Mugen MTX-4

Reply

Old 03-30-2009, 12:00 PM
  #9076  
Tech Elite
iTrader: (84)
 
lil-bump's Avatar
 
Join Date: Aug 2006
Location: The Cold Great Lakes
Posts: 2,975
Trader Rating: 84 (100%+)
Default

Originally Posted by asw7576 View Post
Got something to share after some research on belts.

Various RC belts and number of teeth for cross use / reference. I hope my work can be use for all of us.

BELT(T)........NT1........MTX4.......MTX3.......V1 RRR.......MRX4.......M3........G4S
FRONT..........62T........63T..........67T........ .63T............67T..........69T.......70T
MIDDLE. ......132T......129T.......125T........128T....... ...144T........140T......126T
REAR............59T........59T.........64T........ ..60T............67T..........67T........64T

Most RC belts are 3mm pitch belt.
The length of RC belts = total # teeth X 3mm

Examples : Evolva M3 middle belt is coded S3M420, S3M means 3mm pitch, 420 means 420 / 3 = 140 teeth.

Great info!!!!
lil-bump is offline  
Reply With Quote
Old 03-30-2009, 12:43 PM
  #9077  
Tech Regular
iTrader: (9)
 
Join Date: Jan 2008
Location: Round Rock, Texas
Posts: 295
Trader Rating: 9 (100%+)
Default Overdrive

ok so i finally got one after haveing a mtx3 for a while i decided to UPGRADE there is a wealth of info on here but i cant seem to find much about the side pullys like what affect the 25 has opposed to the 24 i dont know a whole lot about overdrive ratios i do understand the 1.1 means front and rear rotate at the same speed, but if i measure my tires and come out with say .996 with the 24 tooth does that meen that the front is spinnig faster or the rear is spinning faster?

Any help would be wonderful

Thanks Dustin
Roadrash730 is offline  
Reply With Quote
Old 03-30-2009, 11:42 PM
  #9078  
Tech Champion
 
asw7576's Avatar
 
Join Date: Sep 2004
Posts: 5,792
Default

Originally Posted by Roadrash730 View Post
ok so i finally got one after haveing a mtx3 for a while i decided to UPGRADE there is a wealth of info on here but i cant seem to find much about the side pullys like what affect the 25 has opposed to the 24 i dont know a whole lot about overdrive ratios i do understand the 1.1 means front and rear rotate at the same speed, but if i measure my tires and come out with say .996 with the 24 tooth does that meen that the front is spinnig faster or the rear is spinning faster?

Any help would be wonderful

Thanks Dustin
Look at overdrive charts for MTX3 or MTX4.

Anything above 1.0000 means OVER DRIVE ( front tires rotating FASTER than rear tires ). Examples : 1.0351 means 1.0000 - 1.0351 = 0.0351 x 100 = 3.51 %. Therefore, front tires is rotating 3.51% FASTER than rear tires.

Anything below 1.0000 means UNDER DRIVE ( front tires rotating SLOWER than rear tires ). Examples : 0.9152 means 1.0000 - 0.9152 = 0.0848 x 100 = 8.48 %. Therefore, front tires is rotating 8.48% SLOWER than rear tires.

Equal to 1.000 means FULL TIME 4WD.

However, since rear tires's diameter are wearing out at faster rate than front tires, we need to give some tire split by shaving front tires diameter before race. Most split range from 2mm to 3mm. Examples, front tires diameter before race : 62mm and rear tires before race : 64mm. Thus 2mm split.

Why tire split ? Because we can't drive very well when front tires have bigger diameter than rear tires ( I feel like I want to shoot the car ). ..... this is true for racing on long mains. We want driveable car for the whole mains. Another trick to slowdown rear tires wearing out faster than front is using 1 or 2 grade harder compound for rear tires. Examples, 35 shore for front, 40 shore for rear.

For MTX3. I find the nicest setup by going underdrive. Replace the rear side pulley 19T with 18T, and keep using 24T side pulley.

For MTX4. I also prefer underdrive with 25T side pulley.

Anyway, people may have different opinion and driving taste on these...... so please don't take my preferences without further testing on your own.
asw7576 is offline  
Reply With Quote
Old 03-31-2009, 05:24 AM
  #9079  
Tech Adept
 
Join Date: Mar 2003
Location: Tallinn, Estonia
Posts: 226
Default

Overdrive is not only about rotational speed, but about ROLLOUT (distance travelled per each clutchbell revolution).

2-2.5mm tire split is used not because of the wear issues, but because it is required with 24t pulley to get 1:1 overdrive. Since with 24t pulley the fronts rotate faster, they have to be smaller to get the same rollout as the rears have.
Equal size tires with 24t pulley would result in terrible overdrive.

The reason we use smaller fronts and 24t pulley instead of equals and 25t is handling. Basically, smaller tires offer less lateral (=sideways) grip, but are more consistant. Also the suspension geometry changes with smaller tires (arms/axles sit lower, this gives higher front roll centre). This just feels better most of the time.
The only time I use the 25t pulley (and equal size tires that this requires) is when it rains and I'm running Pit rubbers or when it looks like it will be raining 10 minutes into the final Although I have tried the 25t side and equal size foams on a dry loose track and found it quite usable, I like the consistency of smaller fronts more.
olev is offline  
Reply With Quote
Old 03-31-2009, 06:03 AM
  #9080  
Tech Master
iTrader: (2)
 
Winner's Circle's Avatar
 
Join Date: May 2005
Location: Atlanta, Georgia USA
Posts: 1,164
Trader Rating: 2 (100%+)
Default

Originally Posted by Roadrash730 View Post
ok so i finally got one after haveing a mtx3 for a while i decided to UPGRADE there is a wealth of info on here but i cant seem to find much about the side pullys like what affect the 25 has opposed to the 24 i dont know a whole lot about overdrive ratios i do understand the 1.1 means front and rear rotate at the same speed, but if i measure my tires and come out with say .996 with the 24 tooth does that meen that the front is spinnig faster or the rear is spinning faster?

Any help would be wonderful

Thanks Dustin
Dustin,

I have an excel spreadsheet that I created and it is set-up so that if you put the # of teeth on each pulley into it, the sheet will determine front to rear drive ratio based on tire diameter. This can be used for any 200mm or 1/8 car. The tire diameters are in a table so that you can quickly determine what size tire will give you the OD ratio you are seeking.

email me at [email protected] and I will send you a copy.

Lee
Winner's Circle is offline  
Reply With Quote
Old 04-02-2009, 05:57 PM
  #9081  
Tech Master
iTrader: (2)
 
beta bob's Avatar
 
Join Date: Mar 2007
Posts: 1,101
Trader Rating: 2 (75%+)
Default

Hey guys I decided to leave elec touring and come back to nitro and my friend has a mtx-4r and it is perfect at my track but the thing is people are stopping selling them so I was wondering if there is a new one coming out or should I just go ahead and buy one
beta bob is offline  
Reply With Quote
Old 04-02-2009, 07:14 PM
  #9082  
Tech Regular
iTrader: (9)
 
Join Date: Jan 2008
Location: Round Rock, Texas
Posts: 295
Trader Rating: 9 (100%+)
Default

thanks for all the great info guys
Roadrash730 is offline  
Reply With Quote
Old 03-09-2011, 01:46 AM
  #9083  
Tech Elite
iTrader: (13)
 
Chickentrader's Avatar
 
Join Date: Feb 2007
Location: Landsborough, Queensland, Australia.
Posts: 2,142
Trader Rating: 13 (100%+)
Default

Originally Posted by beta bob View Post
Hey guys I decided to leave elec touring and come back to nitro and my friend has a mtx-4r and it is perfect at my track but the thing is people are stopping selling them so I was wondering if there is a new one coming out or should I just go ahead and buy one
Check this thread: http://www.rctech.net/forum/nitro-ro...tx-5-a-26.html. However; an MTX4 ran 2nd in the worlds last year.

Kindest regards,
Lars.
Chickentrader is offline  
Reply With Quote
Old 03-09-2011, 07:05 AM
  #9084  
Tech Adept
 
Join Date: Mar 2003
Location: Tallinn, Estonia
Posts: 226
Default

Originally Posted by Chickentrader View Post
Check this thread: http://www.rctech.net/forum/nitro-ro...tx-5-a-26.html. However; an MTX4 ran 2nd in the worlds last year.

Kindest regards,
Lars.
Sometimes I'm just wondering why people reply to 2 years old threads... but I'm not sure I really want to know
olev is offline  
Reply With Quote
Old 03-09-2011, 08:23 AM
  #9085  
Tech Elite
iTrader: (13)
 
Chickentrader's Avatar
 
Join Date: Feb 2007
Location: Landsborough, Queensland, Australia.
Posts: 2,142
Trader Rating: 13 (100%+)
Default

Originally Posted by olev View Post
Sometimes I'm just wondering why people reply to 2 years old threads... but I'm not sure I really want to know
Thanks for the advice. I'll check the dates of the posts from now; I don't understand why this thread came up as updated on my subscribed threads?

Kindest regards,
Lars.
Chickentrader is offline  
Reply With Quote
Old 03-09-2011, 09:00 AM
  #9086  
Tech Elite
iTrader: (33)
 
Riketsu's Avatar
 
Join Date: Aug 2004
Location: Puerto Rico
Posts: 2,540
Trader Rating: 33 (100%+)
Default

Originally Posted by Chickentrader View Post
Thanks for the advice. I'll check the dates of the posts from now; I don't understand why this thread came up as updated on my subscribed threads?

Kindest regards,
Lars.


You are certainly not the first one nor the last that have that happened to them...
Riketsu is offline  
Reply With Quote
Old 08-15-2011, 10:48 AM
  #9087  
Tech Champion
 
asw7576's Avatar
 
Join Date: Sep 2004
Posts: 5,792
Default mugen clutch shoes

Which one is made from harder material :

grey clutch or yellow clutch ?

what is the main difference between the grey and yellow ?

I forgot oredi ......
asw7576 is offline  
Reply With Quote
Old 08-30-2011, 06:15 PM
  #9088  
Tech Master
iTrader: (34)
 
TC_Tuner's Avatar
 
Join Date: Jan 2005
Location: SE Wisco
Posts: 1,072
Trader Rating: 34 (100%+)
Default

anyone in need of a MR4r AND a MRX4x roller plus LOTS of parts? I got what ya'll need
TC_Tuner is offline  
Reply With Quote

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 Terms of Service