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

Tamiya mini cooper

Like Tree288Likes

Tamiya mini cooper

Old 03-03-2017, 12:44 PM
  #28741  
Tech Regular
iTrader: (2)
 
losi's Avatar
 
Join Date: Oct 2002
Location: Singapore
Posts: 297
Trader Rating: 2 (100%+)
Default

Hi

Does anybody have any idea on how to mount the rear carbon damper stay on M05 for long wheelbase? Somehow lose the manual for the carbon damper stay.

Thanks in advance!
losi is offline  
Old 03-04-2017, 03:08 AM
  #28742  
Tech Fanatic
 
Schs2013's Avatar
 
Join Date: Jan 2013
Location: Edmonton, AB Canada
Posts: 853
Default

Originally Posted by monkeyracing View Post
Ooh! New diff from RCMart's house brand, Yeah Racing. Looks a lot like the others that are out there already, but comes with a chunk to turn it into a spool, should the need arise. Neat.



For M05 - Yeahracing - (#TAMC-023) 38T Gear Differential Set For Tamiya M05 M06
The quality looks nice. What would the difference between a spool to diff is it a simple locker? And how does a spool affect in turns verus a diff. Im sure I asked this question in past
Schs2013 is offline  
Old 03-04-2017, 11:06 AM
  #28743  
Tech Initiate
 
Join Date: Jul 2016
Location: Alberta
Posts: 27
Default

Spool = fully locked diff (no diff action). So yes, spool is the same as saying locked diff. It would widen turning radius (make the M05 chassis understeer more) as it splits the torque 50/50 all the time to both front wheels. Would cause a little more scrubbing of the tires during cornering as well, which may (or may not) have a minor effect on life of the tires. But it all comes down to setup of everything else in its entirety as well...

I wonder if that diff is made in the same factory as the 3racing one - the plastic and general forming of the parts look identical (but I'm also comparing the pic to the 3racing one's I have on hand). If it is, I wonder why they opted for a plastic spider gear cross as opposed to the split steel one... (not that it truly matters).
RCReggie is offline  
Old 03-04-2017, 01:59 PM
  #28744  
Tech Elite
iTrader: (2)
 
gigaplex's Avatar
 
Join Date: Dec 2015
Location: Melbourne, VIC
Posts: 4,994
Trader Rating: 2 (100%+)
Default

Originally Posted by RCReggie View Post
Spool = fully locked diff (no diff action). So yes, spool is the same as saying locked diff. It would widen turning radius (make the M05 chassis understeer more) as it splits the torque 50/50 all the time to both front wheels. Would cause a little more scrubbing of the tires during cornering as well, which may (or may not) have a minor effect on life of the tires. But it all comes down to setup of everything else in its entirety as well...

I wonder if that diff is made in the same factory as the 3racing one - the plastic and general forming of the parts look identical (but I'm also comparing the pic to the 3racing one's I have on hand). If it is, I wonder why they opted for a plastic spider gear cross as opposed to the split steel one... (not that it truly matters).
Actually the open diff is equal torque to both wheels. A locked diff or spool is equal speed to both wheels.
gigaplex is offline  
Old 03-04-2017, 03:09 PM
  #28745  
Tech Fanatic
 
Schs2013's Avatar
 
Join Date: Jan 2013
Location: Edmonton, AB Canada
Posts: 853
Default

Thanks for the explanation guys.
Schs2013 is offline  
Old 03-04-2017, 06:31 PM
  #28746  
R/C Tech Elite Member
iTrader: (10)
 
monkeyracing's Avatar
 
Join Date: Mar 2008
Location: Calgary, AB
Posts: 6,304
Trader Rating: 10 (100%+)
Default

I think my love of the M04 is finally over. It seems they don't like brushless based torque. I've blown through at least 3 diffs in 6 months, even with limited track time and careful builds. Last night, I mysteriously melted the guts of the gearbox. The bosses the gear shafts are set into got warm and went all bell shaped. Bearings were good. Can't figure it out. Had enough.

The M05 was friggin outstanding though, so it's the go to for now. With the new, black carpet, setup has been simplified. Stock camber, yellow springs and 40wt all around.
monkeyracing is offline  
Old 03-05-2017, 12:46 AM
  #28747  
Tech Initiate
 
fritzthecat's Avatar
 
Join Date: Jun 2013
Location: Austria, ST.P.
Posts: 21
Default

Originally Posted by losi View Post
Hi

Does anybody have any idea on how to mount the rear carbon damper stay on M05 for long wheelbase? Somehow lose the manual for the carbon damper stay.

Thanks in advance!
https://www.tamiyausa.com/product/it...oduct-id=54475

Look down and click on manual.
i hope that helps.

Greetings fritz
fritzthecat is offline  
Old 03-05-2017, 09:31 AM
  #28748  
Tech Regular
 
ruebiracer's Avatar
 
Join Date: Feb 2011
Location: Southern Germany
Posts: 366
Default

Originally Posted by monkeyracing View Post
I think my love of the M04 is finally over. It seems they don't like brushless based torque. I've blown through at least 3 diffs in 6 months, even with limited track time and careful builds. Last night, I mysteriously melted the guts of the gearbox. The bosses the gear shafts are set into got warm and went all bell shaped. Bearings were good. Can't figure it out. Had enough.

The M05 was friggin outstanding though, so it's the go to for now. With the new, black carpet, setup has been simplified. Stock camber, yellow springs and 40wt all around.
Hi Jim,
that sounds indeed strange with your M04! Havenīt used mine since I got my M06 some years ago, but drivetrain is quite solid usually. Guess you use the stock gear diff, right?
Do you use AW grease in it? What parts are damaged, outdrive axles? Axle seats in the housing should not wear out due to heat usually. Bearings are really o.k.? What brushless do you use, guess no 10t?
Is the motor isolated by the cartdrige sheet from the plastic?

Lot of questions, but I would not expect a failure in the stock gear diff of a Mini from my experience over the years.
I know you donīt like the M06, so lets sort your problem on the M04 out to keep you spinning the rear wheels, too!

Br,
Matthias
ruebiracer is offline  
Old 03-05-2017, 03:25 PM
  #28749  
R/C Tech Elite Member
iTrader: (10)
 
monkeyracing's Avatar
 
Join Date: Mar 2008
Location: Calgary, AB
Posts: 6,304
Trader Rating: 10 (100%+)
Default

Originally Posted by ruebiracer View Post
Lot of questions, but I would not expect a failure in the stock gear diff of a Mini from my experience over the years.
I know you donīt like the M06, so lets sort your problem on the M04 out to keep you spinning the rear wheels, too!
Heya. Yeah, stock diff. I've built so many of these and have seen so few failures in my FWD cars. We did see an increase in failures a few years ago when the M06 became popular, but not nearly what I've experienced n the past year with the M04.

Diffs are built carefully - well beyond instruction manual levels. I've even gone so far as to deburr all the internals and break in the gears manually, followed by cleaning and inspection afterwards. AW grease is always used.

The motors are 18t versions of the "Hobbywing style" cans. They spin around 2200kv and have a little more torque than the 13t. When my race finished o Friday, I picked up my car and the motor was HOT. I don't think the gasket would have made a difference in this case.

The only conclusions I can come to are that the extra wheelspin created by a very loose diff in a RWD car is creating extra heat/wear internally. As to my breakdown on Friday, I'll go through the bearings again very carefully and look for signs of heating on the gear shafts.

Thanks, Jim

Last edited by monkeyracing; 03-05-2017 at 03:39 PM.
monkeyracing is offline  
Old 03-05-2017, 08:04 PM
  #28750  
Tech Fanatic
iTrader: (72)
 
Rich Panganiban's Avatar
 
Join Date: Nov 2004
Location: Southern California
Posts: 814
Trader Rating: 72 (100%+)
Default

Any suggestions on which rear upright (as far as rear toe-in) to run on a medium bite asphalt track?

Thanks!
Rich Panganiban is offline  
Old 03-06-2017, 12:27 PM
  #28751  
Tech Elite
 
sosidge's Avatar
 
Join Date: Dec 2001
Location: Bristol, UK
Posts: 4,284
Default

Originally Posted by Rich Panganiban View Post
Any suggestions on which rear upright (as far as rear toe-in) to run on a medium bite asphalt track?

Thanks!
I haven't tried it out on asphalt yet, but I have found that the move from 2deg toe to 3deg rear toe has been a big improvement on carpet and I would probably start with 3deg. I achieve it with Tamiya's 1 degree toe-in suspension mount and the kit hubs.
Rich Panganiban likes this.
sosidge is offline  
Old 03-06-2017, 01:12 PM
  #28752  
Tech Fanatic
iTrader: (72)
 
Rich Panganiban's Avatar
 
Join Date: Nov 2004
Location: Southern California
Posts: 814
Trader Rating: 72 (100%+)
Default

Thanks for that!

1 degree always seems so "skate-y", but I'm sure it's faster under certain conditions.
Rich Panganiban is offline  
Old 03-06-2017, 01:31 PM
  #28753  
Tech Elite
iTrader: (1)
 
KA2AEV's Avatar
 
Join Date: Jan 2012
Location: Tottenville, NYC
Posts: 2,235
Trader Rating: 1 (100%+)
Default

Originally Posted by Rich Panganiban View Post
Any suggestions on which rear upright (as far as rear toe-in) to run on a medium bite asphalt track?

Thanks!
Rich
Im not familiar with Southern Cali being from NYC and all, but I knew
a guy out that way who was extremely smart and helpful who passed
away not too long ago that told me about a group of guys out there
who run Minis exclusively and they are really helpful to new people
who approach them.
They are called "The Mini Mafia" so if you run across them at any of
the tracks you race at, approach them and they could really get you
set up!

Mike
Rich Panganiban likes this.
KA2AEV is offline  
Old 03-06-2017, 02:09 PM
  #28754  
Tech Regular
 
ruebiracer's Avatar
 
Join Date: Feb 2011
Location: Southern Germany
Posts: 366
Default

Originally Posted by sosidge View Post
I haven't tried it out on asphalt yet, but I have found that the move from 2deg toe to 3deg rear toe has been a big improvement on carpet and I would probably start with 3deg. I achieve it with Tamiya's 1 degree toe-in suspension mount and the kit hubs.
Thanks for this info Sosidge!
Can you explain a bit more the difference? I thought about reducing the rear toe to get more steering, but I also think, rear toe helps to warm up the rear tires especially on the first 3 laps and get a stable rear end...

Will definitely give your tip a try, as Iīve lying around the plate for some time now, but never tried it so far!

Br,
Matthias
ruebiracer is offline  
Old 03-06-2017, 02:18 PM
  #28755  
Tech Regular
 
ruebiracer's Avatar
 
Join Date: Feb 2011
Location: Southern Germany
Posts: 366
Default

Originally Posted by monkeyracing View Post
Heya. Yeah, stock diff. I've built so many of these and have seen so few failures in my FWD cars. We did see an increase in failures a few years ago when the M06 became popular, but not nearly what I've experienced n the past year with the M04.

Diffs are built carefully - well beyond instruction manual levels. I've even gone so far as to deburr all the internals and break in the gears manually, followed by cleaning and inspection afterwards. AW grease is always used.

The motors are 18t versions of the "Hobbywing style" cans. They spin around 2200kv and have a little more torque than the 13t. When my race finished o Friday, I picked up my car and the motor was HOT. I don't think the gasket would have made a difference in this case.

The only conclusions I can come to are that the extra wheelspin created by a very loose diff in a RWD car is creating extra heat/wear internally. As to my breakdown on Friday, I'll go through the bearings again very carefully and look for signs of heating on the gear shafts.

Thanks, Jim
Hi Jim, really interested in some pics of your damages. 18t should really be no problem. Do you drive the diff very loose, although greasing with AW? Should give some stiffer action, at least for some laps. Ever tried a more closed diff in your M04? I made some good experince with tighter diffs in my M06 the last 2 years, although I never thought this could work in an RWD Rc-car.
Could reduce the revolutions of your counter gears and help to extend the life span maybe...
I think, also quality of the metal parts reduced the last years, as one race collegue also shreded this diff in his M06 shortly after finishing the kit.
Back in the days in my M02 I never had a problem even with some hotter brushed motors in racing driving it RWD.

All the best for your analyze of the sucker,
Matthias
ruebiracer is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.