R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 08-03-2007, 03:27 PM   #46
Tech Addict
 
Born2Run's Avatar
 
Join Date: Jul 2007
Location: Europe
Posts: 737
Default

bxpitbull im running an XRAY T1KF05 with a MM7700 or an Nosram matrix evolution 2007 and a REEDY NEO 4star.FDR 8.21 for the 4star & 7.51 for the MM7700 both on lipo.The other guys are running on 5 cells NiMh with LPR 3.5 and FDR around 6.5.Im not so fast as the guys with the 3.5 but im fast enough with this setup especialy with the 4star REEDY.I already use on both motors the 3racing headsink without fan and my motor temps after 5 min run is about 170-175 with ambient temperatures from 97-100.So my problem is with my lipos not with the motor temps.I wish i could have 20 mins runtime with this setup.I need a couple of new lipos.Im not going back to NimH.Never again :-).
__________________
Whatever
Born2Run is offline   Reply With Quote
Old 08-03-2007, 03:35 PM   #47
Tech Lord
 
UN4RACING's Avatar
 
Join Date: Oct 2006
Location: MODIFIED!
Posts: 13,140
Trader Rating: 22 (100%+)
Default

Quote:
Originally Posted by bxpitbull View Post
Very true. I am trying to trade my truggy for a GTB and/or a 5800 system. Dudes are nibbling, but no one has taken the bait. Once I get a bite, its on. I know I will have some serious fun and mega run times in the milder winds.
CHOMP.
Is it in the for sale and trade.?
UN4RACING is offline   Reply With Quote
Old 08-03-2007, 03:52 PM   #48
Tech Master
 
bxpitbull's Avatar
 
Join Date: Feb 2005
Location: Union City, New Jersey
Posts: 1,883
Trader Rating: 6 (100%+)
Default

Trust me, at lower voltages, sensorless are not nowhere<---BAD ENGLISH NEAR as efficient as sensored. It is just taking all of the power you can throw at it...and the battery is giving all that its got. With sensored, the motor will take what it needs in moderation, making GOOD USE of the voltage ergo...better run times. I cant put it any plainer than that.
__________________
R40-Pondering a new Red Dot
Hara Pro4-GTB/3.5/Max Amps-yea.
Pondering moving on to Xray-have to go with a winner. If you cant beat em, join em!

I gear to run and win, not to THERMAL!
bxpitbull is offline   Reply With Quote
Old 08-03-2007, 03:54 PM   #49
Tech Master
 
bxpitbull's Avatar
 
Join Date: Feb 2005
Location: Union City, New Jersey
Posts: 1,883
Trader Rating: 6 (100%+)
Default

Quote:
Originally Posted by UN4RACING View Post
CHOMP.
Is it in the for sale and trade.?
yessireebob
__________________
R40-Pondering a new Red Dot
Hara Pro4-GTB/3.5/Max Amps-yea.
Pondering moving on to Xray-have to go with a winner. If you cant beat em, join em!

I gear to run and win, not to THERMAL!
bxpitbull is offline   Reply With Quote
Old 08-03-2007, 05:48 PM   #50
Tech Fanatic
 
kuzo's Avatar
 
Join Date: Jul 2005
Location: Connecticut
Posts: 948
Trader Rating: 11 (100%+)
Send a message via MSN to kuzo
Default

Quote:
Originally Posted by UN4RACING View Post
And keep a fire extinguisher handy.
Mines better than yours.

Like you say, the difference is like a 50,000 mile tire vs. a 25,000 mile tire.
No one is going to deliberately blow a pack. Yet its going to happen.
You get what you pay for. When it blows it wont be because its cheap.!

I try to only comment on what I've experienced. The 6000's are a fine battery and I have not had any issues. They are just as good as the Orions as far as performance. The difference is that Orion has taken on the roll of educating any and all who run lipo. Most fear the liability and transparency of there products. Which may some day bite them in the butt. And my self.? As new as the market is I wouldn't want any one to know where the deals are either.

My hats off to Orion and even those other companies like Max Amps that are trying to open the market with lower cost and reliability.
As long as people run around saying cheap is bad and on and on, they are causing just as much resistance as the sub-c suppliers. Its the same as saying theres resistance from with in. I cant believe all the lipo users that are dogging the cheap ones saying its them that are causing the resistance. Let lipo use grow by buying what you can afford at let it all fall into place. If a manufacturer is bad he will fade out just like any other.
I know for fact there are some cheapos out there, and they are ripping up the track just the same as any high dollar ones.
Kinda like a non matched stick pack for 25.00.
I'm starting to agree with that stance. Although I personally feel that lipo would gain acceptance faster if companies started following or improving on Orion's standard. I will not recommend anything less than hardcased high quality packs or run them but I won't speak against them. I just hope the trend will be towards more safety features and cell source disclosure.

Like I've always said, one problem wipes out a lot of gained good will and I hope it continues to be quiet on the fire front.
kuzo is offline   Reply With Quote
Old 08-03-2007, 07:13 PM   #51
Tech Master
 
sportpak's Avatar
 
Join Date: Oct 2006
Location: Ft Wayne, IN
Posts: 1,314
Trader Rating: 26 (100%+)
Default

Quote:
Originally Posted by kuzo View Post

Like I've always said, one problem wipes out a lot of gained good will and I hope it continues to be quiet on the fire front.
I agree with that statement. The best thing we can do is quiety and confidently lead by example.
__________________
-Tamiya TA05-R - Tamiya M05 - Summit Raceway Ft. Wayne, IN

www.summitrcraceway.com
sportpak is offline   Reply With Quote
Old 08-07-2007, 12:02 PM   #52
Tech Adept
 
Hick's Avatar
 
Join Date: Jun 2005
Location: Purgatory, AZ
Posts: 132
Default

Earlier this year I had the opportunity to observe the Pan Car Shoot Out in Phoenix, AZ.

Several of the "go fasters" using "hard cased" Lipo's which were "Shoo Gooed" in place and in addition some had them taped in too! There were some pretty violent wrecks, and the batteries stayed in place.

I have run the soft MaxAmp Lipo's for a little over 3 years in a TC3 (stock chassis), B3, CW Intimadator, CW Sprinter, Pan Car and a Kranzell. Though mostly run on DO, the crashes are no less severe. In practice the Intimadator took a Left Side T-Bone from a Gas Truck. Anyway, the batteries have survived these mishaps and been thrown from the cars (less the TC3 and B3). No problems. My original LiPo's finally gave up the ghost recently, when I hooked up a strings of discharge bulbs to them with no cut off. They just bulged.

The other thing that I have noticed in pictures and at the track. People have been putting weights on top of the batteries or somewhere on the car???

Something is going to happen to any car and any battery when it is placed on the track the only thing we can do is take steps to minimized damage. Though not an answer - but - it wouldn't be to hard to make a hard case out of folded plastic, light guage aluminum or maybe SS.
Hick is offline   Reply With Quote
Old 08-07-2007, 12:35 PM   #53
Tech Master
 
padailey's Avatar
 
Join Date: Nov 2005
Location: Council Bluffs, IA
Posts: 1,603
Trader Rating: 11 (100%+)
Default

Quote:
Originally Posted by Born2Run View Post
bxpitbull im running an XRAY T1KF05 with a MM7700 or an Nosram matrix evolution 2007 and a REEDY NEO 4star.FDR 8.21 for the 4star & 7.51 for the MM7700 both on lipo.The other guys are running on 5 cells NiMh with LPR 3.5 and FDR around 6.5.Im not so fast as the guys with the 3.5 but im fast enough with this setup especialy with the 4star REEDY.I already use on both motors the 3racing headsink without fan and my motor temps after 5 min run is about 170-175 with ambient temperatures from 97-100.So my problem is with my lipos not with the motor temps.I wish i could have 20 mins runtime with this setup.I need a couple of new lipos.Im not going back to NimH.Never again :-).
From the sounds of it you may have the 15C 6000 packs... of course if they are the 20C this won't make sense. Running that kind of mod motor and ESC combo you could be pulling 85+ amps. The 15C battery is only rated at 90 amp continuous so there is not much room there for error. My guess is there was too much continous amp draw on the battery or you overdischarged it. Overdischarging may not the case with the Mamba though if you have the lipo cutoff set on the MM. If you didn't before make sure you get lipos which will handle the amp load of your application. I have a 15C 6000 that puffed up a little on me and I can't for the life of me figure out why. I've heard several reports of this on the 6000's but have not heard much about the other batteries MaxAmps sells (I have heard no problems with the 20C). User error, poor batch of cells, coincidence... who knows why for sure why these reports are out there.
padailey is offline   Reply With Quote
Old 08-14-2007, 01:15 PM   #54
Tech Addict
 
Born2Run's Avatar
 
Join Date: Jul 2007
Location: Europe
Posts: 737
Default

Quote:
Originally Posted by padailey View Post
From the sounds of it you may have the 15C 6000 packs... of course if they are the 20C this won't make sense. Running that kind of mod motor and ESC combo you could be pulling 85+ amps. The 15C battery is only rated at 90 amp continuous so there is not much room there for error. My guess is there was too much continous amp draw on the battery or you overdischarged it. Overdischarging may not the case with the Mamba though if you have the lipo cutoff set on the MM. If you didn't before make sure you get lipos which will handle the amp load of your application. I have a 15C 6000 that puffed up a little on me and I can't for the life of me figure out why. I've heard several reports of this on the 6000's but have not heard much about the other batteries MaxAmps sells (I have heard no problems with the 20C). User error, poor batch of cells, coincidence... who knows why for sure why these reports are out there.
padailey i have the 20c packs,bought from the MaxAmps ebay store for a lower price.In my opinion the reason must be poor batch of cells but as you mentioned who knows for sure!! Anyway ,now i use a couple of Premium Power 4700 20C and so far everything looks OK.Less capacity,runtimes about 12-14 mins but full of power,in the half price of the MaxAmps and with no problems.I wish i have better luck with these packs.
__________________
Whatever
Born2Run is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
wtb 6000 maxamp 2s and charger don04 R/C Items: Wanted to Buy 8 06-24-2008 09:11 AM
2 MaxAmp 6000 mAh Lipo Batteries cpatel529 R/C Items: For Sale/Trade 4 03-27-2008 09:48 AM
Maxamp 6000mah Question chumanji Electric On-Road 8 03-10-2007 07:03 AM
Anybody use MaxAmp Li-Po's or any Battery from them??? bgotori Electric Off-Road 9 04-22-2006 09:33 AM
MaxAmp sport packs dugrant153 Rookie Zone 7 06-17-2005 01:08 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 03:23 AM.


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