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Old 03-18-2013, 10:03 AM   #601
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Anybody install a 13mm rotor in a 17.5t?
That rotor is not legal to use in Spec class.
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Old 03-18-2013, 10:43 AM   #602
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how did it go? Any fdr suggestions for outdoor?
Very well! I've only run it on a medium indoor carpet track and ended up at 3.9fdr with 38 degrees of timing. For reference I ran a d3.5 at 3.8 and max timing.
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Old 03-18-2013, 10:54 AM   #603
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Ran the 17.5 mach2 for the first time in my 1/12th. Motor seems to have excellent rip... I don't think I have found the sweet spot yet, but it was running good @ a hair less than max timing and ~94mm roll out. Temp. 158 after the main.
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Old 03-18-2013, 10:57 AM   #604
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Ran the 17.5 mach2 for the first time in my 1/12th. Motor seems to have excellent rip... I don't think I have found the sweet spot yet, but it was running good @ a hair less than max timing and ~94mm roll out. Temp. 158 after the main.
might try..
less timing more roll
more torque, less fade

90x45 high grip rug 105mm 40 timing
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Old 03-18-2013, 11:26 AM   #605
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might try..
less timing more roll
more torque, less fade

90x45 high grip rug 105mm 40 timing
Thanks! Will give it a try!
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Old 03-18-2013, 09:28 PM   #606
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Default sonic motor help

My sonic motor powered car took a huge tumble and immediately sounded like the gear mesh had gone bad and it would not go so I pulled in into the pits and reset the mesh. But the motor still would not turn and it was hot so I just stopped.
Tonight I pulled the motor out of the chassis and inspected it and found the motor timing plate was rotated about 90 degrees, way past the timing marks. I just used my fingers and was easily able to rotate the back plate to bring it back to the zero mark and the motor now runs, but it sounds horrible and even worse, as I watched the vibration started moving the timing plate. It seems the set screws were not holding the timing plate in position. I have tightened them with screwdriver and they are holding position but the motor still has the horrible howling sound.
Any suggestions? Do I need a new bearings? A new rotor? A new sensor board?
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Old 03-19-2013, 10:08 AM   #607
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Edit: Thought I knew your issue... but it started doing this after it was already working fine? This isn't a fresh install is it? I thought you might have wired your motor wrong.
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Old 03-19-2013, 10:21 AM   #608
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Originally Posted by RedBullFiXX View Post
might try..
less timing more roll
more torque, less fade

90x45 high grip rug 105mm 40 timing
This.

The motor seems to work best for me around 38-40 degrees, 102-104mm depending on layout. It does seem very sensitive to timing changes, however. I have seen 1.5-2 degrees result in 1.5 tenths gain/loss in fast lap.
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Old 03-19-2013, 10:28 AM   #609
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This.

The motor seems to work best for me around 38-40 degrees, 102-104mm depending on layout. It does seem very sensitive to timing changes, however. I have seen 1.5-2 degrees result in 1.5 tenths gain/loss in fast lap.
I ran a Reedy 17.5 at carpet nats (as James knows). ~103.5mm rollout, 40 deg of timing. Stock rotor. I missed the A by .002 of a second and fast lap was less than a tenth off-pace, so it was p close.
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Old 03-19-2013, 10:37 AM   #610
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edit - deleted
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Last edited by samnelso; 03-19-2013 at 10:38 AM. Reason: too mean
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Old 03-19-2013, 10:40 AM   #611
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I ran a Reedy 17.5 at carpet nats (as James knows). ~103.5mm rollout, 40 deg of timing. Stock rotor. I missed the A by .002 of a second and fast lap was less than a tenth off-pace, so it was p close.
I wasn't sure if you ended up where we were talking about... glad to see that it worked out well, though!

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Edit: Oh come on Sam... that was funny! But let the record show that I was not the first person to bring it up!
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Old 03-19-2013, 11:05 AM   #612
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I have been crying myself to sleep every night, and you guys gotta go and rub it in. two thousandths.
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Old 03-20-2013, 12:18 AM   #613
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Does anyone know when the mach 2 is going to be roar approved?
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Old 03-20-2013, 02:09 AM   #614
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Does anyone know when the mach 2 is going to be roar approved?
its already approved
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Old 03-23-2013, 12:13 PM   #615
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Default 21.5 2wd buggy

Any ideas how to get more speed out of a 21.5t in Blinky with FDR is set at max 6.0
a couple other racers are far quicker top end than mine..I have tried 45 degree timing. motor temps are only aroung 50-55 degree celcius. TLR22 2WD offroad buggy...
Cheers
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