I would ask that you provide data to support a claim such as that. I do car audio a lot, and pushing more than 50amps over 10 gauge, even over short distances, is absolutely unheard of. You just don’t do it safely. Can the motors draw higher amperage’s? Sure, but now we’re talking 3 phase to the motor, and that’s a different animal.
Your logic makes sense for car audio, since the voltage is low at 12V and the wire runs are long. I don’t know how credible the source is, but this chart does a good job showing the effect both distance and voltage have on wire ratings. A 12 inch run of 10awg wire on 6S voltage can easily handle over 100 amps continuous. Maybe 200. In my opinion, of course, which probably doesn’t matter.
That current has to come from somewhere, and it runs right through those connectors you’re using.
Voltage doesn’t affect how much amperage a wire can handle. Amps is amps. Voltage does affect the length it can carry that amperage.
In DC you have one power, and one ground. The ground must be able to discharge the power, so only one side is rated. In 3 phase all 3 wires are rated.
. Those RCA’s are silver coated copper plugs. The difference being, to plate silver you must first plate it in a lesser metal, which effect’s conductivity. These are straight silver over copper.
Turns out someone already did this test. The results were than even the smaller Anderson plug they used in the test has less voltage drop than the XT90. One can assume that the larger Anderson plug that I have linked would probably outperform the XT150 pretty handedly. As noted in the linked data, make sure and use an appropriate crimp tool.
Same here! Solder is soft compared to other metals, and isn’t particularly conductive. I honestly try to avoid it where possible. This of course varies by the type you get, but even silver solder is very low % conductivity.
Cool, this is the same piece that he linked, but from Adu. So it’s 7075 instead of 6066
Another pro-tip on this. Make your battery wires as absolutely short as possible. The wires between the ESC and motor are far less sensitive to length. If you add 6” to your battery wire it will absolutely make a difference. DC power flows like water in a pipe. The longer the pipe, the longer it takes for the water to get there. It’s also harder to stop, which is where putting a cap pack NEAR the ESC helps. Putting a cap pack attached to lead wires kind of defeats the purpose.
I’ve seen this all over the place. This is what happens when RC ratings meet real world ratings. We all know the C ratings they put on batteries are bogus. So are the rating capabilities of the RC plugs. They can handle it in short burst, but not sustained. Its all about heat dissipation, and the tiny RC connectors just don’t compare to an Anderson plug. Surprisingly, the Anderson plug isn’t much heavier than its RC counterparts.
If you use silicone power cables, as most of these cables are, then you can step up to running 75amp connectors on these plugs.
I'm no RC Pro nor am I chasing a speed record, but I've built hundreds of motorcycle engines, one Suzuki GS1100E Turbo that was on the news in the late 80's with methanol injection (guy went to prison for a year) and built and drag raced bikes on a amatuer level but came in 9th in Pro E.T. and now work in manufacturing heavy machinery (can making machines) where tolerances are to the ten thousands of an inch (0.0002 to 0.0005), I think I'm qualified to say.... Scorched has it down.
One thing you might look into is the Vitavon differential spur gear. They offer it in a 44t. This will allow you to get your motor closer to center, and potentially avoid needing to buy a new mount.
Agree. I didn’t want to wait for Vitavon shipping from China so I bought this one. It has held up great to big power.
Thats a good find! How is it holding up?
I agree, Scorched is hands down the best made and designed gear I own. The shipping being crazy fast is icing on the
It has held up great to big power. 1721 1260kv on 6S in a Kraton.
Nice! I just got my Vitavon 44t in. I always aim for the lowest TTC possible, and this should help me get lower. Right now I’m running a 4990 6S with a 21T on the Fireteam converted to Big Rock, and it is an absolute monster! It pulls nice wheelies on asphalt from a stand still. I have a 5690 I was going to put in, but I think running the 4990 on 8S will be the sweet spot for weight/power ratio. I’m pretty sure this thing would do standing backflips on 8S. Can’t wait!
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