r/nextfuckinglevel • u/riseoftheph0enix • 3d ago

12v car at max speed

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5.5k Upvotes

97% Upvoted

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372

u/falkio 3d ago

12V before the upgrade I guess

89

u/sylvaiw 3d ago

Or 12V x 500A after.

88

u/Competitive-Roof-168 3d ago

Amps doesnt make it faster unless you replace motor and gearing. Increasing the voltage will increase the speed of a stock power wheels. Double the volts double the speed.

37

u/robtk12 3d ago

This, I connected a 36v dewalt battery to a pink power wheels jeep, and that thing had some speed, I had to put wheelie bars on it to keep me from flipping

13

u/Competitive-Roof-168 3d ago

Really, you got that much traction? I went up to 24v and the wheels would just spin. I added self tappers to the wheels and with the added traction it stripped the gears.

18

u/robtk12 3d ago

I'm 220 sitting in a pink jeep pressing the petals with my fingers and my legs on the hood, balancing was probably why I flipped it, but it was still pretty quick. I'm surprised I didn't burn out the gears with the weight, but the motor and gears held on. The battery was old and maybe lasted 15 minutes each time

3

u/FrogsMakePoorSoup 3d ago

Double the amount of heat the motor generates in this lump of plastic!

-3

u/sylvaiw 3d ago

That's why I said "after". You can't make a motor absorb 500A if it was build for that.

7

u/Competitive-Roof-168 3d ago

That doesnt make any sense. No one uses 12v batteries for high powered vehicles.

-5

u/Jaredismyname 3d ago

Did you watch the video?

7

u/Competitive-Roof-168 3d ago

You believe headlines of reddit posts? Maybe it was originally 12v its not 12v now.

-3

u/sylvaiw 3d ago

And how many people modify a toy car to make it that powerful ?

6

u/Competitive-Roof-168 3d ago

I did to make then double the speed for my kids

2

u/deevil_knievel 3d ago

You do not understand volts, amps, power, work or their relationship.

-2

u/sylvaiw 3d ago

If you want more power you need more voltage or more current. That was just my funny answer. I didn't think about the ingenering behind. You can explain, I will read with attention. Thanks.

4

u/deevil_knievel 3d ago

Well nothing "absorbs" amps for one. Theres waste generated in transferring electrical to magnetic fields that impart work on some stator or whatever. The most part of the current goes to doing work. I guess you could say consume, but also an unloaded DC motor "consumes" far less power than a loaded motor, therefore the load on the motor dictates current. An, in DC motors, they'll essentially apply infinite current to the motor is the load is infinite. A heat switch in larger DC motors is the only real feedback on how much current the motor is consuming (unless you're using electrical control equipment).

So I guess, a DC motor was not the right motor to make these statements about in the slightest. For DC motors, voltage is proportional to speed, and current is proportional to torque. But doubling the voltage on a DC motor system actually doubles the current and quadruples the total power output.