Go Back  R/C Tech Forums > General Forums > Electric On-Road
GTB 4.5 SINTERED MOTOR >

GTB 4.5 SINTERED MOTOR

GTB 4.5 SINTERED MOTOR

Old 08-18-2007, 11:28 PM
  #1  
Tech Adept
Thread Starter
 
16skyline's Avatar
 
Join Date: Nov 2006
Posts: 195
Default GTB 4.5 SINTERED MOTOR

I have a question, I have geared my 4.5 at a final drive of 9.5 as it said to do so at this web address

http://www.teamnovak.com/tech_info/b...r_gearing.html

But it also said that the esc or motor should not go over tempertures of 160-175F, I don't have a temp gun but when I touch the motor it is just warm I can hold my finger on there for a long time, it is no were near the 160f. Should I gear up more (our track is outdoor asphalt and has a long straight about 50 metres).
16skyline is offline  
Old 08-18-2007, 11:40 PM
  #2  
Tech Adept
iTrader: (2)
 
peter p's Avatar
 
Join Date: Jun 2006
Location: Torquay
Posts: 199
Trader Rating: 2 (100%+)
Default

I geared my 3.5 at 9.3 and it was fine
peter p is offline  
Old 08-19-2007, 06:12 AM
  #3  
Tech Lord
iTrader: (22)
 
UN4RACING's Avatar
 
Join Date: Oct 2006
Location: MODIFIED!
Posts: 13,140
Trader Rating: 22 (100%+)
Default

Originally Posted by 16skyline View Post
I have a question, I have geared my 4.5 at a final drive of 9.5 as it said to do so at this web address

http://www.teamnovak.com/tech_info/b...r_gearing.html

But it also said that the esc or motor should not go over tempertures of 160-175F, I don't have a temp gun but when I touch the motor it is just warm I can hold my finger on there for a long time, it is no were near the 160f. Should I gear up more (our track is outdoor asphalt and has a long straight about 50 metres).
Gearing it up will only make it fast in the straight. Unless your geared really low. I would say keep in mind gearing the straight can hurt you in the infield.
A rule of thumb is to gear it so that it winds up 3/4 of the way down the straight. If it gets to hot.? Gear it half way down the straight.

The rule to gearing the straight 3/4's, is because you can only drag race so far down it before you have to set up for the turn. I ran my 4.5 indoors on carpet and it never got over 120 degrees. And it was still wicked fast. I like the low temps between 120 and 140.
UN4RACING is offline  
Old 08-19-2007, 07:50 AM
  #4  
Tech Champion
iTrader: (14)
 
skypilot's Avatar
 
Join Date: Mar 2007
Posts: 9,533
Trader Rating: 14 (100%+)
Default

gear to where the motor performs the best on YOUR track, after a few laps, check temp. if still cool, then all the better, if hotter then hell, gear down. find a nitro guy and borrow his temp gun.
skypilot is offline  
Old 08-19-2007, 12:22 PM
  #5  
Tech Master
iTrader: (6)
 
bxpitbull's Avatar
 
Join Date: Feb 2005
Location: Union City, New Jersey
Posts: 1,883
Trader Rating: 6 (100%+)
Default

If you are running a fan on the motor as well as the speedo, I have run at 9.3 for medium length straights, but that is pushing it. But, as said previously, if you can gear it and stay within the 160-175 range for about two minutes, then you should be fine for the duration of the race. Motors get to a temperature and pretty much stay within the same range. Now, if you want to be extra safe, add a tooth and that will keep in your safe range. Then....go kick ass!

Last edited by bxpitbull; 08-19-2007 at 03:42 PM.
bxpitbull is offline  
Old 08-20-2007, 03:42 AM
  #6  
Tech Adept
Thread Starter
 
16skyline's Avatar
 
Join Date: Nov 2006
Posts: 195
Default

So if I was to touch a motor that is 175f would it burn your finger?
16skyline is offline  
Old 08-20-2007, 06:55 AM
  #7  
Tech Master
iTrader: (6)
 
bxpitbull's Avatar
 
Join Date: Feb 2005
Location: Union City, New Jersey
Posts: 1,883
Trader Rating: 6 (100%+)
Default

Originally Posted by 16skyline View Post
So if I was to touch a motor that is 175f would it burn your finger?
No, it would be very uncomfortable if you left it there for more than a few seconds, but no. 175 isnt scalding...unless you have sensitive skin....how you doing?
bxpitbull is offline  
Old 08-20-2007, 09:13 AM
  #8  
The Evicerator
 
Join Date: Sep 2001
Location: Scottsdale, AZ
Posts: 4,145
Default

Most of the answers here are pretty much dead-on.

The Gearing Recommendations that we make are for medium sized tracks and your gearing may be different depending on your track size and conditions.

We like to see the ESCs and motors run under 170, but this does not mean that the motors must run at this temperature to perform at their best.

The cooler that your system runs, the better it will run!

Anytime you have any questions feel free to email charlie or me at Novak!

[email protected], [email protected], or [email protected]
Steve Weiss is offline  

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 - Do Not Sell My Personal Information

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.