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160A is likely the limiting factor... castle xlx2Hi guys
My K8S is running 39/39 with 780kv & 160amp esc…I wouldn’t mind more top speed but I think I’ve maxxed out my gearing?
If so, maybe I need to stop driving my Motonica pan car
you mean ztw 12s right?160A is likely the limiting factor... castle xlx2
Also an option. for your reference in terms of power:you mean ztw 12s right?
Good to check indeed. I used 'likely'I don't think we know the ESC is the limiting factor just yet.
I don't own a K8s but I imagine there must be a way to gear up? Can you reduce the spur gear size?
Again, good call. But I still believe the XLX2 can never be a bad idea. Thanks for the shout-out. I was actually just trying to hold down the shop while waiting for you buddy!I don't think we know the ESC is the limiting factor just yet.
I don't own a K8s but I imagine there must be a way to gear up? Can you reduce the spur gear size?
Agreed, the XLX2 is the Bees Knees when it comes to ESCs, but if he is going 40mph and ran out of speed it may only need gears.Again, good call. But I still believe the XLX2 can never be a bad idea. Thanks for the shout-out. I was actually just trying to hold down the shop while waiting for you buddy!
Can I run a smaller spur gear than 39?
I guess I could also run a larger pinion than 39?
…keeping in mind that I’m running 39/39 but if I did any of the above to run a taller ratio, would I run into over heating issues?
Good point - will check temps when I take it out nextThe question is what are your temps at now based on how you drive.
If they are decent (below 140 F) you have some room to change gears.
So the 12s has 15kw whereas the 8s has 20kw? How is that? Due to difference in amps? I need to understand thisAlso an option. for your reference in terms of power:
(12S) 50.4V * 300A = 15kW
(8S) 33.6V * ~600A = 20kW
Flier:
(22S) 92.4V * 400A = 37kW
All those batteries still need to fit in the car though
Good to check indeed. I used 'likely'
Yes, amps are usually a much more limiting factor than voltage. But it takes amps times volts to get watts (AxV=W). So you can sure increase either side of the equation. But increasing amps comes at more of a premium as it creates more heat. But today, the XLX2 is still the best we have for a standard sized RC.Good point - will check temps when I take it out next
So the 12s has 15kw whereas the 8s has 20kw? How is that? Due to difference in amps? I need to understand this
Adding to what Jon mentioned here /\ the other part is that most 12s ESC go up in flames when you try to run the hard in speed applications.Yes, amps are usually a much more limiting factor than voltage. But it takes amps times volts to get watts (AxV=W). So you can sure increase either side of the equation. But increasing amps comes at more of a premium as it creates more heat. But today, the XLX2 is still the best we have for a standard sized RC.
Which 2 cars hit 190mph? ImpressiveAdding to what Jon mentioned here /\ the other part is that most 12s ESC go up in flames when you try to run the hard in speed applications.
Sadly you have 2 options. The XLX2 at around $250 or MgM which runs around $700.
With all the money thrown around in this hobby I have yet to see anyone go fast with an MgM, but the RC boat guys swear by those ESCs. Possibly for the same reason that people think MaxAmps batteries are good. (If its 3x the price it must be good)
Given that we have now seen 2 people hit 190 mph with the XLX2 with the Arrma 1/7 scale chassis it is clear that the XLX2 is up for the job.
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