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The Reedy 3300kv motor that comes with the RTR RC10B4, is this the equivalent of a 13.5 or 17.5 motor?

i think it's a bit quicker then a 13.5

JK Racing wrote:KV matches a 13.5, but most local tracks to me allow it to run with the 17.5s, they say it isnt all the fast (like a good 13.5)

RCveteran wrote:I agree its probably between the two in reality. On soft throttle profile on my ESC it is closer to a 17.5 but on the hard throttle profile it is for sure faster closer to a 13.5. It's not a bad motor for what you can get them for taken new out of all the RTR's.

Hope this helps. I have a 4900 that I haven't yet used... I'm guessing that it is something like a 8.5, but don't know for sure. I may actually try and trade it for a 3900.

Gotta love new tech. I remember when I stopped running RC in the early 90's it was hard to get enough power. Now many of us are getting lower wind/kv motors to keep under control. I originally got a 6900kv Castle combo for my T4. Holy cow. Now I use a 5700kv for larger tracks and a 4900kv for smaller. The 4900kv really hits my sweet spot for all around use.

so would you guys says the 3900kV motor would be a solid 13.5 equivalent or slightly quicker?

I'm going to pick up the reedy brushless combo, but was looking at the 3900kV motor rather than the rtr 3300kV, I want the car to be quick, but not out-of-control-burn-up-parts stupid.....

IMO the 3900 would not be too hot. What were you going to be using it in?

2wd offroad, 4wd offroad, and either a Yr4 touring car or a DS. pretty much my all round bashing/cruising system....with so many cars, and lots of old school stuff, and not nearly enough for every one of them, I was going to transfer the system as neccessary depending on my mood and which car I want to drive. I want something decently middle of the road, more or less like my old 13 and 14 turn mod motors, but with a little more run time.

I think the 3900 would be a good starter. My son has a 3300 in his T4 and it is good but it could use a little more for my taste.