R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 11-02-2007, 10:05 PM   #1
Tech Master
 
Join Date: Oct 2005
Posts: 1,181
Trader Rating: 12 (100%+)
Default 4 cell spread spectrum GTB/3.5 Velociti Combo trouble

Hey All,
Has anyone had issues with thermal shutdown on this combo in a 1/12 scale? I have seen it with a few friends systems and want to avoid it with mine.
Thanks,
Kane
Kane-o is offline   Reply With Quote
Old 11-03-2007, 02:35 AM   #2
Tech Regular
 
Join Date: Aug 2003
Location: England
Posts: 257
Default

what rollout are you running? with 4 cell & 3.5 I would have thought you should be in the 22-26mmpr range?
TraceRacing is offline   Reply With Quote
Old 11-03-2007, 08:56 AM   #3
Tech Master
 
Join Date: Oct 2005
Posts: 1,181
Trader Rating: 12 (100%+)
Default

Novak recommends 28mm and my friends have tried down to about 26mm with inconsistent results.
Kane-o is offline   Reply With Quote
Old 11-03-2007, 09:10 AM   #4
Tech Master
 
EricW's Avatar
R/C Tech Elite Subscriber
 
Join Date: Nov 2006
Location: Meriden, Ct
Posts: 1,883
Trader Rating: 1 (100%+)
Default

Are you sure it's a thermal shutdown? Are you using a Spektrum radio and reciever? Are you using the Spektrum Voltage Protector with you're reciever? Some of the guys that were running a brushless setup would have their cars turn off in the middle of a run. Once they started using the voltage protector they didn't have that problem.

This was with 1/12th and 4 cell setup.

http://www.spektrumrc.com/Products/D...ProdID=SPM1600
EricW is offline   Reply With Quote
Old 11-03-2007, 09:23 AM   #5
Tech Champion
 
AdrianM's Avatar
 
Join Date: Aug 2001
Location: Tampa, FL
Posts: 5,914
Trader Rating: 4 (100%+)
Default

You have to run a reciever pack in 1/12th mod too. Especially with Specktrum Rx's.
__________________
Adrian Martinez
What I run: Schumacher Mi5/Associated RC10R5.1/Associated RC12R5.2/Futaba/HobbyWing/Team EA Motorsports/BSR Racing
Where I run: Florida Indoor R/C Complex/Thunder Racing/Florida On Road State Series
AdrianM is offline   Reply With Quote
Old 11-03-2007, 09:25 AM   #6
Tech Fanatic
 
tdeal823's Avatar
 
Join Date: Feb 2007
Location: North West, Ohio
Posts: 951
Trader Rating: 30 (100%+)
Default

yeah you need an SPM1600 for a 4 cell mod brushless combo.

When you hit the gas it pulls to much out for the motor and leaves your receiver with insufficient voltage.
tdeal823 is offline   Reply With Quote
Old 11-03-2007, 10:40 AM   #7
Tech Master
 
Join Date: Oct 2005
Posts: 1,181
Trader Rating: 12 (100%+)
Default

No it is excessive ESC temps that are the problem. He is seeing temps in excess of 200 on botht he motor and ESC.

On another note I have never run a receiver pack in my 1/12 scale and I only run low turn (8 and 9) motors. I do run the Spektrum voltage protector though.
Kane-o is offline   Reply With Quote
Old 11-03-2007, 11:11 AM   #8
Company Representative
R/C Tech Elite Subscriber
 
Join Date: Jun 2005
Location: SoCal
Posts: 2,891
Default

Quote:
Originally Posted by Kane-o View Post
Hey All,
Has anyone had issues with thermal shutdown on this combo in a 1/12 scale? I have seen it with a few friends systems and want to avoid it with mine.
Thanks,
Kane
This may seem like a foolish question, but how many--and what kind of---cells is your friend using in his application?
NovakTwo is offline   Reply With Quote
Old 11-03-2007, 01:05 PM   #9
Tech Master
 
Join Date: Oct 2005
Posts: 1,181
Trader Rating: 12 (100%+)
Default

SMC IB4200 4 cell pack
Kane-o is offline   Reply With Quote
Old 11-03-2007, 02:06 PM   #10
Tech Master
 
Join Date: Oct 2005
Posts: 1,181
Trader Rating: 12 (100%+)
Default

I guess I just want to know if anyone has run this setup successfully in a 1/12 scale. I know the 3.5 can cause the GTB to thermal. My friend who is a sponsored Xray driver has caused this system to thermal in his touring car as well as got it to thermal within 2 minutes in his dad's 1/12 scale. Now granted he can push a car harder than most but it still shouldn't happen.
Kane-o is offline   Reply With Quote
Old 11-03-2007, 10:52 PM   #11
The Evicerator
R/C Tech Elite Subscriber
 
Join Date: Sep 2001
Location: Irvine, CA
Posts: 4,142
Default

Kane-O,

Sounds like you might have a kind of touchy thermal sensing ESC there... if you send it in with a note saying thermal issues to my attention I can get it looked it!
__________________
Steve Weiss
TEAM ASSOCIATED -- REEDY -- SANWA -- PROTOFORM -- 1UP Racing -- ActivRC -- P1 BRAND -- TEAM KINWALD -- TEAM STEVE INTERNATIONAL
Steve Weiss is offline   Reply With Quote
Old 11-04-2007, 01:13 AM   #12
Tech Master
 
Join Date: Oct 2005
Posts: 1,181
Trader Rating: 12 (100%+)
Default

So Steve what ypu are saying is these isues should not be happening despite the application it is being used in?
Thanks,
Kane
Kane-o is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS/FT: NIB GTB Spread Spectrum K_King R/C Items: For Sale/Trade 5 09-02-2008 12:34 AM
Novak 4 cell GTB 2.4ghz spread spectrum ldp787 R/C Items: For Sale/Trade 3 03-03-2008 07:11 PM
GTB Spread Spectrum 2.4 ghz (not 4 cell) jrxsracer R/C Items: For Sale/Trade 8 03-02-2008 05:02 PM
Novak GTB 4-cell Spread Spectrum rraden R/C Items: For Sale/Trade 2 02-27-2008 12:12 PM
Novak GTB Spread Spectrum (Regular vs 4 cell) Zen of Speed Electric Off-Road 5 06-03-2007 02:00 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 02:05 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