Need more toqure

71duckman · 04-10-2012, 06:24 AM

I have a 08 ezgo PDS model with a speed chip and new 23in tall tires. It works great on level ground but dies trying to go up any hills. The battery are fully charge it will run a half day on level ground. What will help the most to get more hill power.

hooknup · 04-10-2012, 07:39 AM

I have the same cart and same set up with large tires. I sent my motor off to plum quick and I should have it back by Thursday this week. I will let you know how it works out. I also have brand new batteries and seems like the run time is not very good.

scottyb · 04-10-2012, 08:23 AM

The tire is the final gear in the drive system. When you change the size from 18 to 23 inch tires you are changing the final drive ratio by about 30%. It is no wonder the cart falls on it face at the slightest hill.
The motor needs to be able to access more amperage. Amperage equals torque. A bigger speed control will allow the access and bigger cables will facilitate the delivery

Having the motor rewound for a little more speed will exasperate the problem.

71duckman · 04-11-2012, 08:58 AM

Thanks for that help, I was thinking about upgrading to a bigger speed control and motor. Does it make sence to change the motor to. Will i need to add more batteries with the speed controler upgrade.

scottyb · 04-11-2012, 09:19 AM

Quote:

Originally Posted by 71duckman

Thanks for that help, I was thinking about upgrading to a bigger speed control and motor. Does it make sence to change the motor to. Will i need to add more batteries with the speed controler upgrade.

You can do all the things you suggested but it is not needed to do it all at once.
You can upgrade the controller/solenoid combination and a few cables to increase torque and speed. (30%more torque and about 5mph more than freedom chip speed with upgrade pkg #80

.
All that on 36v. If you add 2 batteries and go up to 48v you should see an additional 30% increase in speed and torque.
If you upgrade the motor you can see increase in torque or speed depending upon which motor you get... there are a lot of choices.

JohnnieB · 04-11-2012, 09:26 AM

@ 71duckman:
Those 23" tires will give you about 24MPH with a stock controller and motor.
A 400A controller and good cables will get you back to about the torque level you had with stock height tires, but will reduce run-time.
(How much depends on how hilly it is and how heavy your foot is.

)
Going to 48V will give you more run-time and 8 X 6V will give you more run-time than 6 X 8V.

Monitor the motor temperature, if it is getting too hot, have Plumb Quick rebuild it.
----------------

@ hooknup:

New batteries only have about 75% of their max storage capacity. They have the be "Matured" to get 100%

Here is how to break them in Properly:
http://www.cartsunlimited.net/Batter...n_Methods.html

Run-time is also a function of the Amp-Hour rating of the batteries.
Trojan T-105 is the de facto standard with 225AH at the 20 hr rate.

04-10-2012, 06:24 AM	#1
71duckman Not Yet Wild Join Date: Dec 2011 Posts: 4	Need more toqure I have a 08 ezgo PDS model with a speed chip and new 23in tall tires. It works great on level ground but dies trying to go up any hills. The battery are fully charge it will run a half day on level ground. What will help the most to get more hill power.
71duckman Not Yet Wild Join Date: Dec 2011 Posts: 4

04-10-2012, 07:39 AM	#2
hooknup Not Yet Wild Join Date: Feb 2012 Posts: 46	Re: Need more toqure I have the same cart and same set up with large tires. I sent my motor off to plum quick and I should have it back by Thursday this week. I will let you know how it works out. I also have brand new batteries and seems like the run time is not very good.
hooknup Not Yet Wild Join Date: Feb 2012 Posts: 46

04-10-2012, 08:23 AM	#3
scottyb Happy Carting Join Date: Dec 2007 Location: Southern California Posts: 73,417	Re: Need more toqure The tire is the final gear in the drive system. When you change the size from 18 to 23 inch tires you are changing the final drive ratio by about 30%. It is no wonder the cart falls on it face at the slightest hill. The motor needs to be able to access more amperage. Amperage equals torque. A bigger speed control will allow the access and bigger cables will facilitate the delivery Having the motor rewound for a little more speed will exasperate the problem.

04-11-2012, 08:58 AM	#4
71duckman Not Yet Wild Join Date: Dec 2011 Posts: 4	Re: Need more toqure Thanks for that help, I was thinking about upgrading to a bigger speed control and motor. Does it make sence to change the motor to. Will i need to add more batteries with the speed controler upgrade.
71duckman Not Yet Wild Join Date: Dec 2011 Posts: 4

04-11-2012, 09:26 AM	#6
JohnnieB Techno-Nerd Join Date: Jun 2011 Location: West Virginia Posts: 19,654	Re: Need more toqure @ 71duckman: Those 23" tires will give you about 24MPH with a stock controller and motor. A 400A controller and good cables will get you back to about the torque level you had with stock height tires, but will reduce run-time. (How much depends on how hilly it is and how heavy your foot is. ) Going to 48V will give you more run-time and 8 X 6V will give you more run-time than 6 X 8V. Monitor the motor temperature, if it is getting too hot, have Plumb Quick rebuild it. ---------------- @ hooknup: New batteries only have about 75% of their max storage capacity. They have the be "Matured" to get 100% Here is how to break them in Properly: http://www.cartsunlimited.net/Batter...n_Methods.html Run-time is also a function of the Amp-Hour rating of the batteries. Trojan T-105 is the de facto standard with 225AH at the 20 hr rate.

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