RX8 Race Report

[tom255]

I tried once 3S battery on XT8 wit 2200KV motor and tried to gear it up to stay par with nitros and 5100mAh battery didnt last 10min at all and pack was overheating. So nothing to expect from 3S. Go for 4S and you will be satisfied with with perfomance. Maybe on buggy its OK but for truggy its definatly not enough. If pack can deliver enough amps it will be definatly hotter setup than on 4S.
I think real potencial of RX8 system starts from 4S battery

[JThiessen]

Good report, but I am quite suprised that you chose to run these without at least some bit of "test and tune" - "At least not on a race day with everyone eyeing and curious about the performance of a converted 1/8 in a race setting......."

[TexasSP]

I would have thought being the combo and all the RX8 would have come kind of pre set for the T8, or maybe it does. I am just thinking out loud here.

Nice report though. Most reports I have seen have not done it back to back same race day and same racers exactly as you had. That's pretty consistent.

This report would some up what my theory is on the two systems. The RX8 has some things better than the MMM and the MMM has some things better to the RX8 without either being vastly superior/inferior to the other.

I would love to try one, but don't see myself spending the extra money on the RX8 when the MMM does everything I need and more.

[superek4]

R those temperature in degrees or F?

[Unsullied_Spy]

Originally Posted by superek4

R those temperature in degrees or F?

Those are definitely Fahrenheit. That hot in Celcius would be seriously bad!

[tedo]

Originally Posted by TexasSP

I would have thought being the combo and all the RX8 would have come kind of pre set for the T8, or maybe it does. I am just thinking out loud here.

You have to do the manual or Hotwire tuning. It is not a plug and play system.

However, if you have the Hotwire, everything is programmable on 1 screen. Super, super easy. Then if you needed to do manual track tuning (throttle curves, etc..) the RX8 is pretty easy.

Oh, and timing makes a big difference in performance. I have mine dialed down to 8 degrees. Doesn't hesitate though like Bustafied's... I have the linear throttle curve selected, I just feather the throttle. Takes off instantly.

Bustafied, great race review. Personally, I would get the system worked out ALONE first, haha, before you show up at a race and figure it out in a main.

[glassdoctor]

Buddy of mine is running a Tekin system and I've taken a few laps with it too. It runs really smooth and throttle response is crisp... no lag time, etc. He is very happy with it.

I'm running Castle MM/MMM and Neu motors and they are still working good for me. I also have run the MM Pro and it's very nice too.

[suicideneil]

Swine!

[TexasSP]

Originally Posted by glassdoctor

I also have run the MM Pro and it's very nice too.

Originally Posted by suicideneil

Swine!

Enough said.

Originally Posted by tom255

I tried once 3S battery on XT8 wit 2200KV motor and tried to gear it up to stay par with nitros and 5100mAh battery didnt last 10min at all and pack was overheating. So nothing to expect from 3S. Go for 4S and you will be satisfied with with perfomance. Maybe on buggy its OK but for truggy its definatly not enough. If pack can deliver enough amps it will be definatly hotter setup than on 4S.
I think real potencial of RX8 system starts from 4S battery

Hmm...I've had no problems with my 3S pack. Truth be told, I'm satisfied with the performance on 3S. Then again, I'm running a 2700KV motor compared to the 2200KV you have. That could also be a factor.

Another possibility is that the "C" rating of your 3S pack could be a bit low.


And it could also be that maybe the nitros here are slower compared to the ones you run with.

4S on my truggy is great...but it's overkill for the track.


Just my two cents.

Originally Posted by JThiessen

Good report, but I am quite suprised that you chose to run these without at least some bit of "test and tune" - "At least not on a race day with everyone eyeing and curious about the performance of a converted 1/8 in a race setting......."

Thanks! :)


Yes...I should have looked further into it. Then again, this is my first foray into "sensored" applications. The concepts that I thought would normally apply didn't. Oh well.


Perhaps more adjusting with the TP and timing is in order.

Originally Posted by TexasSP

I would have thought being the combo and all the RX8 would have come kind of pre set for the T8, or maybe it does. I am just thinking out loud here.

Nice report though. Most reports I have seen have not done it back to back same race day and same racers exactly as you had. That's pretty consistent.

This report would some up what my theory is on the two systems. The RX8 has some things better than the MMM and the MMM has some things better to the RX8 without either being vastly superior/inferior to the other.

I would love to try one, but don't see myself spending the extra money on the RX8 when the MMM does everything I need and more.

Hmm...good thinking. Seems logical to me...makes perfect sense, actually. I dunno why Tekin would leave it out. It could also be that they're (Tekin) letting the racers set their own profile and responses to adjust for each track.

Thanks...and I agree with you. The RX8 does have some points over the MMM, and MMM has it's point over the RX8. The systems are so similar that neither gives up more than a hair to the other. WITH the exception of the cog-free starts in sensored mode. But then again, comparing the two modes wouldn't be an "apples to apples" comparison.

I've tried the RX8, and quite honestly, unless you're a full blown racer with a sponsorship on the line, I think the MMM would suit most needs. It'll definitely work for the club racing stuff...but when we're talking regionals and national qualifiers, the RX8 would be the way to go.


If only they could squeeze more power out of the 2650, though. Then, it'd be golden.

Originally Posted by Unsullied_Spy

Those are definitely Fahrenheit. That hot in Celcius would be seriously bad!

ah yes...thank you. :)


I had forgotten about some of the members here who use celsius instead of Farenheit. My apologies.

[crazyjr]

If you're running this in a truggy, you're running the wrong motor. You should be running the 2200kv truggy motor at max, not the 2650 buggy motor. Personally I'd run the 1500-1700 in 4 to 5s before running a 3s setup in a truggy

[_paralyzed_]

excellent feedback. I hope you stick around awhile!