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Old 03-17-2019, 10:10 PM
  #2431  
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Originally Posted by casrcr

Mine really came alive at 60+ and 4.69 on a track layout only slightly bigger. Temps 126.
USGT 90x48 track 4.4fdr, timing on can around 57* and it comes off cold. 4.5-4.6 and 60* should be perfect.
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Old 03-17-2019, 10:37 PM
  #2432  
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Originally Posted by Johnny Carey


hes running v2
oops very sorry. Old man can't read apparently
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Old 03-18-2019, 06:22 AM
  #2433  
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Originally Posted by theclutch
Hey guys, I'm running a XB2 carpet edition buggy which has a FDR 2.65. With a "The One" 17.5 (version 2), I'm running a 75/31 = 6.41 overall drive ratio. My question is, how do I know if the motor is "burnt out"? I'm running a fan and the motor just doesn't seem to heat up. I run on high bite carpet. Even when I set the timing to 50 or 55 degrees, I only get about 105F temp. And that's with me trying to find a hot spot with my temp gun. With this gear ratio, I feel like I don't have as much punch and doesn't seem as fast on the straights as other people's. My batteries are new Reedy 120C 7.6V 4900mah. I'm planning to take the motor out and put it back on my motor analyzer. The ootb result was 3163 kv @ 7.7volts, 24360 rpms, set at 46 degree timing and a 3.8amp draw. Other than me re-running the motor on the analyzer, is there any other to check if it's burnt out? Or any other suggestions? Thanks in advance.
On a motolyser set it for 58-60* and try dropping a few pinions. Maybe a 27-75 to start.
The V2 motors will build up temp, you just need to be in the RPM range for it to work.
I think you may have been over geared and under timed... thus no bottom end and no temp.
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Old 03-18-2019, 11:39 AM
  #2434  
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I was wondering what timing and starting FDR for a TSR 25.5 V3. Racing VTA on medium sized track 100X50.
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Old 03-18-2019, 11:54 AM
  #2435  
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Originally Posted by LarryN
I was wondering what starting FDR for a TSR 25.5 V3. Racing VTA on medium sized track 100X50.
I ran over the weekend... I tried 57* and a 5.0FDR on a 90x50 track.
Infield was really really good, coulda used a bit more top end, but only ran 115* with .1 fade.

If the track is technical and high traction that may be a good spot to start.
If it's flowing and more open, try less timing, 52*- 54* or so and add some gear.. maybe 4.8 to start

These numbers are motolyser numbers, not can numbers

The lowest I ran FDR was 4.0 that was with 46* of timing
It had alot of top end and good infield, but dropped off last minute (.3 fade).
Motor temps got up in the 130*F range.
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Old 03-18-2019, 05:45 PM
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Originally Posted by sg1
On a motolyser set it for 58-60* and try dropping a few pinions. Maybe a 27-75 to start.
The V2 motors will build up temp, you just need to be in the RPM range for it to work.
I think you may have been over geared and under timed... thus no bottom end and no temp.
Here's a plot of my 17.5 V2. It would appear that the "sweet spot" is likely in the 48 degree range. I.e. - where the amp draw starts to spike with no equivalent rise in KV. Would you agree? I am thinking I "set it and forget it" here and then gear up/down accordingly. I'm not an expert at these things (just a tinkerer) so I appreciate any constructive feedback.
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Old 03-19-2019, 04:58 AM
  #2437  
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Originally Posted by theclutch




Here's a plot of my 17.5 V2. It would appear that the "sweet spot" is likely in the 48 degree range. I.e. - where the amp draw starts to spike with no equivalent rise in KV. Would you agree? I am thinking I "set it and forget it" here and then gear up/down accordingly. I'm not an expert at these things (just a tinkerer) so I appreciate any constructive feedback.
A dyno is a great tool...but... not all the time does it tell you what you need to know.
I like to use it as a reference. Once I find something on the track that is working I can put it on it and see what the motor is really doing.
There are many times I find something that is working and then put it on the dyno and have very low torque, power, and eff. but with the correct gear it's faster.
And visa versa... I put it on and see there's nothing..lol... (very low timing) but with a few extra pinions it's spot on ... lol...

Give it a try where it's at and try different gears..
Then... add timing and do the same process with gears.
There's a sweet spot in gearing for each motor set up.. some are just better then others for that day
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Old 03-19-2019, 07:14 AM
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Originally Posted by sg1
A dyno is a great tool...but... not all the time does it tell you what you need to know.
I like to use it as a reference. Once I find something on the track that is working I can put it on it and see what the motor is really doing.
There are many times I find something that is working and then put it on the dyno and have very low torque, power, and eff. but with the correct gear it's faster.
And visa versa... I put it on and see there's nothing..lol... (very low timing) but with a few extra pinions it's spot on ... lol...

Give it a try where it's at and try different gears..
Then... add timing and do the same process with gears.
There's a sweet spot in gearing for each motor set up.. some are just better then others for that day
Amen to THAT! 👍
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Old 03-19-2019, 09:25 AM
  #2439  
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Originally Posted by sg1
I ran over the weekend... I tried 57* and a 5.0FDR on a 90x50 track.
Infield was really really good, coulda used a bit more top end, but only ran 115* with .1 fade.

If the track is technical and high traction that may be a good spot to start.
If it's flowing and more open, try less timing, 52*- 54* or so and add some gear.. maybe 4.8 to start

These numbers are motolyser numbers, not can numbers

The lowest I ran FDR was 4.0 that was with 46* of timing
It had alot of top end and good infield, but dropped off last minute (.3 fade).
Motor temps got up in the 130*F range.
Thank you. I will try your recommendations!!
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Old 03-20-2019, 10:03 AM
  #2440  
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Hey Guys,

John and I will be heading up to Canada today.
I'll be checking in a few times a day
If you're at the race stop by and say "HI" !

-Wayne
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Old 03-25-2019, 09:37 AM
  #2441  
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Got a chance to do a couple practice runs with the 25.5 in VTA and wow. Ran a 4.56 but seemed it lagged on the infield. Switched to a 4.8 and it did better. Going to a 5.0 gear wouldn't match up with my spur. Ordering a bigger spur to compensate and will see. Lap times were really consistent.
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Old 03-25-2019, 10:47 AM
  #2442  
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Originally Posted by LXtacyDriver
Got a chance to do a couple practice runs with the 25.5 in VTA and wow. Ran a 4.56 but seemed it lagged on the infield. Switched to a 4.8 and it did better. Going to a 5.0 gear wouldn't match up with my spur. Ordering a bigger spur to compensate and will see. Lap times were really consistent.
What did you run for timing?

I just got back from the Canadian Nats, BIG track!, I ran 57* with big ballooned tires at a 4.99 FDR

On a track 80x50 I run that timing at a 5.14 FDR
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Old 03-25-2019, 04:01 PM
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Whatever it was set at from ya'll. I usually leave that along.
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Old 03-26-2019, 06:52 AM
  #2444  
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Originally Posted by LXtacyDriver
Whatever it was set at from ya'll. I usually leave that along.
If you ordered a "The1" a sheet shoulda came with it with the settings.
50* is the typical set point.

First off... what size track are you on and is it indoor or outdoor?

From there we can guess a better starting FDR and timing
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Old 03-26-2019, 08:01 AM
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Indoor on road 75x40
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