Speeding up PDS, Battery Voltage

[tmbrown89]

Hey all,

I would like to see what kind of speed I can get with my stock PDS.
I have the speed wire installed but it doesnt seem to make a difference.
Is there anything I can do to speed it up?

Also, I installed a LED digital battery meter.
What should the voltage be fully charged and also when it needs to be charged?

I will post pics of the cart soon.

[JohnnieB]

Originally Posted by tmbrown89

Hey all,

I would like to see what kind of speed I can get with my stock PDS.
I have the speed wire installed but it doesnt seem to make a difference.
Is there anything I can do to speed it up?

Also, I installed a LED digital battery meter.
What should the voltage be fully charged and also when it needs to be charged?

I will post pics of the cart soon.

You have to flip the Run/Tow switch to Tow and then back to Run for the controller to change PDS modes. However, you should have flipped it to Tow when you installed the speed chip.

To find out what PDS mode the controller is in, count the beeps when you put it into diagnostic mode. The text at the bottom of the attached PDS label tells you how to get in diagnostic mode and the other chart is the speed and regen braking levels for the four PDS modes.

If you replace the stock controller with an aftermarket one that doesn't limit motor RPM like the stock PDS controller does, you with get 20+ MPH.

I'm expecting in the mid 20's with the 42V system I'm putting together.

---------------
A fully charge 36V battery pack will read 38.2V about 12 hrs after the charge automatically shuts off.
Batteries ought to be recharged after each use, no matter how slight.

Here is a State of Charge vs Voltage chart. Voltages given are 12 hours after charger turns off, or about 15 minutes after batteries have been in use.

Never allow batteries to discharge lower than 50% SoC (36.3V) or load them down to less than 1.75V per cell (31.5V for a 36V pack) while driving.

[tmbrown89]

Thank you Johnnieb for the info.

Will this help with the motor braking as well?

Also how many beeps should I get to know this in in freedom mode?

[JohnnieB]

Originally Posted by tmbrown89

Thank you Johnnieb for the info.

Will this help with the motor braking as well?

Also how many beeps should I get to know this in in freedom mode?

Here's a chart showing the various PDS mode plugs, and the number of beeps for each.

You only get motor braking when you take your foot off the pedal in the Mild and steep hill modes.

[tmbrown89]

Great, Thank you so much for your help.

Where would be the best place to get a 400amp controller?

BTW do you have your cart finished yet?
If so, do you have any pics?

[tmbrown89]

Would you know anything about lowering the cart?

I have 12" rims with low pro tires but I think there is too much of the fender wells showing.

Thinking of dropping it 2" without airshocks.

I have read about people blocking the rear axel and flipping the front springs.. Do you think this would work?

[JohnnieB]

Originally Posted by tmbrown89

Great, Thank you so much for your help.

Where would be the best place to get a 400amp controller?

BTW do you have your cart finished yet?
If so, do you have any pics?

I got the 808B package (the "B" is for the super-duty solenoid) that Scottyb at Carts Unlimited sells.
I also got my 2Ga cables, DVM battery meter with bezel and DPI battery chargers (both a 36V and a 42V) from him as well as some other goodies.
http://www.cartsunlimited.net/Custom_Options.html

----------
No, cart isn't done yet. Got all the parts, but started too late in the fall, had some medical issues and now cold weather has set in.
Both existing 36V and new 42V battery packs are on float charge and I'm waiting for warm weather to make the switch.


Externally, the cart will look pretty much the same as it does now. Basically plain vanilla. (Pics in build thread linked to in my sig block)
Internally, there will just be a different controller and solenoid plus a seventh battery in front of driver's side wheel well.

[tmbrown89]

Nice,

What would I need to do to convert mine to a 48v?

I plan on it sometime next year but I was thinking about just putting a battery box on the back for 2 more 6v or just changing out the whole pack.

[JohnnieB]

Different controller and solenoid.

You can replace the 6x6V battery pack with a 6X8V one or go to 8x6V by adding two more 6V batteries someplace.
Some people have managed to put eight 6V batteries under the seat, but it takes some shoehorning to it.

You will get the greatest run-time with 8x6V and the batteries will last longer before the have to be replaced also.

I went with 7x6V because they all fit under the seat without any relocating anything.

I also didn't slam the door on 48V down the road if needed. Both the controller and solenoid I pickled will work with any voltage from 36 to 48 volts and the 42V DPI battery charger can be converted to 48V by changing one board.

My goal is range rather than speed, but I will be getting more speed as well.

[tmbrown89]

Hey johnnieb can you help me. I seen this post and need help understanding the ITS.


Re: 2008 EZGO PDS Cart
Quote:
Originally Posted by JohnnieB
In your first post you stated you've checked the ITS (Hopefully, you verified the ITS voltage to the controller was in specs) and replaced the Speed Sensor in the motor.
Soon after I got my buggy, I adjusted the plunger in the ITS using a drill bit to get the proper distance, with info located somewhere in the stickies. If I recall, you also have to adjust when the micro engages. Once I did that, I got a noticeable speed improvement, as the controller was never told by the ITS to go to 100%.