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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV.



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Unread 11-13-2008, 05:07 PM   #21
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Default Re: EZ Go Electric Models

I am currently inthe middle of the 48v conversion. Alltrak 500 programable controler, Trojan 8vX6, contactor, cables, 48 v charger and miss parts and I have about $1700 in cost. I will run the stock motor as long as it last. then I plan on getting an EMP 2 speed. I have 3000 in a lifted TXT cart.
but in the end I will have what I want and am happy with.
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Unread 11-13-2008, 05:17 PM   #22
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Default Re: EZ Go Electric Models

Quote:
Originally Posted by gornoman View Post
A 48v cart running a 48v motor is no faster than a 36v cart running a 36v motor. Now take a 36v motor and run it on 48v, much better!
Gorman I understand perfectly. Now take a dual rated motor at 36/48 like a generic GE RAPTOR motor rated at 6.1 Hp @ 36, or 9 HP @ 48?. Assuming the right controller you get low 20 mph somthing @ 36 volts, and pushing 30 mph @ 48. Yes I know my speed/torque demon friend I am a Electical engineer who has a deep understanding of the physics involved...
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Unread 11-13-2008, 06:09 PM   #23
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Default Re: EZ Go Electric Models

Wanna know how fast it's gonna go? Use this:

MPH = RPM x TIRE RADIUS / GEAR RATIO x 168

Please notice that horsepower is not quoted in this equation, as it has no bearing on speed. Horsepower is only needed to push the cart to the rated RPM of the motor at a defined voltage. If the horsepower is too low the cart won't make the rated RPM's because of physical resistance.
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Unread 11-13-2008, 08:29 PM   #24
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Default Re: EZ Go Electric Models

Quote:
Originally Posted by gornoman View Post
Wanna know how fast it's gonna go? Use this:

MPH = RPM x TIRE RADIUS / GEAR RATIO x 168

Please notice that horsepower is not quoted in this equation,
Neither is torque, and the equation you quote has limits, and only works within specified range of limits. In other words it is a Dumbed Down analogy. It ignores weight, rolling resistance, wind resistance, etc… HP is a product of torque and RPM. What if I have 30 inch tires? Your equation will not work because all the factors are not factored in the equation. I am not trying to be critical, but a lot of info I see being passed off here is not accurate. Sorry I am an electrical engineer, and I need more accurate math.
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Unread 11-13-2008, 08:34 PM   #25
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Default Re: EZ Go Electric Models

The math is accurate. The formula ASSUMES the cart can achieve the designed RPM regardless of resisitance. Use the formula to determine how fast it CAN go if it has the HP to reach the design RPM. Your reasults may vary.
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Unread 11-13-2008, 08:38 PM   #26
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Default Re: EZ Go Electric Models

Or you could just go here. Buggies Gone Wild Speed Calculator LOL!
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Unread 11-13-2008, 10:51 PM   #27
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Default Re: EZ Go Electric Models

Quote:
Originally Posted by gornoman View Post
The math is accurate. The formula ASSUMES the cart can achieve the designed RPM regardless of resisitance.
The formula is only accurate if the inputed RPM is avhieved as you indicated. In the real world, it is unlikely you will achieve the assumed rpm.
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Unread 11-13-2008, 11:50 PM   #28
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Default Re: EZ Go Electric Models

Quote:
Originally Posted by dereckbc View Post
Neither is torque, and the equation you quote has limits, and only works within specified range of limits. In other words it is a Dumbed Down analogy. It ignores weight, rolling resistance, wind resistance, etc… HP is a product of torque and RPM. What if I have 30 inch tires? Your equation will not work because all the factors are not factored in the equation. I am not trying to be critical, but a lot of info I see being passed off here is not accurate. Sorry I am an electrical engineer, and I need more accurate math.
It's OK. You don't have to apologize for what you are. We like everybody here at BGW.
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Unread 11-14-2008, 09:12 AM   #29
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Default Re: EZ Go Electric Models

Quote:
Originally Posted by pggroves View Post
It's OK. You don't have to apologize for what you are. We like everybody here at BGW.

Ouch, that smarts...... I be one of those too....
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Unread 11-14-2008, 10:02 AM   #30
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Default Re: EZ Go Electric Models

No offense intended.
Just trying to inject a bit of levity and lighten the mood!
As boo so aptly states we're here for the fun and the party!
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