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Unread 06-04-2018, 11:51 AM   #21
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Default Re: Scootyb,Johnnieb and yurtle? loss of torque checklist.

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Originally Posted by rsw007 View Post
Johnnie I believe it was 37.8or 37.7 just before hill climb. Rest voltage now 3+ hours later is 38.1.
Thanks, I was looking for a significant voltage loss between batteries and controller. Doesn't appear to be one.

Have you tried clearing the throttle auto-cal to see if it'll go from 0-100% like it ought to?
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Unread 06-04-2018, 05:03 PM   #22
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Default Re: Scootyb,Johnnieb and yurtle? loss of torque checklist.

deleted auto cal and recalibrated 3 times and keep getting 93-96 %. so did a custom linearization where anything above 90 is 100.


new test run. start batterypack voltage per my digital gauge on dash which always matches all three of my flukes. was 37.7
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Unread 06-04-2018, 06:21 PM   #23
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Default Re: Scootyb,Johnnieb and yurtle? loss of torque checklist.

1.5 hours later rest voltage 37.9v
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Unread 06-04-2018, 07:09 PM   #24
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Default Re: Scootyb,Johnnieb and yurtle? loss of torque checklist.

Looks like you are getting 100% throttle now.

Battery voltage (at controller) dropped to 30.4V when 296.8A was being drawn, which is about 2.5V/100A, so the amp delivery system (High current cables, connections and contacts) is in pretty good shape.

Acceleration is likely to improve as batteries are broken in. Might get a whisper more top speed since voltage drop under load won't be quite as much.

Hint: When measuring top speed for bragging rights.
Accelerate slowly to top speed. A Jackrabbit start drops the pack voltage and top speed is determined by pack voltage.
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Unread 06-04-2018, 08:19 PM   #25
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Default Re: Scootyb,Johnnieb and yurtle? loss of torque checklist.

Ok thanks for all the help Johnnie. Do you think I should still upgrade the 4ga motor cables to 2ga?
I've also thought about the new style txt fnr contactors.

I plan to call Dana Spicer and get gear oil recommendations for the 16.1 diff. Currently have a very thick diff oil in rear.
Thanks again
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