Top Tips to select the best motor for RC rock crawling || Holmes Hobbies || Best Motor Math 

2 weeks late but here's the short answer, kerosene works as a lubricant and detergent, it cleans more of the carbon off the stock brushes than plain water, and it also allows for a more gentle/slower seat in of the brushes to create better contact. But this also shortens the life of the motor, however in racing it really doesn't matter since you're changing them out regularly. And at $20 who cares. Haha

yep!

I understand, we have lots of other vids too

awe yeah!

3500 puller was developed for the Wraith 2.2. 2700 is still pretty dang fast

@@HolmesHobbies thanks John!

@@Cooldibs I run the 3500kv puller pro with a 10t pin and its perfect. It's slow for crawling yet has the power and speed to do a backflip of small stumps and such bashing around. I have 3 wraith 2.2 rigs and love them. The 2700kv 10 shooter is another amazing motor for the wraith. Can't get any smoother slow crawling then those. But needs 4s to have the wheel speed most want. I've even ran my wraith on 4s with the 3500kv pp. It never got hot. Even ran it around the yard in tall grass and full throttle up and down the road a few time's and only got to 130° temp on the motor. Esc hit 150° witch was fine. Just gear down and injoy !!!!

Right on!

glad u enjoyed and found it helpful

Nay, way too slow and weak to even make it on my bench, lol

@@HolmesHobbies lol just thought id ask.

​@@stompindakka3222man I sure hope nobody ever gets saddled with anything more than 35t in any crawler. Otherwise they are painfully slow. My son's 1.9 wraith has almost 400 miles on a 27t 540 trailmaster sport(good balance between speed and power on 3s.) But I've also used the 12t trailmaster 550(my favorite) trx4 21t trailmaster 550 wraith,and a 12t crawl master Vattera ascender. All have tons of miles, and none were as much as the rc4wd.

My absolute favorite has been a 12t trailmaster 550 trx4, or my scx10ii with a 21t 550. Always 3s.

Some people don't want all that wheelspeed. Slower motors are easier to control.

Also possibly to a small extent efficiency, higher turn motors with higher voltage will have less wasted power. Not a great trade IMO, the higher voltage also wears the brushes faster. Don't forget not all applications have so many gearing options readily available.

@@HolmesHobbies so than what about 85t to 55t those are beyond slow when geared down. Is it just the simple fact that people will buy it so there is a supply? Or is there a reason for those?

Go higher than 1500kv or use a faster brushed motor like a 30t or 27t

@@HolmesHobbies I did! Probably too much but I’ll gear down if I need too. I got the Magnum 11t yesterday. Can’t wait for it to get here. Thank you!

I’ve come to realize it’s not speed I need. I just want quality and I definitely think I made the right choice this time in the Magnum

I still have the tekin 35 I can go to if it’s too fast for me.

Broke the Magnum in yesterday. It’s all ready to go. Can’t wait to get outside and climb

Moa? Some puller 400 or 500s or magnums

@@HolmesHobbies Yep it's a Krawler I built mid 2000's & was featured in RC Drive & Car Action. There's video of it on my channel I recently shot. Thank you for the info. I'm trying to stock up on some parts.

Honestly, if those motors aren't worn out I'd just keep using them unless you want to save them. Since it's not a comp rig you could use about any 540, something like a regular torquemaster or crawlmaster would be just fine.

@@HolmesHobbies I need brushes & can't find them like most parts that are broke or cracked. Thanks a lot for being honest & letting me know that! I much appreciate that! I would like to just keep using them. I built 66:1 reduction units but I can't even source an 8T 32p pinion with a normal 1/8" motor shaft so I went with a hardened 9T hopefully it works.

@@HolmesHobbies Can you turn the end bell 180 degrees to reverse the rotation on those motors you mentioned? I need to be able to do that for the Clodbuster.

13t 550 and 16t 540 is the golden zone

@@HolmesHobbies I have a 11T 540 CrawlMaster Pro in a portal rig. Sometimes I feel like it is "squishy" when I need more torque. Are you suggesting a 16T is a better balance between wheel speed and torque?

Yes, I've designed them. Practical? Not really.

@@HolmesHobbies If you had a choice to buy an X-maxx for $500 or an 81 Honda for $500 which one would you buy. Which one is more practical? I am interested in this brushed outrunner technologies 🤔

LMAO was just thinking of those "worlds simplest motor" where you have AA batter sitting on a magnet and you can bend a paper clip to make it rotate around the battery... This is totally an outrunner motor!

Lol

5 slot?

Manufacturers customer hotline?

Our website form or email

I've had to contact customer service and emailed them and got a response by the next day and everything was worked out and I was very happy with my experience.

@@HolmesHobbies Thank you