R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 03-12-2009, 08:53 AM   #1
Tech Apprentice
 
Join Date: Feb 2009
Posts: 53
Default mugen prospec steering problems!!!

good day all. I recently picked up a slightly used mbx5t prospec it goes great im using a Axial 28rr engine the chassis is set up per what the manual says ,it just won't steer it pushes very bad any help would be swell thanks. mike
bajamike207 is offline   Reply With Quote
Old 03-12-2009, 09:05 AM   #2
Tech Regular
 
markr04's Avatar
 
Join Date: Jan 2009
Location: TX
Posts: 421
Trader Rating: 1 (100%+)
Default

I had one. It's a heavy car and turning was nothing like my 8ight. It's still a great car, just need to adjust driving habits to make it work for you.
__________________
Xray 808 2010 Spec - O.S. V-Spec Speed - Airtronics M11-DSSS
Losi 8ight-T 2.0 - RB Killer 9 - Airtronics M11-FHSS-2
Losi XXX-CR - Tekin RS / Novak Ballistic 13.5 - Airtronics M11-FHSS-2
markr04 is offline   Reply With Quote
Old 03-12-2009, 09:46 AM   #3
Tech Fanatic
 
wallot's Avatar
 
Join Date: Jan 2009
Location: Czech Republic
Posts: 870
Default

use lighter rear diff oil ( I use 2000)
use as little front toe as possible without car being unstable exiting corners and on straights
__________________
DEX408 - Speed Passion Silver Arrow v2, LRP Dynamic 8
Dex410 V3 - Tekin RS Pro, 7.5t Redline
F1-09 - Tekin RS Pro, 17.5t Redline
Sakura Zero S - LRP Quantum, Saturn 20T
KoPropo Eurus
wallot is offline   Reply With Quote
Old 03-12-2009, 10:24 AM   #4
Tech Elite
 
imaxx21's Avatar
 
Join Date: Nov 2007
Location: FL
Posts: 2,725
Trader Rating: 1 (100%+)
Send a message via AIM to imaxx21
Default

drop to a 2 rear toe block
__________________
-Crash
Upgrade RC www.upgrade-rc.com
imaxx21 is offline   Reply With Quote
Old 03-12-2009, 11:50 AM   #5
Tech Apprentice
 
Join Date: Feb 2009
Posts: 53
Default mugen truggy steering

thanks for the tips, the manual says diff fluid is 5k 2k 2k that seems seem very light, the local track has a good clay and sand surface, good traction! should i be running heavier fluids? maybe help my steering issues?? any help would be swell. mike
bajamike207 is offline   Reply With Quote
Old 03-12-2009, 12:02 PM   #6
Tech Elite
 
jpalessi's Avatar
R/C Tech Elite Subscriber
 
Join Date: Feb 2008
Location: SoCal
Posts: 4,747
Trader Rating: 55 (100%+)
Send a message via AIM to jpalessi Send a message via Skype™ to jpalessi
Default

move the upper arms forward.
__________________
Joe Alessi
www.Lucky7RC.com
jpalessi is offline   Reply With Quote
Old 03-12-2009, 12:30 PM   #7
Tech Fanatic
 
wallot's Avatar
 
Join Date: Jan 2009
Location: Czech Republic
Posts: 870
Default

I use 7/10/2 in my diffs
__________________
DEX408 - Speed Passion Silver Arrow v2, LRP Dynamic 8
Dex410 V3 - Tekin RS Pro, 7.5t Redline
F1-09 - Tekin RS Pro, 17.5t Redline
Sakura Zero S - LRP Quantum, Saturn 20T
KoPropo Eurus
wallot is offline   Reply With Quote
Old 03-12-2009, 02:53 PM   #8
Tech Elite
 
allan42r's Avatar
 
Join Date: Jun 2008
Location: OSWEGO IL.
Posts: 2,602
Default

lets see some pics and see what's going on. the truggy with a 21 , 7 10 3 in the diffs with a more powerfull 28 go with 20 in the center to keep the front from "diffing". also dont use any of the smaller s3 orings in the diffs just the larger s5's that fit over the outdrives.

shocks 450/400 with 1.5 pistons red springs. dogbones level with a full tank of fuel.

what tires are you using on what type of track?
__________________
Pinky kisses better than mason's mom
allan42r is offline   Reply With Quote
Old 03-12-2009, 04:08 PM   #9
Tech Apprentice
 
Join Date: Feb 2009
Posts: 53
Default prospec

i'm using pro-line bowties mtr m2 our local track has a good firm clay/sand mix after a little watering, lots of traction. i'm going to rebuild the diffs this weeekend (i'm not sure what was used in the diffs before i bought it] it was late in the season.i'try to get some pics soon... i'm using a .28 motor it goes great, just doesn't steer well . i will be rebuilding the shocks as well those oil wts 450/400, what is a good equivelent?? i have lots of different wts from 20 - 50 thank for tips, mike
bajamike207 is offline   Reply With Quote
Old 03-13-2009, 04:20 AM   #10
Tech Elite
 
DOMIT's Avatar
 
Join Date: Oct 2007
Location: Fort Worth, Texas, USA, North America, Earth, Solar System, Milky Way Galaxy, Universe
Posts: 4,034
Trader Rating: 1 (100%+)
Send a message via MSN to DOMIT Send a message via Yahoo to DOMIT
Default

Quote:
Originally Posted by bajamike207 View Post
i'm using pro-line bowties mtr m2 our local track has a good firm clay/sand mix after a little watering, lots of traction. i'm going to rebuild the diffs this weeekend (i'm not sure what was used in the diffs before i bought it] it was late in the season.i'try to get some pics soon... i'm using a .28 motor it goes great, just doesn't steer well . i will be rebuilding the shocks as well those oil wts 450/400, what is a good equivelent?? i have lots of different wts from 20 - 50 thank for tips, mike
I haven't had a Mugen truggy, just the buggy... but here are some suggestions based on the buggy:

1) 2 degree rear toe as suggested.

2) IF they make one for the truck, replace the metal front chassis brace with the plastic "turnbuckle" style one. On the buggy that came on the non-prospec car.

3) The happiest I was with the steering on the buggy was when the swaybar end link popped loose during a race... it helped a lot. Try it with no front swaybar... or go to the local hobby shop and buy some piano wire that is about 1/2 the diameter of the stock swaybar, and make you one. Also for smaller adjustments, moving the swaybar end links OUT makes the swaybar act softer, and IN makes it feel stiffer.

You can stiffen up the rear (which makes the front softer by contrast, which is the whole point) by going to the biggest swaybar you can get, and by moving the end links in as far as you can while still allowing full suspension travel without binding.

4) Try 7-10-1 (front to rear) in the diffs. I run 7-10-2 on the Jammin...

5) I don't think the front roll center is adjustable on the Mugen... and that is unfortunate. If it is, go to the highest hole... HOWEVER, if it isn't, you could potentially modify it to raise the front roll center- you'd need to drill another hole in the shock tower where the upper arms attach, higher than the existing one. Leave about 1 hole diameter between... and space the rear plastic piece that holds the bolt up by an equal amount. (changing my Jammin all the way to the upper hole on the upper camber link made a HUGE difference in steering!) I'm not positive of course, because I didn't know enough when I had my Mugen buggy to try this... but I honestly think that would make a dramatic difference in handling on the Mugen.

6) And the biggest single change you can make to that truck's handling, so pay attention: Use the MTR wheels you have currently for a car stand, and put LPR's on it. The MTR wheels with the taller sidewall tires allow the tires to flex WAY too much in a turn. It is a night and day difference.

7) One more thing that might help: More droop in the front, and less in the rear.
__________________
Brad "DOMIT" Smith - I'm not fast, but at least I wreck a lot.
Unsponsored, but I use/recommend: XRay XB9, Alpha A852, Dynamite 053, Airtronics M11, Hitec 5955TG & 7955TG, ABEC 35 clutch and chassis bearings, PTRCRacing shock and diff fluids, Ready Rollers ceramic engine bearings. ** Team Terribles Region 9 coordinator. ** JOIN TEAM TERRIBLES! All racers welcome! PM me for details.

Last edited by DOMIT; 03-13-2009 at 04:39 AM.
DOMIT is offline   Reply With Quote
Old 03-13-2009, 04:46 AM   #11
Tech Master
 
v1r killer's Avatar
 
Join Date: Jan 2007
Location: GOLD COAST, AUSTRALIA
Posts: 1,315
Trader Rating: 8 (100%+)
Default

i just traded my mugen mbx5t pro in cause it had bad turn in issues. i tried tunning it out but was unable to get rid of it and the only way i could do any thing was to adjust my driving style a little. a dab of the breaks entering the corner to get the back end moving ever so slighty followed by power on bring the nose around rather quick. i was running a os 21 v spec with 7/10/3 diff and strr bb with 38 front ang 35 rear.it is an awsome truck that does not break or wear and it still one of my favourite trucks.
__________________
Bruce ( JUICEY ) Airey
Tekno EB48-3, RX8.2 1900, NB48-3, Nova P5
Coast2Coastrc, SMC batteries, FTW Bodies; Tekin; AKA Tyres
v1r killer is offline   Reply With Quote
Old 03-13-2009, 04:58 PM   #12
Tech Adept
 
Join Date: Feb 2009
Posts: 121
Default MBX5T

DIFFS 7 10 1 Move top arms forward shocks all the way out at bottem all the in top i use kyosho bb 600w all round
the daddy is offline   Reply With Quote
Old 03-13-2009, 05:01 PM   #13
Tech Adept
 
Join Date: Feb 2009
Posts: 121
Default mbx5t

crimefighters lprs
the daddy is offline   Reply With Quote
Reply



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 09:55 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net