drivetrain wants it to move causes this "magnetic friction" and the electromagnetic forces pulling on the magnet are actually heating the rotor magnet itself directly.
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Old 12-31-2007, 11:56 AM   #619
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Good info there Shawn
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Old 12-31-2007, 06:10 PM   #620
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I've decided not to run the fan on the speedo; what are the rest of you doing?
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Old 12-31-2007, 06:14 PM   #621
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Quote:
Originally Posted by JayBee View Post
I've decided not to run the fan on the speedo; what are the rest of you doing?
w/ 10.5 I dont even bother...its not really needed even in Florida type weather IMO...maybe a clamp-on heat sink is all I'll ever put on if it strats getting too hot, maybe...
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Old 12-31-2007, 06:33 PM   #622
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Quote:
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w/ 10.5 I dont even bother...its not really needed even in Florida type weather IMO...maybe a clamp-on heat sink is all I'll ever put on if it strats getting too hot, maybe...
U GOT A PM
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Old 12-31-2007, 06:46 PM   #623
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I'll be back at the track tomorrow, my SP9.5R/LRP TC Spec has skewed my driving a bit. The GT is so damn smoooth w/the 10.5R that I couldn't get the car to shake loose LOL. What was surprising is that my lap times only suffered a tad from my 9.5R times....I'll see what tomorrow brings

The timing REALLY affects battery performance too. Is #6 & #7 w/the AMTS normal operating parameters?
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Old 12-31-2007, 06:46 PM   #624
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Quote:
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U GOT A PM
Pm replied...you're wheeling and dealin'
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Old 12-31-2007, 06:49 PM   #625
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Quote:
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The timing REALLY affects battery performance too. Is #6 & #7 w/the AMTS normal operating parameters?
Check post #597 a page back
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Old 12-31-2007, 08:37 PM   #626
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installed my speedpassion stuff last night (GT/10.5) and ran it today and i am very happy with it, the GT is so smooth yet still has the punch i like. ran the first couple of times on foam tires, and carpet was "funny" today and i chunked a couple of new tires so i am now officially done with foams, to much darn work. slapped on a set of sorex 28's (spec tire for series racing) and loved it. a couple of guys were playing so i went out with them and car and speedpassion system was awesome.
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Old 01-01-2008, 12:48 AM   #627
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So so far everyone thinks the SP esc, and motors are the way to go?

I use a orion/LRP combo now, but the SP esc is just too awesome, and the motor sounds nice too
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Old 01-01-2008, 12:51 AM   #628
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hey where can we get a price list of all the speed passions gear schumacher usa will be selling? im looking at going sp but am un sure of what they offer. like to know about accesorys to (wire caps diodes plugs heatsink etc)
so any list would be appreciated
cheers josh p
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Old 01-01-2008, 06:37 AM   #629
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This should help

http://www.kinggolden-rc.com/speedpassion.html
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Old 01-01-2008, 08:37 AM   #630
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Alright....Where can I get a Granturismo esc. After some brief reading I think I need one......
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