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Old 06-28-2015, 11:34 AM   #1
papabeer
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Default 1995 Medalist speed/torque upgrade

Hi everyone, I've been stalking posts for a while and decided to join up.
My wife decided we might need a cart, so I bought one the next day.
I bought '95 Medalist, seems in good shape and has 1 year old batteries. I purchased a rear seat and installed it.

It doesn't do too badly, but I'd like some more speed and torque from it. Here's what I'm thinking of doing to it.

Admiral MOT-B1 motor, Alltrax SPM 48400 EZ, 200/800 solenoid, bigger F/R switch and 4ga cables all over.

I'm thinking that this set up should give me some more speed and a heap more torque to ferry passengers around.
Does this seem about right? I welcome all thoughts and advice.

Thanks guys.
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Old 06-28-2015, 06:49 PM   #2
Sir Nuke
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Default Re: 1995 Medalist speed/torque upgrade

if you have been stalking the board, certainly you have come across cartsunlimited.net you should check out his controller packages. here is a link to them. for what you described, you are looking for Pkg.#484B but to be honest....I personally would recommend Pkg.#485

http://www.cartsunlimited.net/Custom_Options.html



oh and papabear, CONGRATS on the ride, and Welcome to our happy little corner of the net, and to BGW. There is a BIG fridge on the back porch with anything you can think of in it...help yourself...of course only take what you can LEGALLY have. Make yourself at home on one of the big fluffy couches, kick your shoes off, put your feet up on one of the tables, yes we are allowed to do that, mom's, wive's, husbands, girlfirends and boyfriends here don't care....and take it easy.



oh...btw....every once in a while a food fight breaks out...so you may not want to wear nice clothes here.

Welcome!!
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Old 06-28-2015, 09:37 PM   #3
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Default Re: 1995 Medalist speed/torque upgrade

Thank you Sir Nuke.
I have ran across him, and learned a lot that I didn't know. Which to be honest is a lot. Electricity has always been a mystery to me.

I'll look into that package. If it's bigger it's got to be better. I'm already rethinking the motor choice. I started looking at one from D&D that claims speeds up to 21mph. I like the sound of that better than 19. But I have seen different claims on whether it would lose torque or give you a bit more. I was thinking that a bigger controller would allow more amps which would give you more torque. If it does that's the way I'd go. We don't really have hills here where I am.

That's the greatest fridge in the world. It kinda resembles mine.
And I've never seen a forum that spats didn't break out.

Now if I can get my teenaged boy off of it I might go cruising the neighborhood.
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Old 06-28-2015, 09:50 PM   #4
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Default Re: 1995 Medalist speed/torque upgrade

In the long run the best way to get both speed and torque together is by going to a higher voltage.

Higher voltage = less amps and less amps mean less problems of burning up stuff.

A 36 volt motor will spin a lot faster on 48 volts which in turn has the same effect on torque. If you apply 48 volts to the same 36 volt motor you just upped your torque.
Cost wise it's way more up front though but if you plan to keep it then it's worth it.
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Old 06-28-2015, 10:13 PM   #5
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Wink Re: 1995 Medalist speed/torque upgrade

I'm planning on keeping it, but I've got a finance committee that isn't as enthusiastic about speed as I am.

Could I do the upgrades I was talking about and then add a couple of batteries later, or is there more that I would have to change? Also would that precipitate the need for a different charger?

There are now 4 families that are friends of ours that have decided that they need carts. They are talking about buying new fancy ones. As long as mine's faster they'll still be jealous.
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Old 06-28-2015, 10:20 PM   #6
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Thumbs up Re: 1995 Medalist speed/torque upgrade

You can upgrade anyway you like but remember if you buy a controller for said cart and it's only rated for 36 volts then when you upgrade to 48 are more you will have to change it.

There are some controllers out there that can handle multi voltages but they cost money.
I'm not saying the only way to get what you want is by upgrading to more voltage but I have built several carts and the ones with more voltage always out performed the lesser voltage carts.
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Old 06-28-2015, 10:31 PM   #7
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Default Re: 1995 Medalist speed/torque upgrade

That makes perfect sense. I'll do some more digging around and see what I can come up with, but to be honest, cost is a factor. I think I've got about a grand to play with before she turns ugly.
This was suppose to just be something to run around the neighborhood in and to the kids' games at the school.
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Old 06-29-2015, 07:26 AM   #8
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Default Re: 1995 Medalist speed/torque upgrade

Quote:
Originally Posted by papabeer View Post
That makes perfect sense. I'll do some more digging around and see what I can come up with, but to be honest, cost is a factor. I think I've got about a grand to play with before she turns ugly.
This was suppose to just be something to run around the neighborhood in and to the kids' games at the school.
Papabear.....just so you know, the controller packages I sent you to that Scotty sells (pkg#484B and #485) BOTH can be used on both 36v AND 48v.....so you can get either of them now running 36v.....and upgrade to 48v down the road with no problems at all. I made sure of that when I bought my current set-up from Scotty
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Old 06-29-2015, 07:50 AM   #9
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Default Re: 1995 Medalist speed/torque upgrade

Outstanding! That makes life a whole lot easier. I'm sure that in the future I'll be going to 48v. Especially if my friends start tweaking there and start catching up to me.

Do either of you guys know anything about the D&D 170-006-0001 motor? It has the kind of speed that I'm looking for, but I'm also tagging that there is a bit of loss for torque. Not huge, something like 5-10%. I was wondering if a larger controller, solenoid, F/R switch and cables would compensate for that.

We don't really have hills here, just some slight rises, but with the weight of the rear seat in addition to extra passengers I want to make sure that it'll keep going.

It also looks like everyone is pretty high on Plum Quick. I was thinking about giving them a call this morning. I just hate the thought of my cart being down while I'm waiting for a motor.
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Old 06-29-2015, 08:10 AM   #10
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Default Re: 1995 Medalist speed/torque upgrade

The stock controller is rated at 275a. A 500 amp control will allow 45% more amperage to flow to the motor.
The motor will use this additional amperage to make an equivalent amount of torque given a healthy motor. Most of the guys use the SPM 500 control on this cart because it has higher peak and sustained outputs than any other 500 amp control. Additionally it has reverse polarity protection, throttle signal auto calibrating, built-in cooling fan, and can run on 36 or 48 volts. It can run the stock motor now and an aftermarket motor later.
The SPM 400 control would be a good choice if you are running on 48 volts or if you are not looking for maximum performance At 36 volts.
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