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Old 12-23-2014, 10:59 AM   #466
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I really like these motors but they are not perfect. Had a 17.5 with a bad phase out of the box last week.

Dremeling the timing plate will get you more timing for onroad. These motors have little timing built in, but very torquey and friendly to novice. Also heard a Reedy timing board pops in and gives a static timing boost so you can avoid getting the dremel out.
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Old 12-23-2014, 12:06 PM   #467
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Quote:
Originally Posted by Troy Carter View Post
3.9 isn't enough gear for boosted. Start around 6:1 and add boost to your liking. You may be able to go lower but I would start there for boosted and work my way down if I was running 21.5.
For F1 4.0 is right for 21.5 boosted starting point. At 6:1 the motor will top out almost immediately on the straight. With the torque there will be a lot of wheel spin in the twisty bits.

Without boost, on rubber tires we were running the same motors @ 2.75 to 3.25 FDR and they're coming off under 130 without fans. The only thing I can think of is that the light weight of the car decreases the amount of torque required from the motor to make it go.

I have another on order for my CRC WTF-1.
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Old 12-23-2014, 12:09 PM   #468
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I run the 21.5 in my USGT car (no boost) on a 90x40 carpet track. I gear between 3.4 and 3.6 FDR. Its never been over 130 with a fan. Good motor.
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Old 12-23-2014, 04:07 PM   #469
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I've been running this in my usgt and had the fan fall off but the motor only came off at 150F after 8 min. 3.5fdr. Usually with a fan it's been coming off at 120-130F.
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Old 12-23-2014, 04:15 PM   #470
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very good motor and very cheap too!
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Old 12-23-2014, 06:34 PM   #471
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I've been using the 21.5 in my F1 for almost two years now and it's been great.
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Old 12-23-2014, 07:14 PM   #472
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How do you adjust the timing. I have undone the 3 screws and i cannot move it even a mm. Any hints guys and girls?
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Old 12-23-2014, 07:52 PM   #473
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sometimes they are pretty tight. i had to use a set of pliers and a piece of cardstock to protect the finish to get it to turn.
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Old 12-23-2014, 08:03 PM   #474
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Thanks so much for the reply, worked perfectly. I just didnt want to get too forceful with it without asking, incase i broke something.
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Old 12-23-2014, 08:11 PM   #475
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Timing at zero is 19-20 degrees. Max timing was at 30-31 degrees on my tester.
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Old 12-23-2014, 08:41 PM   #476
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Quote:
Originally Posted by Madulla View Post
Timing at zero is 19-20 degrees. Max timing was at 30-31 degrees on my tester.
No wonder people say it is fine to just crank the timing on these motors.
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Old 12-23-2014, 08:57 PM   #477
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I have a Trackstar 17.5 in my buggy and a 13.5 in my tourer, pleased with their performance but I find they both run hot. Finish a 6m buggy run on a warm day and the temp is around 75c with stock timing. If I switch it to my Speed Passion 17.5 and do the next race the temp is around 55-60c (stock timing as well). 2wd rear mount buggy so there is no way to mount a heatsink or a fan..
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Old 12-24-2014, 02:11 AM   #478
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Hobbyking has now released another 540 size brushless car motor called the "Hobbyking X-Car"

http://hobbyking.com/hobbyking/store...r_1489Kv_.html




The kv ratings are lower than the Trackstar counterparts, and a little bit more expensive, wonder if they'll submit them for ROAR approval as well.

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Old 12-24-2014, 07:31 AM   #479
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Interesting. Will have to look into these.
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Old 12-24-2014, 07:45 AM   #480
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Quote:
Originally Posted by Flanker View Post
I have a Trackstar 17.5 in my buggy and a 13.5 in my tourer, pleased with their performance but I find they both run hot. Finish a 6m buggy run on a warm day and the temp is around 75c with stock timing. If I switch it to my Speed Passion 17.5 and do the next race the temp is around 55-60c (stock timing as well). 2wd rear mount buggy so there is no way to mount a heatsink or a fan..
You might need to go a tooth smaller on the pinion with the trackstar motor.
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