R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 02-18-2007, 10:15 PM   #1
Tech Legend
 
Cain's Avatar
 
Join Date: May 2002
Location: West Fargo, North Dakota
Posts: 29,552
Trader Rating: 240 (100%+)
Default mamba max 7700 edition, too fast for 4wd buggy of 2wd truck?

Is the 7700 version of the mamba max system too fast for 4wd buggy or 2wd truck?

Is it possible to de-rev the system so its less powerful at all? Curious if the setups are all or nothing are you can tune it some.
__________________
Member - Red River Radio/Control Car Club
< Tekno EB48SL / SCT410.3 | Tekno EB410 x 2 | Yokomo YZ-2 DTM x 2 | LC Racing EMB-1 Buggies and Truggies >
Cain is offline   Reply With Quote
Old 02-18-2007, 10:23 PM   #2
wyd
Tech Legend
 
wyd's Avatar
 
Join Date: Sep 2001
Location: Castle Mamba Max Pro. Feel its power!!!!!!!!!!
Posts: 21,143
Trader Rating: 50 (100%+)
Send a message via AIM to wyd
Default

Yes you can turn it down some of just go with the new 6900 or the 5600 series motors. I would think for most race conditions the 6900 would still be almost overkill. The 5600 system is like a good 9 to 10 turn which is pretty plenty. The 6900 is like a 6 tuen brushed which is overkill.

http://www.castlecreations.com/products/cms36-5700.html
http://www.castlecreations.com/products/cms36-6900.html
__________________
Castle Creations (Since 2005) Just awesome products
Bumps & Jumps RC (Great Indoor facility for offroad and oval)
ST Racing Concepts (STRC)
Custom Works (Best Oval Cars around)
wyd is offline   Reply With Quote
Old 02-18-2007, 10:54 PM   #3
Tech Regular
 
Join Date: Jan 2007
Location: Jeffersonville, IN
Posts: 259
Send a message via AIM to Brushless Corey
Default

If your wanting to detune it then why get it? Just like wyd said, just get one of the lower KV motors if your gonna race. If its just gonna be something your gonna rip up and down the street with get the 5700 and put a 3s lipo in it. If your not wanting to go lipo, then get the 7700.

My brother has the 7700 with 2s lipo and it will pull the wheels anytime you want it too. Its a handfull keeping it straight on the track.

Now that I think of it, you should just buy the 5700. That way it'll be more than enough on the dirt with some 6 cells batteries, but if you wanna get crazy with it you can put a 3s lipo in it. You can't really run a 3s lipo on a 7700.
Brushless Corey is offline   Reply With Quote
Old 02-18-2007, 10:56 PM   #4
Tech Elite
 
glassdoctor's Avatar
 
Join Date: Aug 2006
Posts: 2,250
Trader Rating: 4 (100%+)
Default

4wd buggy can't have too much power

I run a 7700 in a XX4... and a 5700 in a T4.

Both are stupid fast on the track... as much power as I can imagine ever needing for racing.

As for taming the system, there are some software tweaks like punch control and motor timing, but there isn't any kind of rev limiter. CC says they may include that in a future software update though... but for now you can't truely "turn down" the system very much without limiting the EPA which is not a good idea.

I found in my B4... a good milder setup that is still very fast, is to run the 4600 motor and gear it to the moon. It takes some of the snap out of it.. and revs out pretty high. ANd the heat is not a problem at all. Oh and it still can pull the front up on a high bite track, geared 25/81. So I guess it's not exaclty "soft".
glassdoctor is offline   Reply With Quote
Old 02-18-2007, 10:58 PM   #5
Tech Elite
 
glassdoctor's Avatar
 
Join Date: Aug 2006
Posts: 2,250
Trader Rating: 4 (100%+)
Default

In general I would say the 6900 for 4wd, 5700, for truck, and 4600/5700 for buggy depending on how sick you want it.

I haven't run the 6900 but I bet it's really good for 4wd.
glassdoctor is offline   Reply With Quote
Old 02-18-2007, 11:01 PM   #6
Tech Legend
 
Cain's Avatar
 
Join Date: May 2002
Location: West Fargo, North Dakota
Posts: 29,552
Trader Rating: 240 (100%+)
Default

reason I ask about detuning it is two part:

1. to be able to better tune it to the track. I may want most of the power but not what the slower motor gives.

2. Tower's price on the 7700 version is significantly cheaper than the other two.
__________________
Member - Red River Radio/Control Car Club
< Tekno EB48SL / SCT410.3 | Tekno EB410 x 2 | Yokomo YZ-2 DTM x 2 | LC Racing EMB-1 Buggies and Truggies >
Cain is offline   Reply With Quote
Old 02-18-2007, 11:30 PM   #7
Tech Elite
 
glassdoctor's Avatar
 
Join Date: Aug 2006
Posts: 2,250
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by Cain
2. Tower's price on the 7700 version is significantly cheaper than the other two.
Weird.... that's a pretty good deal...

I like the 7700 in mine. I also run a 2s lipo pack in it... I haven't run anything else it it. So I guess I can't say I actually know what it's like with 4200s etc.

The way I look at it almost everyone running 4wd straps in the fastest motors they have whether brushed or BL. You could always pick up another motor or run a brushed if the track requires.

The reason I would look at the 6900 first is just that I think it will still be stupid fast and it whoudl run a little cooler. The 7700 won't overheat or anythign but it cna get hot. I do run a XX4 too so that's not helping.

My old SS5800 used to run 220* in my XX4 hee hee
glassdoctor is offline   Reply With Quote
Old 02-19-2007, 09:00 AM   #8
Tech Legend
 
Cain's Avatar
 
Join Date: May 2002
Location: West Fargo, North Dakota
Posts: 29,552
Trader Rating: 240 (100%+)
Default

Thanks for the info. I will probably still do traditional packs for now.
__________________
Member - Red River Radio/Control Car Club
< Tekno EB48SL / SCT410.3 | Tekno EB410 x 2 | Yokomo YZ-2 DTM x 2 | LC Racing EMB-1 Buggies and Truggies >
Cain is offline   Reply With Quote
Old 02-19-2007, 09:07 AM   #9
Tech Elite
 
CRASH's Avatar
 
Join Date: Jan 2002
Posts: 2,715
Trader Rating: 26 (100%+)
Default

If you are going to do the 6900 or 7700 and run nimh batteries be sure to get some that are top of the line. Ex: IB4200s 420+ run time 1.230V+ and IR 1.3-1.4

Cheaper batteries will just not work with those 2 systems and barely work with the 5700 and 4600.

As far as detuning the motor, yes you can cut the timing back, decrease start power and punch as well as decrease your throttle curve.

Hope this helps,

Later,
CRASH is offline   Reply With Quote
Old 02-19-2007, 10:05 AM   #10
Tech Legend
 
Cain's Avatar
 
Join Date: May 2002
Location: West Fargo, North Dakota
Posts: 29,552
Trader Rating: 240 (100%+)
Default

What is the problem with running NIMH batteries that you are seeing?
__________________
Member - Red River Radio/Control Car Club
< Tekno EB48SL / SCT410.3 | Tekno EB410 x 2 | Yokomo YZ-2 DTM x 2 | LC Racing EMB-1 Buggies and Truggies >
Cain is offline   Reply With Quote
Old 02-19-2007, 10:11 AM   #11
Tech Elite
 
CRASH's Avatar
 
Join Date: Jan 2002
Posts: 2,715
Trader Rating: 26 (100%+)
Default

Not enough voltage/power. The Mamba Max brusless motors draw and enormous amount of power and without batteries up tp the task the system will not perform the way it should and it will kill the batteries at a very quick rate.

Later,
CRASH is offline   Reply With Quote
Old 02-19-2007, 10:17 AM   #12
Tech Legend
 
Cain's Avatar
 
Join Date: May 2002
Location: West Fargo, North Dakota
Posts: 29,552
Trader Rating: 240 (100%+)
Default

Thats very interesting considering the fact that seems brushless is supposed to give more runtime? Hmm. have to think about that some as I was planning on going with some IB3600 - 3800s to start with.
__________________
Member - Red River Radio/Control Car Club
< Tekno EB48SL / SCT410.3 | Tekno EB410 x 2 | Yokomo YZ-2 DTM x 2 | LC Racing EMB-1 Buggies and Truggies >
Cain is offline   Reply With Quote
Old 02-19-2007, 10:37 AM   #13
Tech Elite
 
CRASH's Avatar
 
Join Date: Jan 2002
Posts: 2,715
Trader Rating: 26 (100%+)
Default

Longer run times as long as your batteries are up to the task. The 6900 and 7700 are power hungry.

Later,

Last edited by CRASH; 02-19-2007 at 03:14 PM.
CRASH is offline   Reply With Quote
Old 02-19-2007, 11:17 AM   #14
Tech Elite
 
glassdoctor's Avatar
 
Join Date: Aug 2006
Posts: 2,250
Trader Rating: 4 (100%+)
Default

Seems like an oxymoron huh? I believe there is more runtime/efficiency with brushless... but relative to the power you get.

A 7700 may not have more runtime than a 12x2 for example... but it will have a lot more runtime than a brushed of similar power, like a 6x1.

Personally I think the CC guys overstress the battery thing due to some guys trying to run junk packs. Power is power... the battery doesn't know or care who made the motor.

Any pack a serious racer will be using is good enough. Guys like crash tend to not give us enough credit.
glassdoctor is offline   Reply With Quote
Old 02-19-2007, 12:23 PM   #15
Tech Apprentice
 
Join Date: Dec 2005
Location: North Carolina
Posts: 56
Default

Just from my experience, I think a good SxS IB 3800 pack will do fine.

Besides, they can handle 7t singles in world class touring cars and that's more current than you will ever see in a 1/10 offroader I'd think.
scoob is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Mamba Max 7700 dustyz R/C Items: For Sale/Trade 5 06-13-2008 08:08 AM
Mamba Max + 7700 kv (NEW) Canuck R/C Items: For Sale/Trade 1 04-02-2008 11:06 AM
Mamba Max 7700 Phroz Australia For Sale/Trade 3 08-18-2007 05:21 AM
Mamba Max 7700 kit portyansky R/C Items: For Sale/Trade 2 06-15-2007 05:33 PM
Mamba Max 7700 sambonee R/C Items: For Sale/Trade 2 05-16-2007 03:55 PM



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 07:46 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net