10-06-2021, 06:28 PM | #1 |
Not Yet Wild
Join Date: Sep 2021
Location: Greenville, NC
Posts: 30
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Real World Comparisons
Identical 1997 TXT DCS carts, both with B2 motors, 600amp controllers, 400amp solenoids, new F/R, 20" tires, all wires the same, all mechanical the same.
One cart with 36v LifePO4 (3 12v in series) --- One cart with 36v (LA in series) Both carts carrying 2 230lb men (460lbs) ---- golf/sporting clays gear/drinks or beer/balls/shotgun shells 160lbs total LifePO4 batteries 3 x 24 =72lbs LA batteries 3 x 83 = 249lbs Total load 692lbs LifePO4 Total load LA 869lbs What's the speed & torque gonna be with the 177lb (20.37%) difference in load? Thanks!!! |
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10-07-2021, 06:06 AM | #2 |
Gone Wild
Join Date: Oct 2012
Location: Southwestern Pa.
Posts: 6,214
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Re: Real World Comparisons
I can't provide you with the hard numbers you're looking for....maybe one of those engineering math kind of guys can.
But I do question your battery weight differences. Your FLA's are only 3 in a series? Most carts use 6 FLA's at maybe 60-lbs each for 360-lbs of weight. When I swapped to Nissan Leaf's I took out 8 Trojan FLA's at 62-lbs each totaling 496-lbs. I estimated my Nissan Leaf 14 module pack weights 170-lbs. (My SWAG) for a weight savings of 326-lbs. Now, the cart with FLA's weighs (my estimation) 1,000-lbs. So with the 326-lb weight loss (or 32.6%) I do get to top speed faster, and my "initial takeoff" (torque) ....but again, my Alltrax SR controller settings have a lot to do with the torque curve I setup. So....and I dunno if this helps you.....swapping to lithium is nothing but a plus. Longer run time along with zero maintenance of battery terminals is a huge plus. That, and along with my now OBC makes "plug 'n play" anywhere much easier. FWIW |
10-07-2021, 06:23 AM | #3 |
Not Yet Wild
Join Date: Sep 2021
Location: Greenville, NC
Posts: 30
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Re: Real World Comparisons
Thanks!
I just looked at the Trogan Battery website for 12v golf cart batteries to come up with that "'83lbs". 6 6v batteries at 62lbs would weigh 372lbs and give the LifePO4 cart approximately a 30% weight advantage. I guess a much more simple question should have been about weight reduction percentage would be the same percentage increase in speed and torque. Would a 30% weaight reduction get a 30% (approximate) increase in speed and torque? Thanks again!!! |
10-07-2021, 01:42 PM | #4 |
Gone Wild
Join Date: Oct 2012
Location: Southwestern Pa.
Posts: 6,214
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Re: Real World Comparisons
I can't say if that's a true statement or not. I'm thinking not.
But I'm not an engineer nor do I have much experience with measuring the speed thing. I use my cart for hunting so torque is what's important to me. You can only go so fast thru the woods!! |
10-07-2021, 02:01 PM | #5 |
Gone Wild
Join Date: May 2012
Location: Rio Verde, Az
Posts: 7,170
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Re: Real World Comparisons
On level ground, weight reduction won't change top speed much at all but it will change acceleration to top speed. Torque won't change a bit since that is based purely on the drive line performance.
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10-07-2021, 02:21 PM | #6 |
Not Yet Wild
Join Date: Sep 2021
Location: Greenville, NC
Posts: 30
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Re: Real World Comparisons
Thanks!!!
So carrying 20/30% less weight will NOT increase torque, but it will make it easier for the cart motor to take it uphill, and perhaps at a higher speed? Forgive me boys, I'm really new at this |
10-07-2021, 04:10 PM | #7 |
Gone Wild
Join Date: May 2012
Location: Rio Verde, Az
Posts: 7,170
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Re: Real World Comparisons
It'll feel faster because it will accelerate better and it will climb hills better. The downside is that it will ride like an empty pickup truck.
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10-07-2021, 06:19 PM | #8 |
Not Yet Wild
Join Date: Sep 2021
Location: Greenville, NC
Posts: 30
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Re: Real World Comparisons
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10-11-2021, 01:37 PM | #9 |
Gone Wild
Join Date: Oct 2019
Posts: 646
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Re: Real World Comparisons
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10-11-2021, 03:29 PM | #10 |
Not Yet Wild
Join Date: Sep 2021
Location: Greenville, NC
Posts: 30
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Re: Real World Comparisons
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