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Old 03-08-2014, 08:00 PM   #1
UroGator
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Default 48 Volt TXT PDS conversion-WOW!

So I've been luring around for a bit and learned a lot in the process. Thanks for everyone's knowledge and input. I started by purchasing a 2006 EZGO TXT PDS just to drive around the neighborhood and golf as well. One battery was shorted and I replaced just the one bad one before I learned that was a bad idea. I went to lift up the old battery and found the entire battery tray to be eaten away by the acid and replaced the tray with a new one. Well one thing led to another, and I decided to do 48 volt conversion, buy new wheels, upgrade brakes, and make it street legal. I was officially bitten by the bug.

My first upgrade when I bought the cart was the Freedom mode plug. This got me to 18 MPH on 18" tall 205/50/10 tires. I needed more speed. Was reading threads about the Alltrax DCX400 controller upgrade on stock 36 V and saw mixed reports of getting up to 23-25 MPH in some instances, and 19-22 MPH in other instances. I didn't want to spend the money on the controller, only to get a couple more MPH than a $5 Freedom plug got me. So I decided to convert to 48V. Let me tell you- this conversion is no joke. Results are night and day. I know it is supposed to be 30% more torque, but it really feels like 50-75% more torque to me. Slight uphill inclines no longer slow the cart down to a crawl. Before the conversion, I felt like getting up to speed in a Prius. Now, when I mash on the gas, you better hold on or you may fall out. Acceleration is more like a Tesla. The front wheels feel like they will lift off the ground. Max speed is 30 MPH now measured by GPS and I can probably go faster downhill (but don't want to find out what would happen as JohnnieB did with his motor). Going up slight inclines at speed only brings me down to around 27 MPH.

For anyone on the fence about a 48 V conversion. Don't even think twice. Just do it. You won't regret it. If you are in the market for new batteries, just convert to 48V. I can't imaging wanting to go much faster in a golf cart. Just wouldn't feel safe to me.

Hope this helps someone make up their mind!
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Old 03-08-2014, 08:39 PM   #2
derkoldoo
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Default Re: 48 Volt TXT PDS conversion-WOW!

wow is the word!!!! can u tell me what all you had to buy, and what all you had to do to convert. you did convert from 36v to 48v ,right?
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Old 03-08-2014, 08:43 PM   #3
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Default Re: 48 Volt TXT PDS conversion-WOW!

I bought 6 new 8 V batteries (Deka), set of new 4 gauge cables (replaced all 10 high amp cables), Alltrax DCX400 PDS controller, 48 V solenoid, diode and resistor, and a 48 V DPI charger to get the speed and torque I have
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Old 03-08-2014, 08:44 PM   #4
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Default Re: 48 Volt TXT PDS conversion-WOW!

Oh, and new 215/35/14 wheels as mentioned in my signature
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Old 03-09-2014, 06:45 AM   #5
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Default Re: 48 Volt TXT PDS conversion-WOW!

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Originally Posted by UroGator View Post
Oh, and new 215/35/14 wheels as mentioned in my signature
According those numbers, your tires are 19.9" tall, so you motor spins at about 6300 RPM at 30 MPH, which is okay.

However, the numbers printed on the tire's sidewall is a group size rather than the actual dimensions and may be over an inch off in height and if your tires are only 19" tall, your motor is spinning about 6600 RPM at 30 MPH, which might be pushing it a bit.

The best way to find out the dynamic tire height is to place a chalk mark at the bottom-center on the side of the tire where rubber meets road and and on the road. Drive the cart until chalk mark on tire is bottom-center again (about 5 feet) and mark the road. The distance between the two chalk marks on road is the circumference of the tire, so divide the by Pi (3.141593) and you have the tire height.
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Old 03-09-2014, 08:33 AM   #6
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Default Re: 48 Volt TXT PDS conversion-WOW!

If you don't have any caulk handy the internet works good. go here or any of several other tire size calculator sites http://tire-size-conversion.com/tire-size-calculator/
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Old 03-09-2014, 09:04 AM   #7
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Default Re: 48 Volt TXT PDS conversion-WOW!

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Originally Posted by scottyb View Post
If you don't have any caulk handy the internet works good. go here or any of several other tire size calculator sites http://tire-size-conversion.com/tire-size-calculator/
Just measuring from side to side (or top to bottom) with a yard stick will get you a more accurate height then calculators that use the size stamped on the tire's sidewall. The calculators are only as good as the information put into them and the size information on the tire isn't very close in many cases.

For example, Carlisle gives MTD (Mounted Tire Diameter - which is close to, but not the same a dynamic tire height) on their website and they list the MTD of their 18X8.50-8 Links tire (which is the stock tire for many carts) as 17.4", while the MTD of a 18X8.50-8 Turf Master tire is 18.3". Same size stamped on the tire, but nearly an inch difference in height.

Links: http://www.carlisletransportationpro...arden-golf/Ti5
Turf Master: http://www.carlisletransportationpro...rden-golf/Ti15

---------
In most cases it doesn't matter much, but when you are getting close the the max RPM for the motor, an inch or so makes a difference.
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Old 03-09-2014, 09:06 AM   #8
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Default Re: 48 Volt TXT PDS conversion-WOW!

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Originally Posted by UroGator View Post
Oh, and new 215/35/14 wheels as mentioned in my signature
Forgot to ask earlier, what is the Max inflation pressure stamped on tire.
What pressure are you running them at?

Also notice you have 19.5" as the tire height in your sig block, was that just added, or did I miss it before?

Last edited by JohnnieB; 03-09-2014 at 09:10 AM.. Reason: another question
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Old 03-09-2014, 09:12 AM   #9
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Default Re: 48 Volt TXT PDS conversion-WOW!

so urogator,what tire size would de ideal for this setup?
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Old 03-09-2014, 09:28 AM   #10
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Default Re: 48 Volt TXT PDS conversion-WOW!

Ideal is all a relative term. The larger the diameter tire and wheel setup you have, the more speed you will get as you effectively change the final drive ratio. For the stock gears in the tranny, you gain about 1 MPH of top end speed per inch increase in size over stock diameter wheel/tire combo. If you are upgrading wheels and are looking for max speed go for larger overall diameter.

In my case, I am not looking for "off road" look. I prefer the sporty appearance of low profile tires on larger wheels. So I went with 215/35/14
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