R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 03-30-2009, 01:00 PM   #9076
Tech Elite
 
lil-bump's Avatar
 
Join Date: Aug 2006
Location: The Cold Great Lakes
Posts: 2,964
Trader Rating: 83 (100%+)
Default

Quote:
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!!!!
__________________
Elliott Hart
Serpent America
Desoto Racing Team
Chicky fan club member #9
One Eighth Racers of Toledo
lil-bump is offline   Reply With Quote
Old 03-30-2009, 01:43 PM   #9077
Tech Regular
 
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
__________________
Capricorn LAB C-01 / RBtj 10 / Spectrum DX3
Roadrash730 is offline   Reply With Quote
Old 03-31-2009, 12:42 AM   #9078
Tech Champion
 
asw7576's Avatar
 
Join Date: Sep 2004
Posts: 5,792
Default

Quote:
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.
__________________
On Road : Xray NT1 , RX8 , T4 || Mugen Seiki MRX4-R , MTX4 , MTX3 prospec || Tamiya M03 , M04 || Top Racing Sabre FD2
Off Road : Xray XT8 || Hobao Hyper 8
Radio : Futaba 3PKS || KO propo EX-10 eurus
asw7576 is offline   Reply With Quote
Old 03-31-2009, 06:24 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, 07:03 AM   #9080
Tech Master
 
Winner's Circle's Avatar
R/C Tech Elite Subscriber
 
Join Date: May 2005
Location: Atlanta, Georgia USA
Posts: 1,156
Trader Rating: 2 (100%+)
Default

Quote:
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
__________________
Lee Muse
[email protected]
Kyosho ST-RR, Kyosho MP9, Murnan Modified Engines
Winner's Circle is offline   Reply With Quote
Old 04-02-2009, 06:57 PM   #9081
Tech Master
 
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
__________________
Team Terribles---------2009 post of the year
"Cant you read Mopar???He said that he drives a T-max 2.5!!!!"
Spec classes are for communist
beta bob is offline   Reply With Quote
Old 04-02-2009, 08:14 PM   #9082
Tech Regular
 
Join Date: Jan 2008
Location: Round Rock, Texas
Posts: 295
Trader Rating: 9 (100%+)
Default

thanks for all the great info guys
__________________
Capricorn LAB C-01 / RBtj 10 / Spectrum DX3
Roadrash730 is offline   Reply With Quote
Old 03-09-2011, 02:46 AM   #9083
Tech Elite
 
Chickentrader's Avatar
 
Join Date: Feb 2007
Location: Landsborough, Queensland, Australia.
Posts: 2,142
Trader Rating: 13 (100%+)
Default

Quote:
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.
__________________
Support your local RC stores - they support our sport!
Social media The empowerment of the small individual to enforce democratic process at the expense of dishonesty.
Chickentrader is offline   Reply With Quote
Old 03-09-2011, 08:05 AM   #9084
Tech Adept
 
Join Date: Mar 2003
Location: Tallinn, Estonia
Posts: 226
Default

Quote:
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, 09:23 AM   #9085
Tech Elite
 
Chickentrader's Avatar
 
Join Date: Feb 2007
Location: Landsborough, Queensland, Australia.
Posts: 2,142
Trader Rating: 13 (100%+)
Default

Quote:
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.
__________________
Support your local RC stores - they support our sport!
Social media The empowerment of the small individual to enforce democratic process at the expense of dishonesty.
Chickentrader is offline   Reply With Quote
Old 03-09-2011, 10:00 AM   #9086
Tech Elite
 
Riketsu's Avatar
 
Join Date: Aug 2004
Location: Puerto Rico
Posts: 2,514
Trader Rating: 32 (100%+)
Send a message via AIM to Riketsu
Default

Quote:
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...
__________________
eBay user id: riketsukirai
Riketsu is offline   Reply With Quote
Old 08-15-2011, 11:48 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 ......
__________________
On Road : Xray NT1 , RX8 , T4 || Mugen Seiki MRX4-R , MTX4 , MTX3 prospec || Tamiya M03 , M04 || Top Racing Sabre FD2
Off Road : Xray XT8 || Hobao Hyper 8
Radio : Futaba 3PKS || KO propo EX-10 eurus
asw7576 is offline   Reply With Quote
Old 08-30-2011, 07:15 PM   #9088
Tech Master
 
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
__________________
Airtronics | Byron's Fuel | Pro-Line | OS | Kyosho | Ballistic Batteries | RIP Al's Hobby Shop
MRX4-X F180 Cobra Zipper Kart Yokomo BD Cup Racer FM1e Recoil M18 Pro Scalpel dNaNo Baja 5T HB D8 Vorza ERevo Savage Flux SCX10 GT2 T4 Slash Ten SCTE Blitz ESE HB Cyclone D4 Mini ERevo Vendetta ST Mini T Micro T
TC_Tuner is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
MUGEN MBX5R/MUGEN MBX5T PROSPEC/TRAXXAS RACE REVO Jason Halvorson R/C Items: For Sale/Trade 14 01-12-2008 10:32 AM
Mugen 5T Chassis, Mugen 46 Tooth Pinion, Associated Ride Height Gauge bretzkej R/C Items: For Sale/Trade 1 08-19-2007 06:31 PM
USA's Most Wanted FOR SALE Mugen MBX5R,Losi 8 comp, and Mugen MBX5T Prospec Truggy nobike R/C Items: For Sale/Trade 69 04-28-2007 07:45 PM
Another MTX3 prospec w lots of parts and an optional Mugen X12 w Mugen pipe Scott Fisher R/C Items: For Sale/Trade 11 11-21-2005 05:45 PM
drake xxx nt and mugen mst-1+extras......Looking for a kanai 2 or maybe mugen buggy [email protected] R/C Items: For Sale/Trade 5 06-30-2003 09:31 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 01:55 PM.


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