chirivita

It's the perfect motor for 3S. I have both the 2650 and 1900 for 3 and 4S respectively, there's almost no difference in performance.

With 4400mah 3S batteries i can get 13-14 minutes of runtime, so 15min mains are possible with 5000mah or a little more.

blade329

iTrader: (114)

I recently drove a Losi 8ight 2.0 with a 2650kv on 4S. I absolutely HATED it. It's an extremely inefficient motor for racing. Way too much power and you'll never be able to put it all down to the dirt. Anything over 2050 for a buggy is waste, IMHO. I had much faster lap times with the 1900kv. No contest. They run hot and the run time is awful. The Tekin guys will even tell you that their 2650kv is not recommended for racing.
There are some guys who run it on 3S with some success though. I don't know what run times they get. I know one racer who didn't like it on 3S and sold it to go with a 1900kv. He is much happier.

blade329

iTrader: (114)

Just out of curiosity, if you have to turn the power down that much doesn't that mean you have too much motor?
When I was looking for an 1/8th motor for my first buggy, a few guys running the Castle 2650 told me they had to turn the throttle epa down to "control it better". Well I thought "what's the point of having a bigger motor then?" I just bought a tamer motor and I don't have to fiddle with epa or esc power at all. I can run a 4s and, properly geared, be just as fast as any buggy out there. I have absolutely no heat issues either. I don't even run a fan on my RX8.

toyoter91

iTrader: (47)

Basically it allows me to not change gearing or motors for the two drastically different tracks in the Dallas area

one track I run at 70% epa and the other is at around 90 or so depending on the track conditions. I am just lazy.

I will say I don't really like the temps I see with the 2650 over my older 2250 tekin motor. Most likely will be going back on my 2250 at some point.

Dr. Evil

iTrader: (12)

Well, I still run a 2650kv (4s) in my Losi Tekno converted buggy. I started off with the 2650kv long time ago and the only issue I went through was excessive heat. This was because I was driving like I had no since. I was not the fastest around the track, but, man.. I sure could clear any jump out there. I went through testing the 2650kv with direct drive, then went to the clutch setup, then went to Teknos v2 clutch. After bending 2 motor shafts, I went back to direct drive, but, I use mechanical brakes. I think this is the ticket.

As far as run time. I ran a 20 minute main in 100 degree heat with not problem on a Castle Creations System about 3 years ago. I recently tested this to see if I could do it again and I at last ran a 18 minute main without any problems.

Now.. I ended up purchasing a Tekin 2050Kv system for my truggy. So, I put it into my buggy to see if I could tell the difference. The 2050 felt a little soft. I figure I am use to the 2650kv so that is my excuse. I'm not a throttle jockey as I was when I first got the car. I think the 2650kv has some advantages and that being, you are not going to pass me going down the straights,and I'd be hard pressed to see you out jump me.

Now.. That being said, the negative factor is heat. I have gone through
3 Castle ESCs and 1 2 tekins. I never had the 2650 on the Tekin but, maybe i just had bad escs. One of them blew up 100 feet after putting it on the track. Caught on fire and melted down to the ground. Shot a 3 foot flame to boot. I keep a 2nd fan on the ESC which always runs. The ESCs built in fan generally doesn't come on. I think I have had issues with the ESCs because of impact. Harsh landings. I've neve broken anything on the Losi and I am surprised based on some of the landings I have taken. I built a track in my back yard and I was testing a jump I made. I could easily tag the lower lines on the power pole off one of my jumps. I since changed it's location and made it a different kind of jump.

Anyway... I still run the 2650 and it works for me. I have run the 2050, but, got beaten down the straight away by a Nitro buggy running a Werks B6 engine. I could not believe it. Maybe I had it geared down that day...

LOL..

morgoth

Well, a months ago I was at the track testing my Tekno V4 chassis. There were some other guys driving and one had a D8 with 2200kv mamba set.

My 1900kv and rx8 have throttle profile 2 on it, about 20 or 25% expo, current limiter enabled at 70% and a little dynamic timing. I'm driving with a 16T pinion to smooth it even more.
Well, the guys with his 2200kv truggy motor in the buggy had waaaay more power then me, but he could clear our tripple. He said my Tekin had more power than his Mamba system. I told him that he needed to go smooth trough the corner before the jump and then full throttle when coming out of the turn. But he always crashed in the turn, then lost 2m with getting back to middle of the track and he no time to buildup speed. It's a smooth jump that you can't make without going fast. Preloading the spring with accelerating on the jump has almost no benefit since you need speed to make it.

You don't need a fast motor to be fast. You need to drive consistent, smooth. If you can come out of a turn very smooth, then you don't need to speed up as much then when you're hassling through the turn to clear a jump.

Randy_Pike

iTrader: (6)

If you ran a 2050 in your car and got beat by a Nitro buggy it wasn't geared correctly, period.

There's a reason why the top pros choose the 1900 or 2050, it's more than fast enough.

dabeav

i run 2650 on 4s and get 20 to 25 min run time ita way way way overpwered i am down to a 13 tooth pinion and still a rocketship nobody can touch me out of corners an gettin close to end of strait im already hard on brakes and gone when they get back on throttle takes alot alot of finess to master 2650 motor

hairymuffin

iTrader: (105)

I run the castle system 2650..it is not to fast for me on my indoor track... Have my esc set up kinda soft which i think is key......i do wanna try a 1700 tekin to see if i better my times

prestondan

iTrader: (1)

To be truly blunt and honest...it is too much motor. I can't remember ever racing on a track and pinning the throttle with the EPA at 100%. maybe if I raced on a BMX track, but at the 3 tracks I run on and my practice track in the backyard I try to set my gear up to run fast enough to win, but use my castle link or EPA to limit the total power while allowing me to use the full range of the throttle. On a tight, technical track if I did not limit my power I might have to drive using 30/40% of my throttle range. That makes it very easy to squeeze a little too much throttle and make mistakes. Fast racing is clean racing, so anything I can do to keep it between the pipes makes me more competitive.
I could use different motors or carry a huge gear assortment, but I am a part time weekend racer and I like programming and EPA restriction as a speed control. The Castle 2650 runs cool for me, and if I ever have the urge to blast out some high speed banzai runs that option is on the table.

prestondan

iTrader: (1)

Plus I don't want to change motors... I got a good one.

blade329

iTrader: (114)

You thought the 2050 was soft? You don't have it geared right then. A lot of the pro drivers use 2050. None of them use the 2650kv, for a reason. I run a 1900kv, nobody passes me on the straights and there hasn't been a jump I've met that I couldn't make. I run a large track with a 200' straight.

cnelson3

iTrader: (66)

i ran all day on a 2650 system again today. it's controllable and the power is nice. This entire thread is opinions from various racing backgrounds. I ran a 12 main with no problems. The only bad side i see is that it does hammer that battery. after a 6 min qualifiers, i'm down about roughly 2000 Mah.

it's not a motor for someone who wants to mash the throttle tho.

Roodster

My son just got his first 1/8 buggy ( Tekno is letting him run it) we borrowed a Tekin 2650 and everybody said it was too fast on top and not smooth. He raced it this last Sat. At the Top Notch series in San berdoo and Won. I almost bought a 2050 but he said he likes the power of the 2650.

egobrkr

iTrader: (29)

Shouldn't you use the voltage that the lipo has at full charge to get the you rpm? A 4s is 16.8 volts at full charge.