RX8 or MMM combo?

[TexasSP]

Good luck and I don't think you can a wrong choice between the two. I am sure you will be thoroughly pleased with it as Tekin makes fantastic products.

[Unsullied_Spy]

I'm sure neither is a wrong choice, it's just more tempting to experience the RX8 and have something totally new than buy something that I already know is great

[pinkpanda3310]

I think you sum'd up that thread nicely Unsullied_Spy

[kalbien]

Originally Posted by Unsullied_Spy

I'm sure neither is a wrong choice, it's just more tempting to experience the RX8 and have something totally new than buy something that I already know is great

agreeed! only thing left is, where the hell can I buy one? Combo is nowhere in the world and I want to try that new toy .... and after reading all threads I was able to find, I am not 100% sure that RX8 will be worth extra money, but I am 100% sure that I am going to try it

i just picked up a 2650 motor to run on my origanal MM in my losi 8, runs good, seems to be as powerful as my 2d was, i wasnt really impressed with the speedo tho, i cant tell a difference between that and my setups

well, I just received my RX8 combo from Mike (THANKS!!!), I'll try and put out my opinions after next week sunday. Prior to this, I was running the MMM/1.5D combo. Let's see how the RX8/2650 combo works.

Should be interesting, too...the X1-CRT will be going head to head with three other truggies...two X1s and one X2. ALL of them are running the Novarossi Hollinger Edition motors.

should be interesting to say the least. I had a blast with the MMM/NEU combo, but now it's time to try something different. I'll be sure to let you guys know how it went.


I'll try to see if I can take pictures, too.

[Unsullied_Spy]

Originally Posted by BUSAFIED

well, I just received my RX8 combo from Mike (THANKS!!!), I'll try and put out my opinions after next week sunday. Prior to this, I was running the MMM/1.5D combo. Let's see how the RX8/2650 combo works.

Should be interesting, too...the X1-CRT will be going head to head with three other truggies...two X1s and one X2. ALL of them are running the Novarossi Hollinger Edition motors.

should be interesting to say the least. I had a blast with the MMM/NEU combo, but now it's time to try something different. I'll be sure to let you guys know how it went.


I'll try to see if I can take pictures, too.

Keep us posted.

Originally Posted by kalbien

agreeed! only thing left is, where the hell can I buy one? Combo is nowhere in the world and I want to try that new toy .... and after reading all threads I was able to find, I am not 100% sure that RX8 will be worth extra money, but I am 100% sure that I am going to try it

I'm waiting for them to come in stock at my LHS, they've got one or two on back order. The Buggy I'm putting it in is a works-in-progress and every other one of my RCs is broken right now so it'll be a while before I get back to work on it. RX8 should be available by the time I actually need it.

Originally Posted by Unsullied_Spy

Keep us posted.



I'm waiting for them to come in stock at my LHS, they've got one or two on back order. The Buggy I'm putting it in is a works-in-progress and every other one of my RCs is broken right now so it'll be a while before I get back to work on it. RX8 should be available by the time I actually need it.

just a little snippet:

got all my soldering done for the RX8, can't believe I ran out of solder for the motor wires. not too sure how that happened.

ennyhoo, had enough solder to do the wires on the RX8. I don't know why Tekin recommends a dinky 4mm connector...that don't make any sense to me. On top of that, there were no connectors supplied. I mean, it's probably just a tiny little gripe, but I would think that for the amount of money we spend on a combo they would have at least humored me with some connectors. Meh...that's just me, though. I used the CC 6.5mm connectors instead.

Since I couldn't run the 2650, I just hooked the RX8 up to the trusty 'ol 1.5D. Strapped in a NeuEnergy 3S and away we went.

I did not fiddle with ANY of the settings on the RX8. Plugged it into my HotWire, but it wasn't able to pull it up. Odd...guess I'll look into later on.

And so...what happened?

[_paralyzed_]

what happened?

damnit. Got logged off while typing. Anyways, here's what happened:



Well, the truggy tried to take off like a bat out of hell. At least, that's what the throttle trigger was telling me. It cogged a little bit, and then hesitated for just a little bit more. Hmm...seems the same as the MMM in that regard.

Took it out on the street (mind you this was around 2am), no body, and let her rip. Was pleasantly suprised by the power wheelie I observed. Truggy was geared with stock center spur, 11T pinion. Don't have a data logger, but from what I saw on the speed and power, it appeared that the RX8 might be a tad down on the power department compared to the MMM, but I remembered that I didn't have a chance to goof around with the settings on the RX8. I don't know if messing with the throttle curves will make up for that much, but we'll hafta see. From what it looks like, the MMM may have an edge in that department. Throttle delivery appeared to be the same...a linear profile.

So, after running on the street for a good 10mins at full tilt, I brought her in for my tried-and-true temperture check by hand.

Motor was only starting to get warm (I'd venture around 100deg), the RX8 only had 2 LEDS lighting up (I didn't install the fan, either), and the battery was cooler than the motor. Not too bad, RX8...not too bad.


I'm going to try to get the Hotwire to detect it again (do I need an update for it?) and see if I can play with the settings. Sunday will be the big day...we'll see how the RX8 performs in a race setting.


Just thought I'd share a little preview with y'all.

just wanted to reiterate that this was done with an RX8 and a NEU 1515/1.5D.

[Unsullied_Spy]

Thanks for sharing your experience with it.

m'kay...ran two more tests last night. Also had a chance to goof off with the settings, but didn't try via Hotwire. Adjusted values through esc buttons. #3 Throttle Profile, No Limit on Current Limiter, zero Drag Brake.

RX8 (still no fan installed)
Neu 1515/1.5D/F
NeuEnergy 3S 5000mAh, 25/50c
11T pinion
stock center spur
X1-CRT
BBT rims
LPR Bowties
LPR Crimefighter



Test 1:
ran for about 8mins, full tilt up and down the street. Almost zero wheelspin, so I know the ampdraws were decent. Still hesitates at times on start up. Most evident when letting the truck roll to a stop in reverse and then hit the throttle WFO.

temps:
motor - 124
RX8 - 115 (two leds flashing)
batt - 100


Test 2:
Changed out pinion to 14T, ran it for another 8mins. More speed, still tries to lift the front. Got to see the LVC in action on the RX8...it slows down considerably, first. Then it starts to cut throttle. Still cogs...but then again, so did the MMM.

temps:
motor - 118
RX8 - 123 (still two leds flashing)
batt - 110


hope this helps.

[TexasSP]

So seeing as how we have apples to apples, how do you feel about the start up on the MMM running the neu versus the RX8? Also have you done it with the latest firmware update on the MMM that was just released?

Originally Posted by TexasSP

So seeing as how we have apples to apples, how do you feel about the start up on the MMM running the neu versus the RX8? Also have you done it with the latest firmware update on the MMM that was just released?

Negative on the latest firmware. The MMM finally gave up the ghost about 3 weeks ago due to the upper case releasing itself from the lower case and then having it's PCB have some little transistor thingies get knocked off. :( Ran a R1 Pro for the meantime...now it has been replaced with the RX8.


In regards to the startup, it appears to me that the MMM may have the edge in terms of being able to run both sensored and sensorless motors. The RX8 seems to cog just a hair more than the MMM did...which wasn't too many times.

In terms of power delivery, it also appears that the RX8 might be a hair shy of the MMM. I don't have a data logger or Eagle Tree to support this (although if anyone wants to send me theirs to borrow, feel free - I promise I shall return it in perfect working order), but it's just what I appear to observe. I'll take a further look into the RX8's settings...it could also be that perhaps I'm not doing something right.

So far, it's not too bad. I'm a little disappointed, mostly due to it seeming to be more or less the same as a MMM. With the $334 price tag, I could have gotten 2 MMM's.


BUT.....I shall withhold my final judgements on the system AFTER I properly race the RX8 and run it with the sensored motor.

I shall strive to both this weekend.