R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 11-08-2010, 04:52 AM   #331
Tech Regular
 
djiewie's Avatar
 
Join Date: Aug 2010
Posts: 440
Default

I too have some questions about the lrp x12 13,5 bl moter.

With my previous tekin setup with the speedp.10,5 the x12 gets 90deg.C.
Now it seems that the x12 doesn`t like timing very much and you have the gear up to get speed and low temps. It seems with no turbo (tekin wise) with just boost is the way to go for low temps. I use the 0 deg. timing on the engine but it is advised to use the -10 timing. Gone from 90deg.C to 50deg. C just with this. Speed became better and stayed the same through the run.

What are the experience with racing regarding this aspect.

Greetz JW
djiewie is offline   Reply With Quote
Old 11-09-2010, 04:15 PM   #332
Tech Regular
 
smracer31's Avatar
 
Join Date: Nov 2004
Location: Wisconsin
Posts: 425
Trader Rating: 6 (100%+)
Send a message via AIM to smracer31
Default

quick question on the x12 maintenance, what do you guys recommend to clean the motor with, ie: which motor spray? also, whats the easiest way to remove the rear bearing off the rotor? i dont want to damage the rotor trying to remove it.
Thanks
smracer31 is offline   Reply With Quote
Old 11-14-2010, 11:02 AM   #333
Tech Master
 
Casey's Avatar
 
Join Date: Aug 2001
Location: Md
Posts: 1,576
Trader Rating: 5 (100%+)
Default

Has anyone had a motor act up after changing the timing block....my motor ran fine in 12th scale 13.5, got up to 140 f .. but felt soft at the end... changed from 3 dot to 4 dot at the suggestion of a fellow racer, once I put it back to gether, the motor would not spin up to speed ? could the small round housing that the timing block go on be bad now ?
Casey is offline   Reply With Quote
Old 11-14-2010, 11:21 AM   #334
Tech Addict
 
mattleegee's Avatar
 
Join Date: Sep 2010
Location: Kent, WA
Posts: 646
Trader Rating: 9 (100%+)
Default

Do the hop ups for these motors really work?
Im talking about the
Lightweight front housing and the aluminum rear cover for cooling?
ceramic bearings?
__________________
AE ft b4.1 Ballistic 13.5 + SXX comp v2 (3-5-3-8) 1258tg
AE ft b4.1 Ballistic 17.5 + SXX comp v2 (3-7-0-4) 1257tg
BRCR
I pick things up and put them down
mattleegee is offline   Reply With Quote
Old 11-14-2010, 11:39 AM   #335
Tech Master
 
Buckaroo's Avatar
 
Join Date: Oct 2010
Location: Norfolk, VA
Posts: 1,503
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by mattleegee View Post
Do the hop ups for these motors really work?
Im talking about the
Lightweight front housing and the aluminum rear cover for cooling?
ceramic bearings?
Short answer, Yes.

Long answer, depends.

How close to the performance envelope do you run your motor consistently?

The ceramic bearings will run smoother, longer. The more you abuse/neglect your motor, the more that will pay off. They are NOT, however, install and forgets like most people believe, they just have an increadibly long life under the same circumstances when compared to standard bearings.

A reduction in weight CAN help the overall car balance with the front housing. You have to decide how much time and $ a few grams is worth to YOU.

As for the cooling endbell, it has more surface area, but that will only make a significant difference if you have some air moving over it.

Like any assembly, it's a system, not just a collection of parts, and while the overall benefit of one or more optional parts might be small, taken as a whole with all of the other small changes to save weight, redistribute weight in a more constructive manner, or effect greater cooling, it can add up in the long run.

Most folks, however, are not running their equipment nearly as hard as they think they are or have sufficient tools to properly measure (much less set up) weight distribution (although all of the above is becoming more common). Never mind the collection of crazy cooling mods, some effective, most junk.

In the long run, if you THINK it's helping you, maybe it is.

If you're in the top 10% of the drivers at your track (based on lap times and consistency), then you're probably already maximizing your set up and the few grams or degrees these parts will bring you will help you to cover all of the bases and ensure that when you get beat by 1/10th of a second in the A main that your equipment wasn't what held you back.

For the rest of us more normal sportsman class users, it opens the envelope somewhat of reliability and provides an extra margin in the fudge factor of weight distribution and maintenance requirements. Mostly, though, it just makes YOU faster because your wallet is lighter.
__________________
Tom Keith

Tekin & Sweep, thanks for all that you do for you know who!

Associated/T.O.P./Mugen/Fantom/Spektrum/Savox
Buckaroo is offline   Reply With Quote
Old 11-14-2010, 11:43 AM   #336
Tech Addict
 
mattleegee's Avatar
 
Join Date: Sep 2010
Location: Kent, WA
Posts: 646
Trader Rating: 9 (100%+)
Default

Thank you
__________________
AE ft b4.1 Ballistic 13.5 + SXX comp v2 (3-5-3-8) 1258tg
AE ft b4.1 Ballistic 17.5 + SXX comp v2 (3-7-0-4) 1257tg
BRCR
I pick things up and put them down
mattleegee is offline   Reply With Quote
Old 11-14-2010, 12:42 PM   #337
Tech Regular
 
Join Date: May 2009
Posts: 256
Default

how to gear a X12 17.5?

SP 2.1 Prostock ESC tamiya 416X/ Xray T3"11 rubber tires..
and stright is about 20-22 meters..

tight and technical layout?
Zooberg is offline   Reply With Quote
Old 11-16-2010, 03:37 AM   #338
Tech Regular
 
Join Date: May 2009
Posts: 256
Default

Anyone?



Quote:
Originally Posted by Zooberg View Post
how to gear a X12 17.5?

SP 2.1 Prostock ESC tamiya 416X/ Xray T3"11 rubber tires..
and stright is about 20-22 meters..

tight and technical layout?
Zooberg is offline   Reply With Quote
Old 11-16-2010, 10:09 PM   #339
Tech Fanatic
 
rc pete's Avatar
 
Join Date: Jul 2003
Location: Airdire, AB, Canada
Posts: 775
Trader Rating: 6 (100%+)
Default

Quote:
Originally Posted by Zooberg View Post
how to gear a X12 17.5?

SP 2.1 Prostock ESC tamiya 416X/ Xray T3"11 rubber tires..
and stright is about 20-22 meters..

tight and technical layout?
I run 13.5 Super-stock boosted so I don't have first hand experience with it, but I took a poll of some of the quick Stock racers running the x12 17.5 non-boosted at our last big race here last weekend. It was a carpet track, with a longer straight (100 ft) and a tight infield.
The were all over the map:
- 3.8 FDR with 4 dot timing
- 4.2 FDR with 2 dot timing
- 4.5 FDR with 1 or 2 dot timing (forget which one)
They all seemed pretty close, although the 4.2 guy was losing a couple of feet on the straight to the other two, which I thought was odd since he was right in the middle of their setups.
__________________
Team Associated - Reedy - Pro-Line - RC Depot - OS Engines - 110% Racing - LD Graphics
rc pete is offline   Reply With Quote
Old 11-18-2010, 02:30 PM   #340
Tech Addict
 
Join Date: Oct 2008
Location: Spokane, WA
Posts: 587
Trader Rating: 46 (100%+)
Default

New user of a 13.5 X12. When someone says they are running the 4dot insert, do they mean with the 4 dots facing inside the motor?

Anyone have a gearing/timing suggestion for 1/12th scale on a very small 30'X40' track no boost/no timing allowed on speedo?
biz77 is offline   Reply With Quote
Old 11-18-2010, 03:29 PM   #341
Tech Master
 
PitNamedGordie's Avatar
 
Join Date: Nov 2003
Location: Highwood, IL
Posts: 1,789
Trader Rating: 8 (100%+)
Send a message via AIM to PitNamedGordie Send a message via Yahoo to PitNamedGordie
Default

Quote:
Originally Posted by biz77 View Post
New user of a 13.5 X12. When someone says they are running the 4dot insert, do they mean with the 4 dots facing inside the motor?

Anyone have a gearing/timing suggestion for 1/12th scale on a very small 30'X40' track no boost/no timing allowed on speedo?
You should be able to see the 4 dots when looking at the motor. The flip side of the 4 dot insert is actually -. Which advances the timing....not what you are looking for.
__________________
☆ The Track @ Harbor Hobbies ☆ www.harbor-hobby.net ☆
PitNamedGordie is offline   Reply With Quote
Old 11-18-2010, 03:40 PM   #342
Tech Addict
 
Join Date: Oct 2008
Location: Spokane, WA
Posts: 587
Trader Rating: 46 (100%+)
Default

I haven't touched the motor and the manual mentions it comes with the 2dot insert installed. When looking at the end of the motor, I can see the four dots visible.
biz77 is offline   Reply With Quote
Old 11-18-2010, 05:24 PM   #343
AE-Reedy
 
Join Date: May 2008
Posts: 780
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by biz77 View Post
I haven't touched the motor and the manual mentions it comes with the 2dot insert installed. When looking at the end of the motor, I can see the four dots visible.
When the motors were originally released the boosted SCs had not hit the market. So yes 2 dot was the spec. After the timing increase came about LRP changed production to 4 dot in order to protect the motors from excessive timing. Obviously the manual has not been updated.

For the insert to be in the correct position you need to be able to see the markings from out side of the motor.
Sean Cochran is offline   Reply With Quote
Old 11-18-2010, 06:57 PM   #344
Tech Master
 
LonnyJ1950's Avatar
 
Join Date: Aug 2009
Location: Tucson, AZ. USA
Posts: 1,204
Default

Quote:
Originally Posted by biz77 View Post

Anyone have a gearing/timing suggestion for 1/12th scale on a very small 30'X40' track no boost/no timing allowed on speedo?
You should start with about a 70mm rollout. Between 38/40 to 78 depending on your tire size. To get it right for your layout you need to experiment a little and watch the temps.
__________________
Lonny
LonnyJ1950 is offline   Reply With Quote
Old 11-18-2010, 08:09 PM   #345
Tech Champion
 
JayBee's Avatar
 
Join Date: Mar 2004
Location: 12TH-MAN COUNTRY
Posts: 6,813
Trader Rating: 31 (100%+)
Default

Don't know if this has been covered but can anyone run down what the ACTUAL timing is when it comes to the 1-2-3-4 dot inserts?
What insert are you guys currently running in your 12th-scales?
__________________
R C 3 G R A F I X _ F U S I O N . G R A P H I X _ S E A T T L E - R/C - R A C E R S _ E M E R A L D C I T Y R C . C O M

A E - 12R5.2 _ S M - REV8 PRO

Last edited by JayBee; 11-18-2010 at 09:04 PM. Reason: added question
JayBee is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
‘FWR Racing Season’ FWR Northwest Racers 11302 08-23-2015 07:38 PM
LRP VECTOR 8 1/8 SCALE SYSTEM B.A. Racer Electric Off-Road 25 09-27-2010 10:12 PM
Hacker Brushless Motors 4.5, 6.5, 7.5, 17.5, 10.5, Tekin 10.5 hemi4me R/C Items: For Sale/Trade 15 06-22-2009 08:43 PM
Futaba Servos (BLS451, S9351, S9451) and Hacker, Novak and Tekin Motors hemi4me R/C Items: For Sale/Trade 10 06-13-2009 05:49 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 02:34 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