R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 03-11-2012, 09:36 PM   #1846
Tech Champion
 
Join Date: Mar 2006
Location: www.moorebankraceway.com
Posts: 5,119
Trader Rating: 10 (100%+)
Default

Quote:
Originally Posted by Bishop View Post
No, the outdrive shafts were tight in the diff half holes, one side in particular was very tight/stiff, which would have been what was causing the diff to keep failing.

When I build my own diffs I actually put a tiny bit of grease on the outdrive pins before I slide them into the case, but I don't think that is suggested in the Mugen build manual so I'm guessing most don't do it.

In Greg's case I'm not sure what happened, or what caused it, just it really stuffed up each rebuild he kept doing within the same diff cases.
i found my diff fromt he kit also had this issue, there was a very tight fit on the pin that went through the outdrive that sat on top of the large washer. I think it is due to the o ring. i found the kit o ring was a little bit big. i managed to squish it all in and there doesn't seem to be a problem with the diff...but i only used it for 1 litre or so.
TomB is offline   Reply With Quote
Old 03-11-2012, 10:19 PM   #1847
Tech Elite
 
Bishop's Avatar
 
Join Date: May 2004
Location: Brisbane
Posts: 2,223
Trader Rating: 5 (100%+)
Default

Not the o-ring, it was tight with just the shaft in, and when I say tight, I mean like binding up in a major way, and not just a little hard to spin.
__________________
QRCCRA
www.qrccra.org.au
www.facebook.com/englandparkraceway
www.myrcm.ch/main?pLa=en&hId[1]=org&dId[O]=4331
Bishop is offline   Reply With Quote
Old 03-12-2012, 02:22 AM   #1848
Tech Regular
 
djiewie's Avatar
 
Join Date: Aug 2010
Posts: 440
Default

Well, at least there is no play. But this can be easily rectified by polishing the shafts. The shafts has to rotate free without play.

Maybe a 6mmm reamer will do the trick?? I don`t know the shafts diameter though.
djiewie is offline   Reply With Quote
Old 03-12-2012, 03:47 AM   #1849
Tech Elite
 
blis's Avatar
R/C Tech Elite Subscriber
 
Join Date: May 2008
Location: Brisbane
Posts: 3,434
Default

Quote:
Originally Posted by greg.dawn View Post
we tried km aluminium ones same as plastic after saturday we broke a diff every heat standard ones lasted 6 laps now we find out diff plastic bits that out drives go in are way to tight and this is probably the cause of all our diff troubles i though they were tight to stop leaking borrowed one from bishop and with steel already installed and bailey got to run in final with no troubles diff is still real smooth but fuel line came off at start /to lose bloody coloured stuff thanks for lend off diff bishop fellow mugen driver
greg
Greg get a new housing and internal, standard MTX5. FILL TME RIGHT UP with heavy oil so that your diff gears dont need to work hard at all and work from there. If Jeff did 93 laps, do what he is doing!
__________________
RC Cars: E4/G4/TCX/LAB-C02/T4'15/MM Engines
WEB: Beachmums Racing - MYRCM Race Registration
Media: Amain - RCRacingTV - RedRC - LiveRC - blisx264
blis is offline   Reply With Quote
Old 03-12-2012, 05:08 AM   #1850
Tech Fanatic
 
Join Date: Mar 2009
Posts: 753
Default diff

out drives were that tight you needed strong hands just to turn them they were not that tight when we put kit together
greg
greg.dawn is offline   Reply With Quote
Old 03-12-2012, 08:03 PM   #1851
Tech Regular
 
Perez's Avatar
 
Join Date: Aug 2003
Location: Santa Cruz
Posts: 319
Trader Rating: 4 (100%+)
Default

Just weighed my car with 1450 life, one low profile servo (throttle), some ti screws, steel rear diff and it came out to 1705 grams!!

It seems like the only option for me is maybe finding a 700 mah life battery (if one exist), Titanium pivot balls, and a low profile steering servo. I am not a big fan of the Low profiles for steering as they seem a little too slow for my taste but if i'm gonna make it anywhere close to 1525 , ive gotta loose weight!
Perez is offline   Reply With Quote
Old 03-12-2012, 08:15 PM   #1852
Tech Master
 
CanyonCarverR1's Avatar
 
Join Date: Jan 2008
Location: NorCal
Posts: 1,340
Trader Rating: 13 (100%+)
Default

Quote:
Originally Posted by Perez View Post
Just weighed my car with 1450 life, one low profile servo (throttle), some ti screws, steel rear diff and it came out to 1705 grams!!

It seems like the only option for me is maybe finding a 700 mah life battery (if one exist), Titanium pivot balls, and a low profile steering servo. I am not a big fan of the Low profiles for steering as they seem a little too slow for my taste but if i'm gonna make it anywhere close to 1525 , ive gotta loose weight!
I was told that when using low profile servos, you have to add weight in order to balance the car laterally. How does yours balance?
I think I know you from RAMS, it will be good to see a few Mugens at NorCal.
CanyonCarverR1 is offline   Reply With Quote
Old 03-13-2012, 01:08 AM   #1853
Tech Champion
 
Join Date: Mar 2006
Location: www.moorebankraceway.com
Posts: 5,119
Trader Rating: 10 (100%+)
Default

double post

Last edited by TomB; 03-13-2012 at 01:19 AM.
TomB is offline   Reply With Quote
Old 03-13-2012, 01:14 AM   #1854
Tech Champion
 
Join Date: Mar 2006
Location: www.moorebankraceway.com
Posts: 5,119
Trader Rating: 10 (100%+)
Default

Quote:
Originally Posted by Perez View Post
Just weighed my car with 1450 life, one low profile servo (throttle), some ti screws, steel rear diff and it came out to 1705 grams!!

It seems like the only option for me is maybe finding a 700 mah life battery (if one exist), Titanium pivot balls, and a low profile steering servo. I am not a big fan of the Low profiles for steering as they seem a little too slow for my taste but if i'm gonna make it anywhere close to 1525 , ive gotta loose weight!

i recently purchased the mugen Ti pivot balls (full set). compared to the steel pivot balls the Ti's are 9.3 grams lighter.

with two sanwa VZ servos weight = 120 grams (shortened wires)
with a Sanwa vz and a ko low profile servo = 102.1 (shortened wires)
with two ko propo RSx one10 servos = 101.8 (non shortened wires)
considering you are using lipos you would want to use the ko propo RSxone10 low profile servos.

i have recently eliminated my reciver box and novak regulator. with these items off the car i saved 25 grams.

depending on what servos you use with the above changes you can save 34.3 to 52.2 grams

add to this a full Ti screw kit and you might save another 20 or 30 grams.

add to this ceramic bearing kit and you save more weight. maybe another 10 or 15 grams.

take away the centre weight = another -18 grams.

total of 82.3 grams to 115.2 grams

other options:
-Ti turn buckles
-Capricorn mtx4 cvd shafts
-capricorn Ti arm pins
-nylon pivot ball nuts
-smaller receiver battery
- light weight engine heatsink
TomB is offline   Reply With Quote
Old 03-13-2012, 03:24 AM   #1855
Tech Elite
 
Bishop's Avatar
 
Join Date: May 2004
Location: Brisbane
Posts: 2,223
Trader Rating: 5 (100%+)
Default

I'm a little surprised anyone is having trouble being light, possibly choice of running gear, but I'll have to recheck mine once it's ready to go again, as I did notice my new engine is a shade heavier, and the metal rear gear diff is likely to bring up my weight up a bit.
__________________
QRCCRA
www.qrccra.org.au
www.facebook.com/englandparkraceway
www.myrcm.ch/main?pLa=en&hId[1]=org&dId[O]=4331
Bishop is offline   Reply With Quote
Old 03-13-2012, 10:21 AM   #1856
Tech Adept
 
Join Date: Mar 2007
Posts: 184
Default

so has this diff issue been resolved for you guys? I havent had a problem yet...
Ghett0 is offline   Reply With Quote
Old 03-13-2012, 03:03 PM   #1857
Tech Master
 
YLLIB's Avatar
 
Join Date: Sep 2001
Location: California
Posts: 1,709
Trader Rating: 1 (100%+)
Default

Hello everyone, the new parts are in from A PLUS RC Products and the Only hobby shop in the USA to have them in stock too sell. The company makes parts for most cars, pullies, arm mounts, servo savers, sway bar mounts and cluches, (clutches have been proven to work)./ A-Plus clutch was used and podiumed in the A main at the Florida Winter Nats three weeks ago.
The pullies are also HARD anodized and the parts are anodized Blue and look nicely machined.

The parts we have now are for the RX8 1/8 X-RAY & MTX5 1/10 Mugen.

We also have the newest tecnology of clutches for 1/10 and 1/8th universal clutch.

I know I will have on my new car, my mugen one work well and these look lighter..

Please go to www.acornracingusa.com for info on the NEW product and other nitro on-road racing product need.

A-Plus products are up on the site now, but I am waiting to recive pricing to post and pictures to add on the site by tomorrow, I hope.

The web mail order is open to use and the inventory is live and accurete. I am a little behind but reciving packages everyday to add invetory.

The grand opening of the site is March 16..

ACORN is for the serious 1/10 & 1/8th On-Road nitro racer.

Thank you Billy
YLLIB is offline   Reply With Quote
Old 03-16-2012, 04:11 AM   #1858
Tech Fanatic
 
Join Date: Mar 2009
Posts: 753
Default diffs

i have no idea what was wrong with the other 2 diffs but new ones are really good and car has some roll now steel in back and the original ones in front plastic still looks good
greg
greg.dawn is offline   Reply With Quote
Old 03-16-2012, 11:53 AM   #1859
Tech Fanatic
 
gotmotor's Avatar
 
Join Date: Nov 2007
Posts: 760
Default

http://www.rctech.net/forum/attachme...1&d=1331920384
Attached Thumbnails
MTX 5-426036_399541413406208_100000510571525_1543646_880756138_n.jpg  
__________________
RcTarget~KO~VP Fuel~OS~Matrix
gotmotor is offline   Reply With Quote
Old 03-16-2012, 12:03 PM   #1860
Tech Regular
 
Perez's Avatar
 
Join Date: Aug 2003
Location: Santa Cruz
Posts: 319
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by gotmotor View Post
is that another Shing production?

Think I might be able to make it to the Montica race next weekend , if its not raining...
Perez is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Mugen MTX-3 university_dave Nitro On-Road 17237 12-30-2012 01:16 PM
Mugen MTX-4 Grasshopperr Nitro On-Road 9087 08-30-2011 07:15 PM
Singapore National Series, 2009 Round 2 bullygod Singapore R/C Racers 21 06-27-2009 07:00 AM
Inter-State Racing Competetion Mie3R Malaysian R/C Racers 510 08-12-2008 10:41 PM
INTI College 1/10 Gas Touring (Sarawak,Kuching) LAKIA Malaysian R/C Racers 41 10-18-2007 06:46 PM
TQ With Serpent 720 on 23 & 24 December 2006 in Miri weechor Malaysian R/C Racers 119 02-01-2007 07:04 AM
LRP Nitro Masters 2006 Malaysia HPC II Malaysian R/C Racers 435 06-28-2006 09:03 AM



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 11:32 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