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R1 Wurks brushless motors

Old 06-09-2017, 04:59 PM
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jorge - i'd recommend you check up to 60 degrees. R1 motors love timing
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Old 06-09-2017, 06:48 PM
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Originally Posted by hanulec
jorge - i'd recommend you check up to 60 degrees. R1 motors love timing
I'll give it a shot when I get the 17.5 V16.
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Old 06-20-2017, 05:03 AM
  #303  
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Saw a V16 13.5 running tonight at my local track and the thing is a weapon. Was almost like a mod motor lol. Strong acceleration and great top end. Well balanced motor looks like.
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Old 06-20-2017, 09:57 AM
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Originally Posted by hanulec
jorge - i'd recommend you check up to 60 degrees. R1 motors love timing
I tested at 60 mark.

Results were not good.
Amps went to the roof and made no power/torque.

At 60 timing it at Austin in late August the motor will cook.

I have tested 2 17.5 V 16 and 3 21.5 V16 so far.
The 17.5 and 21.5 motors make roughly the same power between 40 and 50 mark (38-46 measured). With lower timing being more efficient.

These results will vary slightly motor to motor.

I have 2 more 17.5 to do.
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Old 06-20-2017, 01:50 PM
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I did a proof of concept this past weekend to work around Jorge's findings over at out local asphalt track. I can say that the results on track seem to follow the findings with the Dyno.

I had a v16 set up at 52 deg (actual timing) and had worked on the gearing and timing for a full day. I felt like the set up was solid and I agreed with Hanulec's statement that the motor liked timing. Once I got to 52 the motor seemed to come alive for me. Temps were a bit high, so I felt like maybe coming down a tooth would have been beneficial.

After setting the motor up with Jorge's help with his Dyno, we found that the motor made the most power and efficiency at around 30 degrees. So, in an effort to see what the results would be, I calculated the wheel speed of the car with 52 degrees of timing and the ratio I was running it and I did a conversion for it at 30 degrees.

The result was actually surprising. The car felt every bit as fast, and perhaps it had a little bit less drop off. The timer was not on so I was just going by feel, but I can say that it was at least as fast as it was with higher timing. I did not have a temperature gun with me, so I could not test the temperature of the motor, but I do know that it seemed like the power stayed more consistent through the run. The motor still ran hot, but again, it's Texas, it's a long track and the ambient temps were in the low 90's.

I will certainly do more thorough comparisons going forward, but I remember John Stranahan always saying that the watt number along with efficiency are the 2 numbers that matter most. You gear the motor to run well at the point where it makes the best combo of power and efficiency.
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Old 06-20-2017, 03:04 PM
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After setting the motor up with Jorge's help with his Dyno, we found that the motor made the most power and efficiency at around 30 degrees. So, in an effort to see what the results would be, I calculated the wheel speed of the car with 52 degrees of timing and the ratio I was running it and I did a conversion for it at 30 degrees.
Cristian, can you go thru the process used to do this conversion? Thanks
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Old 06-20-2017, 03:15 PM
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Copied from the PM I sent Gary:

All I did was take the Peak RPM from the Dyno and divided by the ratio.

Peak RPM with 52* was around 9200-9500, don't remember exactly.

So I did 9200/3.65= 2520 RPM at the wheel

Then I took the peak RPM of the motor at max output (around 30 deg mark) which was 8400 rpm or so. So I solved for the ratio:

8400/2520 = 3.33. This is what I geared at.


This should be close to equivalent top speed for the motor at the setting I was at before. Not saying it was the ideal ratio, but it was as close to running the same load on the 2 different settings. I have a feeling I am still overgeared as the motor runs hot on both settings. Our straightaway is 200+ ft though and surprisingly the speed no longer feels like a hindrance with a 17.5. It is actually more enjoyable than mod at Porter on a practice day as the grip is kinda low and the car does not get beat up as much on the bumpy surface. I think we have officially achieved the perfect speed with 17.5 to get the power/enjoyment ratio just right for experts and sportsmen alike. Reminds me of the old 19t turn days.
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Old 06-20-2017, 09:20 PM
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Anyone know when v16 17.5 will be available.
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Old 06-20-2017, 09:39 PM
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How does the V16 17.5 compare to the rest of the competition in 1/12?
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Old 06-21-2017, 08:18 AM
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Originally Posted by Micah123
Anyone know when v16 17.5 will be available.
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Old 06-21-2017, 09:50 AM
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Originally Posted by Micah123
Anyone know when v16 17.5 will be available.
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Old 06-22-2017, 05:42 PM
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Jorge and Cristian, Could you recommend Gearing for TC with the 25.5 for Texas Heat? My v16 25.5 came at 30 degrees of timing on the can and it is 21 on the motorlyser. Any help would be greatly appreciated.

Ronnie

Last edited by picco007; 06-22-2017 at 05:54 PM.
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Old 06-24-2017, 03:07 PM
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Originally Posted by picco007
Jorge and Cristian, Could you recommend Gearing for TC with the 25.5 for Texas Heat? My v16 25.5 came at 30 degrees of timing on the can and it is 21 on the motorlyser. Any help would be greatly appreciated.

Ronnie
Run it at 30 degrees on the can like it came.

You may need to test 3.4 to 3.2 or lower FDR.
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Old 06-24-2017, 10:36 PM
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Originally Posted by picco007
Jorge and Cristian, Could you recommend Gearing for TC with the 25.5 for Texas Heat? My v16 25.5 came at 30 degrees of timing on the can and it is 21 on the motorlyser. Any help would be greatly appreciated.

Ronnie
I tried the 25.5 at 30 on endbell(got to check timing with motolyser) and my F1 was spinning the rear tires on black carpet. I went up 5 teeth on pinion and the car was a missile and rear wheel spin stopped plus motor barely warm.
1st day trying this new gearing so I will try some different spur and pinion combo's in future to further explore this interesting timing setting.
hope this helps
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Old 06-25-2017, 12:38 AM
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Originally Posted by Jorge T
Run it at 30 degrees on the can like it came.

You may need to test 3.4 to 3.2 or lower FDR.
Thank you Jorge! I will test very soon!

Ronnie
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