Well, we shall see. The T8's torture test will be this weekend. :whip:

If she cannot perform, then she shall be promptly kicked to the curb with a "For Sale" sign behind her.

aaah....I see! So...the lower the KV, the higher the torque and the bigger the can.

So if I wanted a stupidly powered buggy, then I should use a truggy motor in my buggy, aye?

Well, well...we shall see. Looks like I might hafta sell the 2650 and pick up a lower KV T8.

Alright...here's the weaopnry for the weekend:

Vehicle:
Hyper 7

ESC/Motor:
Tekin R1-Pro, modified with bigger capacitor installed and 35v UBEC
Tekin T8, 2650kv (sensor cable removed)
No fan will be installed for either motor or ESC

Pinion/Spur:
15t pinion, Spider center diff with 50-something tooth spur. I'll take a closer look tonight or something.

Tires:
HoBao Buggy rims, Losi Step Pins (silver compound)

Diffs: (most likely they will all be bumped up by 2K, but we shall see)
7K center
5K front
3K rear

Batteries:
PolyQuest 2S, 25/50c 5100mAh
ThunderPower 2S, 40/80c 5000mAh
NeuEnergy 3S, 25/50c 5000mAh
ThunderPower 3S, 40/80c 5000mAh
SMC Racing 4S, 40c (no burst or continuous was spec'd), 5000mAh


I'll let you guys know how it goes.

Hokay. So this weekend wasn't too bad. I got to run the buggy in another club main, and she did ok.

Correction to the diff fluid:

Center: 5K
Front: 3k
Rear: 1K

Spur: 46t Spider center diff

Ran the buggy on 3S (TP 40/80c 5000mAh), and she did alright. Also ran the T8 with out the sensor lead...seems to perform similar to a Neu. Didn't have too many problems with temps.

Motor: 142
ESC: 125
Batt: 105

Ran 2 10min mains. Not too bad, setup was still cogging a bit (a little more than the Neu). Power delivery is so-so. I ended up swapping out the R1-Pro for the RX8. The R1-Pro is a tough lil bugger for sure, but she's just not capable of handling the current draws of 4S. Either that, or my gearing was all out of whack.

But...overall, my observation still sticks from last weekend: I'll stick to Neu.

I also had a chance to run my X1-CRT in a couple of mains. I'm pleased to say that the RX8 didn't hiccup one bit on 4S and I was even doing well enough to place first in the three mains we ran. My mentor flamed out early, and I was able to hold my own against two Mugens and a X2-CRT.

The 4s (SMC 40C 5000mAh) is nuts...but interestingly enough, the temps were lower.

motor (Neu 1515/1.5D/F) : 125F (4s), 135 (3S)
ESC (RX8): 123 (4S), 126 (3S)
Batt: 4S: 105
3S: 120



SO...in closing, I am not too impressed with the T8 series. Perhaps I need to try a lower KV motor, but from what the 2650 has shown me, I am more incline to stick with the Neu. Although, to her credit, the T8 was an absolute monster on 4S in the buggy. First time I seen the buggy wheelie. Usually, with the Neu, I get nothing but wheelspin and paper plates. The T8 was a fraction less powerful than the Neu, which I think enabled the tires to hook up and loft the front end. Not too bad, but my vote is with Neu for now.


SO....anyone want to purchase a T8 2650kv motor from me? :neutral: I'll price it fairly. Open to trades as well.

I'm not sure what to think on that, running that tekin motor on a buggy should have been right, even the temps were higher. That is wierd

Well its quite obvious that the 1515 1.5D would win out in power because it is a bigger motor internally and equivalently a lower wind. A fair test would be your T8 against the 1512 1Y, which is the most simliar of the neu motors, and in fact, pretty identical internally. But just wait until the stiff wires on the Neu fatigue and cause a short, or dirt eventually gets into the holes. Those are two things you will not have to have to worry about or deal with/prevent with the tekin.

aah...I see. So far I've been blessed with a rather sturdy Neu...the wires haven't flexed all that much.


I guess I should shoot for a lower KV T8 and see how it goes from there. :neutral:

True.

Then again, it also feels as if there is some lag in the drive train. I've checked my mesh and looked for stuff in the diffs, but I haven't found anything. :neutral:

Eh...regardless. I now have a T8 motor that I'm looking to either sell or trade.

Race report - 1 rotor came apart after 20 minutes of racing, second rotor came apart after like 3 minutes. Last motor (on my car)so far lasted 40 minutes and seems ok. I fixed both rotors with loctite 648 to get my friends through race. After few minutes both moved by like 1mm but lasted through the rest of the racing day. Well loose rotors were nothing compared to cracked magnet on one 3670 medusa motor.

i need to change the throttle profile to much more aggresive, but so far I am quite happy with the RX8. even without fan it stayed cool and I was running 6 seconds faster laps than with my nitro mugen last year at the same track

And the efficiency of the T8 motor is incredible. It consumes less mAh then my old neu 1512.

Just those rotors........

Has anybody used the RX8 with a Neu 1509 or 1512 and can let me know how well the control is working?

Wallot - Sorry to hear about those rotors.


Thomas - I would think that the 1515 would run similar to the 1509's and the 1512's. From what I noticed, there was a bit of cogging going on. The MMM had less cogging. My RX8 is currently dead...she gave up the ghost just this past Sunday. Bugger.


Guess I'll be running my Hyper 7 with the R1-Pro in it for this weekend.

Do you have a truggy motor? I am using a 1512 right now and am finding it's getting too hot for my liking and for it's own good at times.

Check my other thread "looking for motor for racing....", something to that extent.

What are your old temps and what are the new T8 temps running similar setup?

cheers

yes i have the truggy motor. We run only short 6min mains like you do in 1:10 offroad and after 7 minutes everything is nice and cool on touch. will try not to forget check temps next time.

Would the 1700kv. be too much on 6s lipo? Or should I consider the 1550Kv. model?

For racing yes. The 1550 should be ok, but the 1350 may be even better.

Kv. for Kv. and same voltage on each motor, which is capable of more power, and which runs cooler? A 1515 Neu, or a T8 truggy? I have heard they are pretty close for power, but the T8 has slightly higher efficiency?