RX8 or MMM combo?

[Unsullied_Spy]

Originally Posted by jhautz

Sounds like you know what you need then.

Sure the MMM is nice, but since I already have one I could always try out the RX8. Is there anything to the RX8 other than sensored start-up? If I'm going to spend the extra $70 for one I'd like to get something extra out of it. I do like that they make lower KV motors for them, I'd like to run 5s in it sooner or later and that would push the 2650 too far.

[whitrzac]

Originally Posted by Unsullied_Spy

Sure the MMM is nice, but since I already have one I could always try out the RX8. Is there anything to the RX8 other than sensored start-up? If I'm going to spend the extra $70 for one I'd like to get something extra out of it. I do like that they make lower KV motors for them, I'd like to run 5s in it sooner or later and that would push the 2650 too far.

210amps continuous, solder posts, better quality, better everything except the warranty


something to think about, but dodge(known for tranny failures) has a lifetime warranty on the drivtrain, ford, toyota, honda, etc don't...


BTW the tower super saver club has a 60 off of $300 now...

[Aceldama]

Originally Posted by Unsullied_Spy

Sure the MMM is nice, but since I already have one I could always try out the RX8. Is there anything to the RX8 other than sensored start-up? If I'm going to spend the extra $70 for one I'd like to get something extra out of it. I do like that they make lower KV motors for them, I'd like to run 5s in it sooner or later and that would push the 2650 too far.

I've been tossing around the idea of MMM vs RX8 for a while now and here's what I've come up with:

-I plan on running 6s and there isn't a MMM motor that fits this application. So I either need a Neu, which is going to drive up the cost (to well over the cost of an RX8). Or I need a Medusa which isn't an ideal off-road solution due to the open can and non-captured end bells. The RX8 has a great selection of KVs (even if they seem to be a bit underrated by a variable amount of KV depending on who you ask).

-MMM includes the castleLink and RX8 requires that I pay an additional $35 for hotwire which, honestly I feel is a bit of "nickle and dime" for an already $340 system.

-There are tons of MMMs out there but there are also lots of failures. There aren't a lot of RX8s out there but I haven't heard of one failing yet.

-Sensored vs. sensorless: All of my systems have been sensorless and they perform great. I have tried my friends sensored Novak on his 18T and while I do notice the smoothness in the throttle it doesn't add up to anything in our street races. On the other hand, I feel it's better to have it then to not have it.

What is pushing me toward the RX8 is really the motor selection. I don't feel like hunting down and then paying for a Neu with a bolted can. And 2200kv is just way too much for 6s. And until I hear about an RX8 going up in smoke I consider it the more reliable system (just give it a month...).

[_paralyzed_]

Originally Posted by Aceldama

And 2200kv is just way too much for 6s.

umm, it was made to run 6s. not too much

[Aceldama]

Originally Posted by _paralyzed_

umm, it was made to run 6s. not too much

55,000 RPM at 25v is a bit much. And it sure doesn't leave you with a lot of gearing options. I don't think anyone on this forum would recommend a 2200kv motor for 6s.

[_paralyzed_]

Originally Posted by Aceldama

55,000 RPM at 25v is a bit much. And it sure doesn't leave you with a lot of gearing options. I don't think anyone on this forum would recommend a 2200kv motor for 6s.

e-revo, savage flux. 2200kv, designed for 6s usage. 55,000rpm is nothing for a neu. I understand what you're saying. But 6s on a neu 2200kv is no problem

[Aceldama]

Originally Posted by _paralyzed_

e-revo, savage flux. 2200kv, designed for 6s usage. 55,000rpm is nothing for a neu. I understand what you're saying. But 6s on a neu 2200kv is no problem

I'm not saying it can't be used. I'm saying it's far from optimal. I mean, Neus are rated for 60,000 RPM and I'd rather not be pushing it to the edge of what it's rated for. I don't want a 2200kv motor on 6s when something closer to 1600kv is a much better match.