R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 09-04-2008, 08:12 PM   #8401
Tech Champion
 
snoopyrc's Avatar
 
Join Date: Oct 2006
Location: Tunnel Hill GA
Posts: 5,046
Trader Rating: 2 (100%+)
Default

TY
__________________
www.battlefieldraceway.com Racing videos at http://www.youtube.com/snoopyrc
snoopyrc is offline   Reply With Quote
Old 09-05-2008, 02:37 AM   #8402
Tech Master
 
crabboy's Avatar
 
Join Date: Jun 2004
Location: Australia
Posts: 1,999
Trader Rating: 58 (98%+)
Default

Yeah, good enough for a top 30 driver, maybe YOU should try it the other way, you might be surprised.



Quote:
Originally Posted by Martin Hofer View Post
Well I'd suggest just try it yourself before doubting my comment ...

Chris Grainger, Masami and me do it that way so I guess it is good enough
__________________
Rhys Marshall.
crabboy is offline   Reply With Quote
Old 09-05-2008, 02:40 AM   #8403
Tech Master
 
Martin Hofer's Avatar
 
Join Date: Mar 2005
Location: Germany
Posts: 1,083
Send a message via ICQ to Martin Hofer
Default

you seriously think i haven't tried that yet? lol
__________________
Schumacher Racing
Team GM-Racing
Team Sorex
Xenon Racing
Tonisport
Martin Hofer is offline   Reply With Quote
Old 09-05-2008, 04:55 AM   #8404
Tech Addict
 
Join Date: Dec 2005
Location: Belgium
Posts: 528
Trader Rating: 6 (100%+)
Default

Quote:
Originally Posted by Martin Hofer View Post
you seriously think i haven't tried that yet? lol
Have you guys tried the following yet?? (I havent read a lot of pages back so if its been said before I'm wasting your time). I learned this in 1/12th where a diff is more important than in a Touring car.

With Ceramic diff balls the problem is the the balls are too hard to grip on the diff plates. The following instructions will make you be able to use them without having to tightening your diff a lot.
Preparation:
- Take the diff apart and put a heavy cutting (Low grid polish or something like that, I use a paint cutter compound) material on the balls instead of grease.
- Put the diff back together and very slightly tighten it.
- Then start turning the diff by hand every way you want. This will sound awful while you do it and it will feel as if you are scratching the rings.
- Do this untill you feel the compound is gone, refill the diff with it and do it again. do it for 15-20 minutes or so (while watching TV,... whatever).
-After this take it apart and check the rings, you will see that you have cut a really nice groove in which the diff balls will run, this is what you want because you have more ring- material touching the diff balls.
- Clean everything very good! make sure every bit of cutting coumpound is out of the diff and lube as you would do with a normal diff. You will notice you need to put very little pressure to make the balls grip enough to drive with and the diff is silky smooth (just saw the Zohan Movie )

I've been driving Mod with the BD for 3 years now and I have 2 diffs that I interchange every 2-3 months or so, I have yet to put in my first new pair of diff rings, the grooves will stay in perfect shape.

Now, ONLY DO THIS WITH CERAMIC BALLS the cutting coumpound will do nothing to the balls! but dont try it with carbide or steel ones cause this will destroy them.
Oh yeah, I also ca- glue my diff plates to the outputs.

Anyone do this besides me I know in 1/12th there's a bunch of us doing it.
__________________
Make it idiot-proof, and someone will make a better idiot.
Quante is offline   Reply With Quote
Old 09-05-2008, 02:37 PM   #8405
Tech Regular
 
junelopez's Avatar
 
Join Date: Jun 2007
Location: Philadelphia
Posts: 274
Default Yokomo MR4TC-BD setup

Jason,

Thank you for all your help with my setup. You are the man. :0)



Quote:
Originally Posted by JasonC View Post
what are the track conditions ?
__________________
Kyosho V-One RRR WC | AE SC10
DASH HOBBIES | SJCCR |Mushroom Bowl
junelopez is offline   Reply With Quote
Old 09-06-2008, 06:28 AM   #8406
Tech Adept
 
Slideaway's Avatar
 
Join Date: Aug 2007
Location: Sinceny, France or Bangkok, Thailand
Posts: 218
Default

Ball Differential... ...long and endless story.

I used to own a BD but I do think it's the same technic for every ball differential.

I just would like to say that a differential IS DEFINITELY NOT a friction device.
RC or Full scale either. By definition, a diff's role is to allow the corner outer wheel to have an independant spining speed with the inner wheel. It MUST be free from any friction other the purpose of such device is not reached.
Freedom is the master word !
Free but not grippy nor slipery, that means the diff ring must have the minium contact with the balls and the thurst bearing is here to allow the requested pressure to avoid any slippery operation.
That's why more than 90% of RC (serious) driver do polish their diff plates to have the smoother diff as possible.

The idea to make a groove in the diff plates is (to my humble opinion) not a good idea and a terrible waste of time (even while watching TV).
About the thurst bearing plates, if they are flat, the best is to keep them flat, so polishing them.
But some diffs (I'm thinking about Robitronic Avid) have a 8x3.5x3 thrust bearing with grooved plates. These are the strongest because the genuine machining is perfect and much preciser than a "Hand breaking made"...

Ideas and discussions are still open!

Nite
Slide
__________________
Ludo
Thai Ride Tech Support.
Slideaway is offline   Reply With Quote
Old 09-06-2008, 11:12 PM   #8407
Tech Elite
 
olhipster1's Avatar
 
Join Date: Dec 2004
Location: Asgard
Posts: 3,994
Trader Rating: 98 (100%+)
Send a message via Yahoo to olhipster1
Default Hinge Pins

Hey everyone.
I'm having a bit of a problem bending hinge pins, the rear inner pins usually get bent pretty bad. Is there a tougher replacement?

other than that my Yoks are absolutely bullet proof and so darn fast...
My LCG is a bullet with a 13.5 .....
BD is getting rebuilt this week.

Thanks everyone
__________________
everything is Cause and effect
every Action has a reaction.
"I drank too much wine - I must take a p!ss"
CAUSE and EFFECT
olhipster1 is offline   Reply With Quote
Old 09-06-2008, 11:19 PM   #8408
Tech Master
 
Martin Hofer's Avatar
 
Join Date: Mar 2005
Location: Germany
Posts: 1,083
Send a message via ICQ to Martin Hofer
Default

The Yokomo pins are usually tough enough ...

if nothing bends, the weakest thing breaks ... and that usually is the rearhub or smth like that

you can put in harder hinge pins ... like cut to size springsteel or something ... but the energy of an impact has to be absorbed by something ...
__________________
Schumacher Racing
Team GM-Racing
Team Sorex
Xenon Racing
Tonisport
Martin Hofer is offline   Reply With Quote
Old 09-07-2008, 12:52 PM   #8409
Tech Addict
 
Join Date: Dec 2005
Location: Belgium
Posts: 528
Trader Rating: 6 (100%+)
Default

Quote:
Originally Posted by Slideaway View Post
Ball Differential... ...long and endless story.

I used to own a BD but I do think it's the same technic for every ball differential.

I just would like to say that a differential IS DEFINITELY NOT a friction device.
RC or Full scale either. By definition, a diff's role is to allow the corner outer wheel to have an independant spining speed with the inner wheel. It MUST be free from any friction other the purpose of such device is not reached.
Freedom is the master word !
Free but not grippy nor slipery, that means the diff ring must have the minium contact with the balls and the thurst bearing is here to allow the requested pressure to avoid any slippery operation.
That's why more than 90% of RC (serious) driver do polish their diff plates to have the smoother diff as possible.

The idea to make a groove in the diff plates is (to my humble opinion) not a good idea and a terrible waste of time (even while watching TV).
About the thurst bearing plates, if they are flat, the best is to keep them flat, so polishing them.
But some diffs (I'm thinking about Robitronic Avid) have a 8x3.5x3 thrust bearing with grooved plates. These are the strongest because the genuine machining is perfect and much preciser than a "Hand breaking made"...

Ideas and discussions are still open!

Nite
Slide
If you say so buddy.....
I know I tried polishing, sanding and the groove method so I'm speaking of experience... I never comment on something I didnt try yet, keeps me from making foolish remarks (since grip of the balls and plates is bad according to you, you must be the guy with a slipping diff).
__________________
Make it idiot-proof, and someone will make a better idiot.
Quante is offline   Reply With Quote
Old 09-07-2008, 07:36 PM   #8410
Tech Regular
 
Join Date: Oct 2002
Location: minn
Posts: 440
Trader Rating: 2 (100%+)
Default

I like the diff rings sanded smooth. I think the adjustmnet is critical.
It needs to be tight enough that it doesn`t slip on a hard straight line acceleration but loose enough to let the outside wheel rotate more around a corner. Diff adjustment can be a good tuning tool. I like the feel of the front diff being a little tighter than the rear.
__________________
TcORC president
Yokomo bd7 sedan, bd7 usgt
Roche rapide p12
magnum is offline   Reply With Quote
Old 09-07-2008, 09:21 PM   #8411
Tech Adept
 
Slideaway's Avatar
 
Join Date: Aug 2007
Location: Sinceny, France or Bangkok, Thailand
Posts: 218
Default

Oh Boy! Feelin' on defensive mind, Quante ;-)

Really, I'm quite sure you tried and approved your sayings before sharing them, I never meant otherwise.
Also according to my experience, I never met any slipping issues since I'm polishing my diff plates and with a normal tightening torque, the rotation of each outdrives is totaly free and reliable overtime. Anyway, thanks for your concern.

Everybody is free to use what they believe being the right method. It doesn't mean the other's technic is obligatorily the bad one.

There's no idiot around, all is about opening minds...

Slide
__________________
Ludo
Thai Ride Tech Support.
Slideaway is offline   Reply With Quote
Old 09-07-2008, 09:34 PM   #8412
Tech Elite
 
olhipster1's Avatar
 
Join Date: Dec 2004
Location: Asgard
Posts: 3,994
Trader Rating: 98 (100%+)
Send a message via Yahoo to olhipster1
Default

Thanks Martin, appreciate the response.
__________________
everything is Cause and effect
every Action has a reaction.
"I drank too much wine - I must take a p!ss"
CAUSE and EFFECT
olhipster1 is offline   Reply With Quote
Old 09-08-2008, 04:56 AM   #8413
Tech Adept
 
Join Date: Sep 2004
Location: UK
Posts: 108
Trader Rating: 1 (100%+)
Send a message via MSN to mark34 Send a message via Yahoo to mark34
Default only on forums lol

Blimey only wanted some advice on how to get the diff working sweet did not mean to start a war of words lol
Mark
__________________
Yokomo BD
CEFX C12

Powered By Demon Batteries and GM Brushless and 2 thumbs
Mark Ashby
mark34 is offline   Reply With Quote
Old 09-08-2008, 02:00 PM   #8414
Tech Master
 
Martin Hofer's Avatar
 
Join Date: Mar 2005
Location: Germany
Posts: 1,083
Send a message via ICQ to Martin Hofer
Default

blog updated ... just to let you know
__________________
Schumacher Racing
Team GM-Racing
Team Sorex
Xenon Racing
Tonisport
Martin Hofer is offline   Reply With Quote
Old 09-09-2008, 01:48 AM   #8415
Tech Adept
 
capellone24's Avatar
 
Join Date: Feb 2005
Posts: 100
Default

Congrats to Martin for the second place at the german TC championship !!!

http://www.redrc.net/2008/09/marc-fi...rman-tc-title/
capellone24 is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Yokomo MR4TC CGM wyl03 Australia For Sale/Trade 0 06-26-2007 04:39 PM
yokomo mr4tc pro racer57 R/C Items: For Sale/Trade 3 10-07-2006 02:34 AM
Looking for Yokomo MR4TC BD1 yyhayyim R/C Items: Wanted to Buy 1 08-24-2006 07:07 PM
yokomo mr4tc i730 R/C Items: For Sale/Trade 0 07-20-2005 02:51 PM
WTB: Yokomo MR4TC SD SSG! DOMOisCOOL R/C Items: Wanted to Buy 2 03-06-2004 08:31 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 05:20 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