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No idea, I just got it in a trade from someone who got it from someone else. I've checked the feel of the drive train and everything seems to be about right. Diffs are just a little bit firm, but everything seems to move very smoothly. I probably should look into all that though and check...

I'm pretty happy with the 4.5:1 ratio I have. It'll let me get a few speed runs on 3S before thermal shutdown, and on 2S it's pretty fast but seems to not overheat. With the 6.5+ pound weight of the vehicle with batteries, I'm well satisfied with this. It's slightly faster than it was before...

Well, I was disappointed with the top speed, so I'm at 54:12, or 4.5:1, which gives me great top speed at 2S and plenty of power, but I'm not overheating on that 2S, and I'll save the 3S for occasional speed runs. Also I got a 1/16th E-Revo VXL, and that thing with 4S will go over 50MPH, so I'm...

Well I weighed it, and it's between 6 and 6.5 pounds. The previous gear ratio was 4.67:1, but now it's 6:1. I haven't been able to run it since switching over, but we'll see what happens. Maybe now it'll do wheelies on a 2S with the extra torque!

Gotcha. Well, it could also be largely due to age, seeing as it's a several-years-old set.

Mine is old, before 2.4Ghz TQ. but still does really well for its age, and at least its thermal shut down works still. I think it's the ESC and not the motor but I'm not sure.

What do you mean "smaller?" It's a Stampede 4x4 VXL, a high-end 1/10th.

Wow, I guess it really is made for 2S. It already has only a 12T pinion gear, and the axle gear looks to be the biggest that will physically fit. I'd have to add a jack shaft to get a lower gear reduction, or smaller wheels.

In doing a little more research, it looks like the Stampede, although having 3S-capable electronics, is really designed for 2S (hence my issues, most likely). So I'll go with the 2S lipos for a while and see how it performs. That's my cheapest option as I can return the 3S lipos since I got...

Well I just remembered that the ESC has a "training mode" which uses 50% max throttle. I just did some testing, and a 3S at 50% throttle is only a *little* slower than a 2S at full power, and it would probably give me the longest runtime overall. Also, I tried the PC fan, doesn't do enough...

If I'm running a 2S, I shouldn't need it (so I may make it easy to remove), and with a 3S I'll just plug into the balance leads. And a 2S will still run a computer fan OK, just much lower RPM than otherwise.

Why wouldn't I run it straight from the battery? That's what I was planning on.

It has 3 very tiny ones, maybe an inch square each or so, two on the motor (with a small additional heatsink), and one on the ESC. But I think I'll add the PC fan to start. It's pretty lightweight, but I'll probably have to use steel to mount it because that's all I have access to right now...

Gearing down is certainly going to be cheap. Although I can return my 3S batteries still (bought them from Amazon), so going to 2S might be a cheaper start.

Dude I have a go kart, like I fit on it (although barely), and I'm genuinely thinking of getting a receiver and a large servo and making it RC. But I'm scared of having a 200-lb RC car, that I'll damage something.

You could always reinforce it with some steel underplating. Might have to use a smaller pinion gear for the extra weight though,

Thanks! Yeah, I'm pretty new here and new to the hobby.

Cool thanks. As a side note, I think I'm going to make a very interesting one-off build sometime. I have a motor I took from a drill, and it has its own ESC in the trigger. I'm thinking I'll just get a receiver and add an extra servo to actuate the trigger, and use a couple of relays and a...

Can you recommend a brand to look for, or should I just go to my local hobby shop and see what they have? I'm not afraid of the challenge of custom mounting a PC fan though if you think that could be a good option. They're huge, but they sure would move a lot of air. Might start with that for...

Should I really do both though? Or should I start with just doing one, and see if that's enough?