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Unread 06-06-2019, 10:12 AM   #231
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Default Re: Club Car DS lithium upgrade and 4-Link

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Originally Posted by NCPW View Post
Good luck and $$$ going AC!



I'm series, so no xct or A4 for me.



My controller kicked the bucket randomly pulling out of my driveway last week, no signs of failure prior to this, so I'm going with a SR48500 now.

Testing an FSIP controller
I'm able to get a deal on navitas setup. So it's not going to be that bad.


With the SR controller you could up the voltage to over 60v right? I think they have a 72v version. This would allow you to add the last cell to your lithium setup!

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Unread 06-06-2019, 12:45 PM   #232
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Default Re: Club Car DS lithium upgrade and 4-Link

I already have the the SR48500 on hand, just haven't had a second to hook it up yet.

The 72v wouldn't been nice, but I've already inquired about going to 72v a few years ago and called the engineer at D&D to get his thoughts on running my motor at 72 and his exact words were "please don't do it" So I decided to stick with the 48v
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Unread 06-15-2019, 03:15 PM   #233
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Default Re: Club Car DS lithium upgrade and 4-Link

I'm in the planning/purchasing parts stage of a 4-link rear for my Ezgo. I too am concerned about too much sag with two adults on the back or on the other hand coilovers that are too stiff for the application so I've been doing a lot of research. I just purchased a used set of Sportsman 500 coilovers on ebay that appear to be the same as the ones you used. They're a really common part for many of the sportsman models. Bronco shocks sells aftermarket replacement coilovers for the sportsman and lists the specs on their website which states the coilovers in question have a spring rate of 112. If this is true the back of your cart should have sagged at least 2-2.5 inches when you placed ~ 400 lbs on the back.

I'm not saying the Fox Podium shocks you recently purchased aren't higher quality but I'm having trouble understanding the disparity.

Do you know the spring rate of the Fox shocks?

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Originally Posted by NCPW View Post
So I installed the new shocks late last night. I can already tell these will be a better overall option from the fact that the cart will no long be riding "on" the shock but rather "in" the shock if that makes sense. When I set the cart back down off the floor jack, the shocks compressed a few inches which will give me better upward and downward travel.

The rear seemed to glide over the small bumps better and had a smoother transition when running through my front yard ditch bank on my short test drive. I haven't even touched the preload yet but I'm positive I will when I load up with 2 adults on the back seat.

New shock on the left and old on the right.
Attachment 186564
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Unread 06-15-2019, 07:50 PM   #234
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Default Re: Club Car DS lithium upgrade and 4-Link

125lbs spring rate from a handful of sources I've found online for the fox shocks.

The Sportsman 700 shocks I initially used were too stiff for my cart compared to these fox shocks with my lithium pack but probably would've been perfect if I still had lead acid batteries.
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Unread 06-15-2019, 07:55 PM   #235
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Default Re: Club Car DS lithium upgrade and 4-Link

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Originally Posted by dearthvader View Post
I'm not saying the Fox Podium shocks you recently purchased aren't higher quality but I'm having trouble understanding the disparity.
The biggest difference is the smaller helper spring (not sure exactly what it's called) that helps with the smaller bumps and also the preload adjustment is more customizable compared to the 5 or so settings the Sportsman coilover has.
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Unread 06-19-2019, 04:22 PM   #236
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Default Re: Club Car DS lithium upgrade and 4-Link

I still have FLA batteries so my cart weights quite a bit more than yours - hopefully that means mine will ride appropriately with the sportsman shocks.

The weight envelope on these carts makes planning difficult since they have a rear seat the net weight of the cart can vary significantly depending on number of passengers. Just think, 4 adults can nearly double the total cart weight making it difficult to have a pleasant ride with one person but yet not reach suspension travel limits with 4 adults on board.


Quote:
Originally Posted by NCPW View Post
125lbs spring rate from a handful of sources I've found online for the fox shocks.

The Sportsman 700 shocks I initially used were too stiff for my cart compared to these fox shocks with my lithium pack but probably would've been perfect if I still had lead acid batteries.
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Unread 06-24-2019, 01:16 PM   #237
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Default Re: Club Car DS lithium upgrade and 4-Link

So I upgraded my controller to an Alltrax SR-48500 and I'm really liking it. I was worried that going from a 700 amp to a 500 amp controller would be a disappointment, but Dave with Revolution Golf Cars assured me I'd be happy and he was right.

The only thing I've done so far to tweak the controller is move the Throttle Rate up to 16.5% from the standard 12.5% and I really like it. I can really punch the throttle and take off more quickly than I could with the FSIP controller. I might play around with the other adjustments when I get a chance to see if I can improve on anything.

To test out the Alltrax, I took the cart for a 10 mile test drive and it performed great. The highest temp the motor got to was 142F, the Reversing Contactor was 100F and the controller was at 110F. No cables were warm and no studs on any large cable connections were warm. Still loving the lithium pack also, best thing I've done to the cart and wish I would've done it long ago.

Like I said, I went on a 10 mile run and my pack went from 57.9V to 55.3V when I got back home. No doubt I could get over 20 miles out this pack if I needed to and that blows my expectations out of the water because I was only expecting around 15 miles tops.

The 4 link suspension is doing awesome also. All of my traction bar links are still nice and tight and quite, welded body and axle tabs look great and the upper bar for the top coilover tabs are still nice and snug. The Fox coilovers were the difference maker when it comes to ride comfort and everyone who rides on the cart mentions how nice the ride is compared to what they've experienced before Overall, everything is doing well!
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