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Old 03-13-2013, 08:47 PM   #1
speedgolfer
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Default Some cable testing on sizes 4g to 2g

made a set of 2g cables had 4g on cart so with the 4 g cables with fully charged batterys
test one we have a river hill witch is 1 mile form my house, river hill is Tar and steep and 3/4 mile long so my cart on the flats goes 15 MPH it will hold it there on the flat road, go down the hill come back up it runs a constant 11.4 mph for 3 times up hill, 4th time 10.4 MPH and 14.8 MPH the mile home on flat ground put it on charger not into the red on charger (charged it overnight)

test 2 put new 2g cables on cart took on flat ground to river hill same 15 mph went down hill came back up 14.4 mph for 3 times 4th time 14.1 so went back the mile on the flat road speed held at 15 mph so 2g cables do make a big difference, put on charger it was just into the red on charger but not much difference so bigger cables do add more extened power but does take a little more out of the batterys note (batterys are new last fall)

just a non professinal guy doing a test
Mike
it was with the blue one


Last edited by speedgolfer; 03-13-2013 at 08:56 PM.. Reason: some wrong spelling
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Old 03-13-2013, 08:52 PM   #2
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Default Re: Some cable testing on sizes 4g to 2g

Almost scientific enough for a conclusion, eh? I like it!

I also like your wheels!
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Old 03-13-2013, 08:59 PM   #3
speedgolfer
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Default Re: Some cable testing on sizes 4g to 2g

no expert by any means wanted to try this and thats what i came up with i was using GPS
24 hours apart between tests and both days 20 to 25 degree's both times
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Old 03-13-2013, 09:01 PM   #4
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Default Re: Some cable testing on sizes 4g to 2g

YA the rims on the gray one i like to
the blue cart is hub caps hope to change to different rims this summer and bigger like 23 or 25 x 11 x 8
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Old 03-14-2013, 08:35 AM   #5
JohnnieB
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Default Re: Some cable testing on sizes 4g to 2g

Quote:
Originally Posted by speedgolfer View Post
.................
just a non professinal guy doing a test
...................
Darn good testing technique for a self proclaimed "Nonprofessional".

I see a F/R lever on the front of the seat support, so it is a Series drive cart.
Were all 13 high current cables upgraded to 2Ga?
What is the tire height?
What size controller?
What size battery pack (Volts and Amp-Hours)

The outbound leg (Home to the Hill) sped was consistent, but if 15MPH doesn't closely match the speed you ought to get with the tire height, you may have bottlenecks in the high current loop other than the 4Ga cables.

You got a 26.3% less speed loss on the first three hill climbs with 2Ga cables than the first three with 4Ga.


Thank you for taking the time and effort to compare the two sets of cables.
I knew there would be a difference in how much a series cart would slow on hills, but I didn't know how much it would be. (Too many variables to calculate)
Now I have a ballpark figure for series carts.
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Old 03-14-2013, 09:08 AM   #6
scottyb
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Default Re: Some cable testing on sizes 4g to 2g

It looks like we could safely say there was a 25% reduction in speed loss under load but ... I wonder what that would equate to in actual amperage delivery?
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Old 03-14-2013, 11:18 AM   #7
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Default Re: Some cable testing on sizes 4g to 2g

Going from 4Ga to 2Ga is a 37% reduction in resistance, but the actual reduction in Ohms isn't much since the resistance of 4Ga is only 0.2485 milli-Ohms per foot to start with. (2Ga is 0.1563 milli-Ohm/ft)

If we had the total length of the 13 high current cables, the controller amps and the nominal pack voltage, we could crunch the numbers and come up with an approximation on Watts, Volts and Amps differences.
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Old 03-14-2013, 04:11 PM   #8
speedgolfer
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Default Re: Some cable testing on sizes 4g to 2g

I don't know none of them fancy terms just the test i did and what i got was better
what is bottle necking in the current loop
the cart used to be faster with this same set up but over the years it has slowed down about 3 mph, stock controler, 36 volt battery set up, 18.5 tall tires
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Old 03-14-2013, 05:52 PM   #9
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Default Re: Some cable testing on sizes 4g to 2g

Bottle necking, commonly used to describe a restriction in flow..... as in a 4 lane highway reduced for construction down to 2 lanes, hense a bottleneck... in the current flow on your cart, 2 guage cables everywhere, yet something slowing the free flow of current to the motor...

Just thought I'd throw my 2 cents in, that and saying things that could be totally wrong yet sounding like I know what the hell I'm talking about....lol
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Old 03-14-2013, 06:57 PM   #10
speedgolfer
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Default Re: Some cable testing on sizes 4g to 2g

yes it always went around 18 MPH but has gotten slower over the years the cart has 1000's of miles on it everything is stock from new i have replaced batterys and cables and a micro switch thats it
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