R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric Off-Road

Reply
 
Thread Tools Search this Thread
Old 02-18-2011, 07:33 PM   #1
Tech Regular
 
Dougoilman661's Avatar
 
Join Date: Oct 2010
Location: Bay Area, CA
Posts: 339
Trader Rating: 13 (100%+)
Default Stupid fast

I was Lookin to make my CRT.5 stupid fast and made a stupid choice. I bought a castle 6900 system thinking this would do it. Well it didn't. Now I'm wondering what would be better to make it 65 mph+ fast.

Thinking of getting the MMM 2650 designed for 1/8 buggies. Would this combo be what I'm looking for or what wil I need?
__________________
Be the change you want to see in the world
Dougoilman661 is offline   Reply With Quote
Old 02-18-2011, 08:05 PM   #2
Tech Elite
 
T. Herwig's Avatar
 
Join Date: May 2009
Location: Somerset, PA
Posts: 2,373
Trader Rating: 25 (100%+)
Send a message via AIM to T. Herwig
Default

Quote:
Originally Posted by Dougoilman661 View Post
I was Lookin to make my CRT.5 stupid fast and made a stupid choice. I bought a castle 6900 system thinking this would do it. Well it didn't. Now I'm wondering what would be better to make it 65 mph+ fast.

Thinking of getting the MMM 2650 designed for 1/8 buggies. Would this combo be what I'm looking for or what wil I need?
You would be better off with a 2200kv rather than the 2650kv.
I recommend no more than 4S for racing with this motor, but if you want to go stupid fast there ya go.
__________________
Tyler Herwig
Tekno RC teknorc.com ∙ JConcepts jconcepts.net ∙ Spider Hobbies spiderhobbies.com ∙ SMC smc-racing.net ∙ Upgrade RC upgrade-rc.com ∙ Kustom RC Graphics kustomrcgraphics.com
T. Herwig is offline   Reply With Quote
Old 02-18-2011, 08:16 PM   #3
Tech Regular
 
Dougoilman661's Avatar
 
Join Date: Oct 2010
Location: Bay Area, CA
Posts: 339
Trader Rating: 13 (100%+)
Default

I'm going to have a setup for racing and bashing. I want the MMM for bashing and the Sc for racing. Out of the 2400 and 3800 Sc system is the 2400 faster?
__________________
Be the change you want to see in the world
Dougoilman661 is offline   Reply With Quote
Old 02-18-2011, 08:30 PM   #4
Tech Regular
 
SLO county race's Avatar
 
Join Date: Oct 2008
Location: San Luis Obispo, CA
Posts: 423
Trader Rating: 3 (100%+)
Default

Quote:
Originally Posted by Dougoilman661 View Post
I'm going to have a setup for racing and bashing. I want the MMM for bashing and the Sc for racing. Out of the 2400 and 3800 Sc system is the 2400 faster?
lowe4r the kv level is less speed but more torque and vice versa
__________________
Tekno EB48.3-Losi SCBE-Rc10B4-Rc10T4.2
Rc10 B5m FL
SLO county race is offline   Reply With Quote
Old 02-18-2011, 08:38 PM   #5
Tech Regular
 
Dougoilman661's Avatar
 
Join Date: Oct 2010
Location: Bay Area, CA
Posts: 339
Trader Rating: 13 (100%+)
Default

So then the ideal setup would be a mmp with a 3800. The mmp would enable me to run cooler
__________________
Be the change you want to see in the world
Dougoilman661 is offline   Reply With Quote
Old 02-18-2011, 08:42 PM   #6
Tech Regular
 
SLO county race's Avatar
 
Join Date: Oct 2008
Location: San Luis Obispo, CA
Posts: 423
Trader Rating: 3 (100%+)
Default

Quote:
Originally Posted by Dougoilman661 View Post
So then the ideal setup would be a mmp with a 3800. The mmp would enable me to run cooler
ya i guess. thanks kinda like a traxxas velinion motor if not a tad faster. i think that motor is a 3500kv?
__________________
Tekno EB48.3-Losi SCBE-Rc10B4-Rc10T4.2
Rc10 B5m FL
SLO county race is offline   Reply With Quote
Old 02-18-2011, 11:26 PM   #7
Tech Initiate
 
Join Date: May 2010
Posts: 32
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by SLO county race View Post
ya i guess. thanks kinda like a traxxas velinion motor if not a tad faster. i think that motor is a 3500kv?
Much better motor than the velineon; 4 pole neu, compared to a 2 pole s-sized feigao.

Quote:
The vxl motor has a shorter magnet and windings than a S can feigao... So technically it is an XS motor... Similar power output though.
MMP +3800 on 3s will get you get you 53mph on 4" tires with a 16t pinion.
silentbob343 is offline   Reply With Quote
Old 02-18-2011, 11:48 PM   #8
Super Moderator
 
racer1812's Avatar
R/C Tech Elite Subscriber
 
Join Date: Nov 2008
Location: RIP 'Chopper', 4/18/13 miss you bud:(
Posts: 14,777
Trader Rating: 31 (100%+)
Default

pick a thread...

Brushless math
__________________
Stand for the flag, kneel for the fallen.

Thank you to all of our service men and women!

racer1812 is offline   Reply With Quote
Old 02-19-2011, 12:30 AM   #9
Tech Initiate
 
Join Date: May 2010
Posts: 32
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by racer1812 View Post
pick a thread...

Brushless math
Good points in the other thread, speed calcs aren't hard and fast, but can be used as a starting point.
silentbob343 is offline   Reply With Quote
Old 02-19-2011, 12:49 AM   #10
Tech Master
 
84 GT 5.0's Avatar
 
Join Date: Apr 2010
Location: Fresno California
Posts: 1,303
Trader Rating: 26 (96%+)
Default

first pick voltage doug. 2s 3s 4s? for 3s and 4s speed runs go mmm/2650 it will be stupid fast and will handle 6s if monitored closely. also on 3/4 s it will stay ice cold
__________________
JQ THE Car YE teknoV4/xerun150/t81400/savox1256tg
Tamiya TRF-416/s6040/vipervtx10R/ killshot 17.5
kyosho scr-sp/sanwa94770/hobbwing 90a/atomik 13.5
futaba 4pl
84 GT 5.0 is offline   Reply With Quote
Old 02-19-2011, 02:33 AM   #11
Tech Master
 
ScottKelly911's Avatar
 
Join Date: Jun 2010
Location: Los Angeles
Posts: 1,728
Trader Rating: 9 (100%+)
Default

I have a Slash 4x4 with a MMM 2650 on 4s and it's ridiculously fast. My friend had the same but had the 2200 and I walked him like he was stuck in mud. For shits and giggles I threw a 6s in there and it was STUPID FAST! I believe that's what you're looking for lol Oh I also had it geared 25T pinion and a 50T spur, yeah you can imagine how ridiculous it was. Many people will tell you not to run a 6s on the 2650. It can handle it however not for sustained periods. If you call, even Castle will tell you it can handle it for short bursts like speed runs. But doing them over and over and running a whole battery pack through like that might kill it. But for short High Speed runs, it can handle it no problem, but your tires wont!
__________________
Associated B6D w/laydown, Hobbywing Just Stock/Schuur Speed 17.5 Race Car
Associated SC5m 2wd Shortcourse truck Tekin RS Pro/Reedy Sonic 8.5 Race Truck
Tekno SCT410, Tekin Pro4hd 3000kv on 3s Mostly for fun
Associated B5M, Hobbywing Just Stock/Reedy 8.5 Mod Just for fun
Home track OCRC & Home away from home SCVRC
ScottKelly911 is offline   Reply With Quote
Old 02-19-2011, 09:21 AM   #12
Tech Regular
 
Dougoilman661's Avatar
 
Join Date: Oct 2010
Location: Bay Area, CA
Posts: 339
Trader Rating: 13 (100%+)
Default

I also have a spare Novak 4.5 550. What type of speed would that give me on 2s?
__________________
Be the change you want to see in the world
Dougoilman661 is offline   Reply With Quote
Old 02-19-2011, 12:50 PM   #13
Tech Master
 
84 GT 5.0's Avatar
 
Join Date: Apr 2010
Location: Fresno California
Posts: 1,303
Trader Rating: 26 (96%+)
Default

that 4.5 would be faster than what you have and run cooler, you just need a controller for it.
__________________
JQ THE Car YE teknoV4/xerun150/t81400/savox1256tg
Tamiya TRF-416/s6040/vipervtx10R/ killshot 17.5
kyosho scr-sp/sanwa94770/hobbwing 90a/atomik 13.5
futaba 4pl
84 GT 5.0 is offline   Reply With Quote
Old 02-19-2011, 01:45 PM   #14
Tech Initiate
 
Join Date: May 2010
Posts: 32
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by Dougoilman661 View Post
I also have a spare Novak 4.5 550. What type of speed would that give me on 2s?
Teach a man to fish:
http://scriptasylum.com/rc_speed/top_speed.html
silentbob343 is offline   Reply With Quote
Old 02-19-2011, 05:00 PM   #15
Tech Elite
 
bigben1165's Avatar
 
Join Date: Aug 2010
Location: grand rapids, michigan
Posts: 3,068
Trader Rating: 9 (100%+)
Send a message via Yahoo to bigben1165
Default

rc caR ACTION did a project car that went 100mph. i can send you the pdf of the article if you send me your email address.
__________________
BigBen
HPI TEKNO VORZA, 2200kv, 6s maxamp, MMM, 4PKS, huge balls
bigben1165 is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
B-Fast RC Performance Diff Parts for LOSI AND ASSOCIATED scott54 Electric Off-Road 1710 08-26-2015 04:39 PM
Stupid Fast Jato BB with Picco P7R Evo2 .21 New Era Conversion traxxasjunky R/C Items: For Sale/Trade 19 10-11-2010 06:47 PM
STUPID SLASH....Stupid fast that is! camocowboy Electric Off-Road 7 12-05-2009 12:21 PM
How fast are you !!!!!!! team_tamiya Electric On-Road 36 05-12-2004 12:07 AM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -7. It is currently 09:42 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net