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BrianG · 02:06 AM

Well, as you know, runtime depends on a lot of factors, but with all else being equal, I could use the 2.5d and gear up and get the same runtime and speed as what I have now because the motor would be loaded more.

What I was shooting for was about 35mph for track use. With all the gearing (standard buggy diffs, 46T spur, 14T pinion), and with 4s batteries, I chose the motor that would get me near 35mph, which was one with a kv around 2000rpm/v. Since this motor spins faster, I'll probably get a smaller pinion to compensate. This will reduce the top speed closer to what I want, help unload the motor a bit, help runtime, and keep things cooler.

I use 4.25" as the tire size.

And yeah, I'll post runtime. But it will be closer to actual race time before I take any serious measurements. That's assuming I get good enough to even try racing this year.

	(#11)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	02.22.2007, 02:05 AM Well, as you know, runtime depends on a lot of factors, but with all else being equal, I could use the 2.5d and gear up and get the same runtime and speed as what I have now because the motor would be loaded more. What I was shooting for was about 35mph for track use. With all the gearing (standard buggy diffs, 46T spur, 14T pinion), and with 4s batteries, I chose the motor that would get me near 35mph, which was one with a kv around 2000rpm/v. Since this motor spins faster, I'll probably get a smaller pinion to compensate. This will reduce the top speed closer to what I want, help unload the motor a bit, help runtime, and keep things cooler. I use 4.25" as the tire size. And yeah, I'll post runtime. But it will be closer to actual race time before I take any serious measurements. That's assuming I get good enough to even try racing this year. Last edited by BrianG; 02.22.2007 at 02:06 AM.