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Old 02-21-2015, 02:06 PM   #1
rbuggies48IN
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Default EZGO Electric Tachometer

Has anyone installed a Tachometer on their EZGO or Western Golf Cart? If so, what tach did you use and please explain installation.
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Old 02-21-2015, 02:42 PM   #2
Volt_Ampere
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Default Re: EZGO Electric Tachometer

Why a tach on an electric cart????
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Old 02-21-2015, 05:42 PM   #3
Revolution
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Default Re: EZGO Electric Tachometer

Ive never seen a tachometer for an electric cart. The only thing I can think of is using a product called Cycle Analyst. You can program it to display RPM in the field marked MPH, but I am not sure why you might want to do that.
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Old 02-21-2015, 06:18 PM   #4
rbuggies48IN
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Default Re: EZGO Electric Tachometer

-don't need one- I was just curious to read motor rpm vs. calculating it from my GPS speedometer and tire size.
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Old 02-21-2015, 09:44 PM   #5
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Default Re: EZGO Electric Tachometer

We don't need everything, some things we just want, cuz their cool. I would LOVE a tach for a sparky cart. I'm surprised it doesn't exist already.
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Old 02-22-2015, 12:27 AM   #6
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Default Re: EZGO Electric Tachometer

Its gonna be tough on any "series" cart (never designed for a tach sensor). "sepex"carts already have a tach sensor (except DCS and clubcar Regen1). Might be able to find a way to "steal" its signal (but most have at least 4 pulses per revolution). Theres gonna be some "trial-&-error" to get them to read true rpm correctly. If you are not sure what type system you have (series or sepex), you are not yet ready to try to make a tach sensor/ tachometer mod. You could use readily available bike speedometers to calculate your rpms, If you know the original gear ratio.
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Old 02-22-2015, 10:16 AM   #7
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Default Re: EZGO Electric Tachometer

Like CG said, you need a speed sensor on the motor, so that pretty much limits it to Sepex drive systems like the PDS and similar.

If your motor does have a speed sensor, connecting an electronic tachometer is fairly straightforward.

Attached are the tach and wiring diagram I'll be using when I finally get around to installing it.

The tach I'm using is called an Ultra-Shift Light (Stewart Warner) and the shift LEDS can be set to anything fro 0-13,000 RPM. My plan is to set them to come on at 6,500 RPM. which is the max recommended RPM for my motor.

I have an automotive type DMM in my collection and when I was running a stock PDS system, I used it to measure motor RPM. (Neg test lead to J5 Pin-1 and Pos test lead to J5 Pin-2, which is the sensor output signal.) When set for an 8 cylinder engine, it gave me an RPM that matched my RPM calculations based on GPS speed, tire heright and gear ratio, so the output from a the speed sensor on a stock PDS motor is 4 pulses per motor revolution.
Attached Images
File Type: jpg sww-114906_cp.jpg (15.3 KB, 0 views)
File Type: jpg Tach interface.jpg (18.8 KB, 0 views)
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Old 02-22-2015, 10:50 AM   #8
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Default Re: EZGO Electric Tachometer

Very interesting... JohnnieB, did you have the sensor connected to the controller at the time?
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Old 02-22-2015, 11:20 AM   #9
yurtle
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Default Re: EZGO Electric Tachometer

I don't think Alltrax uses this sensor.
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Old 02-22-2015, 11:22 AM   #10
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Default Re: EZGO Electric Tachometer

JohnnyB has an Alltrax DCX, no speed sensor input needed.
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