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Electric Club Car Electric DS, and Precedent golf cars |
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10-02-2019, 09:45 AM | #1 |
Not Yet Wild
Join Date: Dec 2018
Location: Treasure Island, FL
Posts: 12
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High Speed Rear End?
I have a 1981 CC DS that I'm slowly upgrading as a part-time, as funds and parts are available project.
Since the original rear end in this cart is the old 16-spline female Terrill differential and motors are hard to come by, I found a 10-spline male differential to replace it with for $100. What I've noticed is the existing setup is 2HP, 2,800 RPM and goes about 14mph with 18" tires. I worked out the differential gear ratio to be about 11:1. The new axle is 6.25:1 and I plan up upgrading to 48V and solid state when I install it and doing lift kit and 21" tires My questions are: 1.) Does this new axle have "high speed" gear set, is 6.25:1 common? 2.) Would 5HP, 3000 RPM motor (48V Solid State) get me decent performance? I've worked out that 3000RPM = ~30 MPH with 21" tires. 3.) I'm wondering if I need more torque but, I'm in FL and it's flat. Considering gear ratio and HP increase this should be about 40% more HP than existing setup. Any feedback or guidance is appreciated. Thanks |
10-02-2019, 09:54 AM | #2 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
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Re: High Speed Rear End?
Are You sure the new axle is 6.25:1?
If You tested that by physically rotating one wheel while keeping the other wheel stationary You will get half of the ratio. The standard club car Graziano ratio is 12.315:1 |
10-02-2019, 06:12 PM | #3 |
Not Yet Wild
Join Date: Dec 2018
Location: Treasure Island, FL
Posts: 12
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Re: High Speed Rear End?
Sergio, you are right. I wasn't paying attention.
The rear end was on the floor in may garage. I marked one brake drum and spun the motor input shaft. I neglected to check that the other brake drum was spinning... it was dragging on the ground. It's great to have a forum like this to check things like this. I would have ended up with a really slow cart! |
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