R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 09-13-2012, 08:03 AM   #451
Tech Initiate
 
Join Date: Oct 2003
Posts: 39
Trader Rating: 2 (100%+)
Default

My fan is the one that is used in the Tekin RX8 esc. Is that good enough or is there a better one?
schaubro is offline   Reply With Quote
Old 09-13-2012, 08:18 AM   #452
Tech Champion
 
geeunit1014's Avatar
 
Join Date: Sep 2005
Location: The dirty burnie
Posts: 5,465
Trader Rating: 12 (100%+)
Default

Quote:
Originally Posted by schaubro View Post
My fan is the one that is used in the Tekin RX8 esc. Is that good enough or is there a better one?
Side Piece Racing Seis fan.
__________________
Mike Gee

Awesomatix USA/Pyscho Cells Racing/LRP/Sweep Racing/RSD/Middle River Hobbies/Johns Mobile Raceway/TQ Wire/Avid
geeunit1014 is offline   Reply With Quote
Old 09-18-2012, 05:56 AM   #453
Tech Elite
 
B00t13g's Avatar
R/C Tech Elite Subscriber
 
Join Date: Mar 2012
Location: Houston, TX
Posts: 2,041
Trader Rating: 9 (100%+)
Default

Is this motor like most 17.5s? Turn the timing all the way and gear to temp? If so, what should temp be after 6 minutes in rubber tire sedan?
B00t13g is offline   Reply With Quote
Old 09-18-2012, 06:12 AM   #454
Tech Master
 
Chaz955i's Avatar
 
Join Date: May 2009
Location: NE Ohio
Posts: 1,012
Trader Rating: 5 (100%+)
Default

Quote:
Originally Posted by B00t13g View Post
Is this motor like most 17.5s? Turn the timing all the way and gear to temp? If so, what should temp be after 6 minutes in rubber tire sedan?
Good question. I've had little luck with my Sonic. Very smooth but running timing the temps climb very fast 180+ and that is running a 4.0 FDR in blinky. For comparison my Duo 1 running in the middle timing position normally comes off around 157 and is considerably stronger all the way through. Other guys at the track are pulling a taller gear with the Sonic with more timing and coming off cooler so not sure if something is wrong with mine or I'm just approaching it completely wrong. It sure is smooth but is not near as fast as my old Duo.
__________________
At The Gate Bizzos
Chaz955i is offline   Reply With Quote
Old 09-18-2012, 09:17 AM   #455
Tech Elite
 
B00t13g's Avatar
R/C Tech Elite Subscriber
 
Join Date: Mar 2012
Location: Houston, TX
Posts: 2,041
Trader Rating: 9 (100%+)
Default

Quote:
Originally Posted by Chaz955i View Post
Good question. I've had little luck with my Sonic. Very smooth but running timing the temps climb very fast 180+ and that is running a 4.0 FDR in blinky. For comparison my Duo 1 running in the middle timing position normally comes off around 157 and is considerably stronger all the way through. Other guys at the track are pulling a taller gear with the Sonic with more timing and coming off cooler so not sure if something is wrong with mine or I'm just approaching it completely wrong. It sure is smooth but is not near as fast as my old Duo.
I have the same issue with my motors in general. I flat out get motors hotter than most.
B00t13g is offline   Reply With Quote
Old 09-18-2012, 10:52 AM   #456
Regional Moderator
 
CarbonJoe's Avatar
 
Join Date: Jul 2006
Posts: 2,660
Default

Quote:
Originally Posted by Chaz955i View Post
Good question. I've had little luck with my Sonic. Very smooth but running timing the temps climb very fast 180+ and that is running a 4.0 FDR in blinky. For comparison my Duo 1 running in the middle timing position normally comes off around 157 and is considerably stronger all the way through. Other guys at the track are pulling a taller gear with the Sonic with more timing and coming off cooler so not sure if something is wrong with mine or I'm just approaching it completely wrong. It sure is smooth but is not near as fast as my old Duo.
On the same track as Chaz955i, with my Sonic 17.5, I've been running around 145 - 165 degrees with an FDR of 3.8, depending on layout. I used to run with the timing advanced all the way, but backed off a bit it runs cooler with no loss of speed. I do run a fan blowing directly on the motor.
__________________
*** The Gate - Celebrating 7 years at the same location ***
The difference between genius and stupidity is that genius has its limits. - Albert Einstein
Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car
CarbonJoe is offline   Reply With Quote
Old 09-18-2012, 10:55 AM   #457
Tech Elite
 
B00t13g's Avatar
R/C Tech Elite Subscriber
 
Join Date: Mar 2012
Location: Houston, TX
Posts: 2,041
Trader Rating: 9 (100%+)
Default

Quote:
Originally Posted by CarbonJoe View Post
On the same track as Chaz955i, with my Sonic 17.5, I've been running around 145 - 165 degrees with an FDR of 3.8, depending on layout. I used to run with the timing advanced all the way, but backed off a bit it runs cooler with no loss of speed. I do run a fan blowing directly on the motor.
What timing are you at? I think im going to start at a 4.0
B00t13g is offline   Reply With Quote
Old 09-18-2012, 01:05 PM   #458
AE-Reedy
 
Join Date: May 2008
Posts: 773
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by B00t13g View Post
What timing are you at? I think im going to start at a 4.0
On 17.5t motors I would start with the motor timing at 40. Most likely you can run more. If you max timing immeadiately you make the gear window very narrow. I prefer to start with less timing find what gear works for you then carefully start adding timing. Keep in mind as you increase timing you will have to gear down, smaller pinion.
Motor should always stay below 200. Optimum temp range seems to be 170-175. Also I think you must run a fan on the motor.
Sean Cochran is offline   Reply With Quote
Old 09-18-2012, 01:19 PM   #459
Tech Lord
 
wingracer's Avatar
 
Join Date: Nov 2007
Posts: 12,761
Trader Rating: 23 (100%+)
Default

I find anything over 38 is no faster, just runs hotter and falls off more. A little less timing with a little more gear is better. This is on a 13.5 though so maybe 17.5s are different.
__________________
Sean. Certified speed crazed mowron.
Team Shepherd USA
www.ashfordhobby.com
wingracer is offline   Reply With Quote
Old 09-18-2012, 03:55 PM   #460
Tech Master
 
Chaz955i's Avatar
 
Join Date: May 2009
Location: NE Ohio
Posts: 1,012
Trader Rating: 5 (100%+)
Default

Quote:
Originally Posted by CarbonJoe View Post
On the same track as Chaz955i, with my Sonic 17.5, I've been running around 145 - 165 degrees with an FDR of 3.8, depending on layout. I used to run with the timing advanced all the way, but backed off a bit it runs cooler with no loss of speed. I do run a fan blowing directly on the motor.
No doubt Joe. I thought it could be the result of binding somewhere in the drivetrain but the other motors run cool with equivalent FDR. Weird. Your car is certainly not hurting for motor either. Makes me think the one I have is just on the weak side. When I ran Seaball's car it was a rocket, which is one of the reasons I went with the Sonic. The 13.5 I'm running in WGT seems to be much closer performing to the competition, at least at the local level.
__________________
At The Gate Bizzos
Chaz955i is offline   Reply With Quote
Old 09-18-2012, 04:44 PM   #461
Tech Master
 
Mr RCTech's Avatar
 
Join Date: Dec 2005
Posts: 1,291
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by Sean Cochran View Post
On 17.5t motors I would start with the motor timing at 40. Most likely you can run more. If you max timing immeadiately you make the gear window very narrow. I prefer to start with less timing find what gear works for you then carefully start adding timing. Keep in mind as you increase timing you will have to gear down, smaller pinion.
Motor should always stay below 200. Optimum temp range seems to be 170-175. Also I think you must run a fan on the motor.
+1
That's exactly what I do at the track.
I always run around 160-165 F on the motor.
Usually drop 2-3 teeth on gearing then add more timing.
Also, run zero degrees on motor timing.
Mr RCTech is offline   Reply With Quote
Old 09-18-2012, 04:48 PM   #462
Regional Moderator
 
CarbonJoe's Avatar
 
Join Date: Jul 2006
Posts: 2,660
Default

Quote:
Originally Posted by Mr RCTech View Post
Also, run zero degrees on motor timing.
Not an option in blinky.
__________________
*** The Gate - Celebrating 7 years at the same location ***
The difference between genius and stupidity is that genius has its limits. - Albert Einstein
Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car
CarbonJoe is offline   Reply With Quote
Old 09-18-2012, 09:15 PM   #463
Tech Elite
 
B00t13g's Avatar
R/C Tech Elite Subscriber
 
Join Date: Mar 2012
Location: Houston, TX
Posts: 2,041
Trader Rating: 9 (100%+)
Default

Unfortunately my gearing window is even smaller than normal as the tallest I can go is 3.9 as far as I know.
B00t13g is offline   Reply With Quote
Old 09-18-2012, 11:22 PM   #464
Tech Elite
 
B00t13g's Avatar
R/C Tech Elite Subscriber
 
Join Date: Mar 2012
Location: Houston, TX
Posts: 2,041
Trader Rating: 9 (100%+)
Default

How do the timing marks work on the reedy(how many degrees is each tick), and what is base timing at the middle or 0 position? Thank you!
B00t13g is offline   Reply With Quote
Old 09-18-2012, 11:29 PM   #465
Tech Adept
 
Join Date: Apr 2012
Posts: 159
Trader Rating: 2 (100%+)
Default

Not sure if it's been discussed before but does anyone have any experience with track debris getting into the motor via those cooling holes?

That's my one big concern about getting a vented can motor.
jjjheimer is offline   Reply With Quote
Reply



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 07:50 PM.


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