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Nek · 07:05 AM

I think I found the lipos I needed :)
Fast laps packs *found* some 30C NeuEnergy 5S-1P 3300 at only 452g / 141mm x 48mm x 37mm
And it looks like those packs will be really nice for longer runs: 25-30C 5S 4500 538g / 156mm x 43mm x 39mm. Haven't found anything lighter in that capacity.

Concerning the motor I thought you would want about 2200 kv for a 1/8th buggy. So I should go for the higher KV 1512 1.5Y (1900kv), since the 3D is only 1700kv. I am still very confused on that whole kv deal lol I know it means the number of rpm at one volt, but err doesn't clear it up much more lol

EDIT 2: Well if I got it right with a 1700kv motor I get 31k rpm on 5S (18.5V). That's right what you want for a buggy right? Considering the fact that I don't plan on gearing for much top speed, 35 mph should be plenty!

EDIT: Since I am now on a 1512 size motor looks like the Tekin 1700kv RX8 package might be a very good choice for my build... I need to look some more into this setup :) Those should be hitting online stores pretty soon :p Hope Mike gets us a good deal on those :)

EDIT 3: (man I am starting to like those lol) Ok so I looked more into the Tekin combos and they look killer. Price is nice and since I need to wait for 808s to be in stock I might aswell do the same for my powerplant. So I tried using the speed calculator to find out which kv would work best and what size pinion I would need to have. First I want to make sure I got my settings right lol. 808 is the typical 43/13 diff ratio? And well jhautz already told me the spur had 42T so I think I'm good on the settings. Playing around gave me this:

On 1400kv: 25900 RPM. That seems pretty low, is that a problem? Cause with 14T it goes at 35mph and that gives me a good margin to play with.
On 1700kv: 31450 RPM. But now I need a 11T pinion to have a 35mph top speed. Not much margin left on that one.

So what would be the downsides of running the 1400kv motor?

Jhautz, How did you mount your MMM over the rear driveshaft? On some conversions I saw some sort of sevo mount was used... Did you make the mount yourself? I dont have much here to fab such stuff, I need to start hunting for something for another application that would work fine for what I want to do...

I think I'll start shopping for parts online tonight :)

	(#8)
Nek RC-Monster Stock Offline Posts: 36 Join Date: Mar 2009	04.05.2009, 02:51 AM I think I found the lipos I needed :) Fast laps packs found some 30C NeuEnergy 5S-1P 3300 at only 452g / 141mm x 48mm x 37mm And it looks like those packs will be really nice for longer runs: 25-30C 5S 4500 538g / 156mm x 43mm x 39mm. Haven't found anything lighter in that capacity. Concerning the motor I thought you would want about 2200 kv for a 1/8th buggy. So I should go for the higher KV 1512 1.5Y (1900kv), since the 3D is only 1700kv. I am still very confused on that whole kv deal lol I know it means the number of rpm at one volt, but err doesn't clear it up much more lol EDIT 2: Well if I got it right with a 1700kv motor I get 31k rpm on 5S (18.5V). That's right what you want for a buggy right? Considering the fact that I don't plan on gearing for much top speed, 35 mph should be plenty! EDIT: Since I am now on a 1512 size motor looks like the Tekin 1700kv RX8 package might be a very good choice for my build... I need to look some more into this setup :) Those should be hitting online stores pretty soon :p Hope Mike gets us a good deal on those :) EDIT 3: (man I am starting to like those lol) Ok so I looked more into the Tekin combos and they look killer. Price is nice and since I need to wait for 808s to be in stock I might aswell do the same for my powerplant. So I tried using the speed calculator to find out which kv would work best and what size pinion I would need to have. First I want to make sure I got my settings right lol. 808 is the typical 43/13 diff ratio? And well jhautz already told me the spur had 42T so I think I'm good on the settings. Playing around gave me this: On 1400kv: 25900 RPM. That seems pretty low, is that a problem? Cause with 14T it goes at 35mph and that gives me a good margin to play with. On 1700kv: 31450 RPM. But now I need a 11T pinion to have a 35mph top speed. Not much margin left on that one. So what would be the downsides of running the 1400kv motor? Jhautz, How did you mount your MMM over the rear driveshaft? On some conversions I saw some sort of sevo mount was used... Did you make the mount yourself? I dont have much here to fab such stuff, I need to start hunting for something for another application that would work fine for what I want to do... I think I'll start shopping for parts online tonight :) Last edited by Nek; 04.05.2009 at 07:05 AM.