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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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07-06-2018, 10:23 AM | #1 |
Not Yet Wild
Join Date: Aug 2015
Posts: 5
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Speed disappointment, what to do?
I currently have a 2000 TXT series cart that has been converted to 48 volt. It has an Alltrax SPM 48500, 400 Solenoid, HD F&R, and 2 GA wires throughout. Tires are 23x10.5x12 at 30psi. I have a Plum Quick Black Widow II 17.9 HP motor that is built for torque. The batteries were replaced last week with new Trojan T875s.
I am only getting 18mph on flat ground. Despite it being built for torque, it seems slow for all of these upgrades. Should I have faster speeds and if so, what do I need to check? |
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07-06-2018, 06:24 PM | #2 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,406
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Re: Speed disappointment, what to do?
You might want to get a speed motor. PQ has one. The high torque motors produce lower rpms.
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07-06-2018, 06:34 PM | #3 | |
Gone Wild
Join Date: Sep 2016
Location: Northern California
Posts: 1,300
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Re: Speed disappointment, what to do?
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07-06-2018, 07:36 PM | #4 |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Speed disappointment, what to do?
Without knowing the PQ motor's relative speed increase or decrease compared to a stock 2000 TXT series drive motor, there is no way of knowing if your setup is running fast, slow or normal.
In general terms, a series motor specifically wound for torque spins slower than a stock motor with the same voltage applied, so 18MPH may be normal. Contact PQ, give them your battery pack voltage, rear end gear ratio (probably 12.44:1) and tire height, and they might be able to answer your top speed question. |
07-06-2018, 07:49 PM | #5 | |
Gone Wild
Join Date: Sep 2016
Location: Northern California
Posts: 1,300
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Re: Speed disappointment, what to do?
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07-07-2018, 05:16 PM | #6 | |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: Speed disappointment, what to do?
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07-08-2018, 01:17 AM | #7 |
Gone Wild
Join Date: Sep 2016
Location: Northern California
Posts: 1,300
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Re: Speed disappointment, what to do?
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07-08-2018, 08:42 AM | #8 | |
Master of All Things
Join Date: May 2013
Location: West Columbia, Texas
Posts: 17,976
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Re: Speed disappointment, what to do?
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07-09-2018, 05:57 AM | #9 |
Not Yet Wild
Join Date: Aug 2015
Posts: 5
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Re: Speed disappointment, what to do?
I appreciate all of the responses! When I spoke with PQ, he stated I should be getting around 25mph. His suggestion was to increase tire pressure.
I would much rather have the torque considering it is primarily for hunting. Although I have nothing to base it on, I just thought I should be getting faster speeds. |
07-09-2018, 08:08 AM | #10 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,406
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Re: Speed disappointment, what to do?
Torque and speed are in constant trade off as the electric motor rpms increase.
Typically the motor produces the most torque at the lowest rpms and the highest speed at the greatest rpms. This all works well for cart operation because it doesn't take nearly as much power (torque) to keep a cart going 20 mph as it takes to get it rolling from 0 mph. Speed motors designed for high rpms produce less torque at all rpms than torque motors. You have chosen correctly. While a torque motor can be a little disappointing on the flat road. A speed motor will fail in most all off road situations. |
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