Go Back  R/C Tech Forums > General Forums > Electric Off-Road
Brushless HPI RS4 MT >

Brushless HPI RS4 MT

Brushless HPI RS4 MT

Reply

Old 10-18-2007, 01:48 PM
  #1  
Tech Initiate
Thread Starter
iTrader: (7)
 
Join Date: Sep 2007
Location: Central KY
Posts: 38
Trader Rating: 7 (100%+)
Default Brushless HPI RS4 MT

I am throwing together a brushless MT. I know I'll prolly have some durability probs, but I deal with them as they come. I plan on doing similar upgrades as those shown on this site to help with that: http://home.wanadoo.nl/michaelirschick/

What type of brushless setup would you recommend? I won't be goin lipo for a little while, so take that into consideration as well.

Maybe the Mamba 5700? 7700 is a bit much I believe...

Thanks!
dustyz is offline  
Reply With Quote
Old 10-18-2007, 06:22 PM
  #2  
Tech Adept
iTrader: (16)
 
Join Date: Aug 2007
Posts: 245
Trader Rating: 16 (100%+)
Default

VXL or the MM ESC w/ an Orion Vortex BL motor.
kavvika is offline  
Reply With Quote
Old 10-18-2007, 07:09 PM
  #3  
Tech Initiate
Thread Starter
iTrader: (7)
 
Join Date: Sep 2007
Location: Central KY
Posts: 38
Trader Rating: 7 (100%+)
Default

I can understand the VXL... considering it is installed in the Rustlers, but what's the reasoning behind swapping the MM motor with a Orion Vortex?

Any little bit helps me understand more... thanks!
dustyz is offline  
Reply With Quote
Old 10-18-2007, 08:50 PM
  #4  
Tech Adept
iTrader: (16)
 
Join Date: Aug 2007
Posts: 245
Trader Rating: 16 (100%+)
Default

I did a few weeks worth of research and I heard many stories of the Mamba Max motors overheating. It's possible that it was user error, but when I looked into the orion motors, with their internal fans, even when geared extremely high, I found they stayed much cooler. I'm a huge fan of the Orion 6.5BL motor I have, and when geared 23/86 in my Rustler (which I do realize is too high) the temperatures never went above 150 or so. The mamba motors seem to be quite finicky, and regularly hit 180 or so even when geared 16/86. I have had cogging problems, it seems the MM ESC does not like to drive an overgeared motor, and it will take much more tweaking before I can be satisfied with it. It is somewhat frustrating, and if the new batteries I bought don't help, I might just end up selling the ESC and buying a VXL ESC or just outright picking up the whole VXL package. Traxxas did their homework, and for such a low kv system, the performance is impressive. Absolutely no cogging, and in a race, a VXL Rustler was able to keep up with mine. Now when it was in my RS4 MT (before I crashed it into a car) I had no problems with cogging and it was geared slightly higher. I would stay away from a sensored system like a Novak or LRP if you ever want to go above 6-7 cells, but I believe that's all that can fit in a MT unless you go lipo. That's why the VXL ESC, IMO, is the best of both worlds. The cheezy case design and larger size kept me from purchasing it in the begining, but it is the only sensored ESC on the market that can run up to 9 NiMh cells or 3s Lipo.
kavvika is offline  
Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service