Mini-Z, Kyosho Mini-Z Racer, MR-03, MR-02, MA-010, Forums, News, Pictures, Parts, and Shop - Mini-ZRacer.com
Forums, Mini-Z, MiniZ, Kyosho Mini-Z, Kyosho MiniZ, Kyosho Mini-Z Racer
Mini-Z Hop-Ups, Mini-Z Parts, MiniZ Hop-Ups, MiniZ Parts, Kyosho Mini-Z Hop-Ups, Kyosho Mini-Z Parts, Kyosho MiniZ Hop-Ups, Kyosho MiniZ Parts, Kyosho Mini-Z Racer Hop-Ups, Racer Kyosho Mini-Z Parts
Old 2004.06.11, 10:14 PM   #1
bbeattie
Registered User
 
Join Date: Jan 2004
Posts: 31
Turns left faster than right

My 02 MM enzo wants to turn much faster to the left than right. It may be better though to say it spins out more to the left than right. I can control the left spin outs pretty well, so I don't flip all the way around. Right turns at high speed though make for very, very wide turns. It's probably safe to say turning left understeers, turning right oversteers. I'm running a kyosho diff. If it's loose, or tight it seems to be the same. The only exception is if it is loose enough, the car doesn't spin out, so both right and left turns are about the same, but lefts are still slightly sharper.

Is this normal? Should the diff be set tight, loose, in the middle?

The difference at a fairly good speed is about a 3foot radius vs a 7 foot radius.

I'm running 8 degree GPM V groove, the front tires though are totalled after just 2 hours of testing and trying different configs (The tires got hot and melted so they're quite bumpy and the V-groove tread is barely noticable only in some spots). Running 15db, 30dg, and 55dg tires still give the same behaviour, but the harder the tire the difference isn't as much.

If this is normal, do most people prefer to leave a lose diff so stearing radius is about the same left vs right, or tight so you turn left a lot faster than right?

--Brandon
bbeattie is offline   Reply With Quote
Old 2004.06.11, 11:26 PM   #2
acyf
Registered User
 
Join Date: May 2004
Posts: 14
Check on the H-Plate to see the alignment is in the centre, that means the mount did not shift to left or right.

Or may be your tire is hit the body when turning.

Last edited by acyf; 2004.06.11 at 11:58 PM.
acyf is offline   Reply With Quote
Old 2004.06.11, 11:46 PM   #3
TNB
Pet Human
 
TNB's Avatar
 
Join Date: Oct 2003
Posts: 3,873
I go through a set of 20s in about 1 hour of "hard" run time on an RCP track--changing to fresh batteries every 15 minutes. During that time I also need to swap the front tires or change running directions since the right front tire tends to wear more than the other side. I can also tell when the tire is wearing because the car will pull to one side. I'll also end up increasing the dual rate as the tires wear. If I use 30Fs, I can get some extra track time in on a set--harder tire.
__________________
Gallery TNB
TNB is offline   Reply With Quote
Old 2004.06.22, 04:32 PM   #4
Aaronnn
(TITANIUM)
 
Join Date: Nov 2003
Posts: 452
Quote:
Originally Posted by bbeattie

Is this normal? Should the diff be set tight, loose, in the middle?



--Brandon
Basically,
your diff should be set according to spinout....never to loose or damage will acure..if you have great traction and have no spin outs...set diff at a lock position....spinning out ? then loosen up...

i think you have other issues other than diff settings....maybe suspension or tire rub....
Aaronnn is offline   Reply With Quote
Old 2004.06.22, 04:37 PM   #5
Aaronnn
(TITANIUM)
 
Join Date: Nov 2003
Posts: 452
Quote:
Originally Posted by bbeattie
The difference at a fairly good speed is about a 3foot radius vs a 7 foot radius.



--Brandon
i am guessing front suspension problem or king pin/knuckle lock-up....
Aaronnn is offline   Reply With Quote
Old 2004.06.23, 01:56 PM   #6
bbeattie
Registered User
 
Join Date: Jan 2004
Posts: 31
Quote:
Originally Posted by Aaronnn
Basically,
your diff should be set according to spinout....never to loose or damage will acure..if you have great traction and have no spin outs...set diff at a lock position....spinning out ? then loosen up...

i think you have other issues other than diff settings....maybe suspension or tire rub....
What type of damage can occur? Just curious, I've toyed with it quite a bit. I am looking at getting a new diff as I bent the axel on my kyosho ball bearing. :-) It was clocked at 32MPH (Xspeed and 12 tooth gpm pinion gear) shortly seconds before I hit the break to slow down, it spun out and caught the right tire on a 2x4 in the warehouse. (But the carbon fiber h-plate and gpm sliding rear motor pod are 100% good still) Straightening the diff didn't fix it well enough. There's still too much wheel hop at high speed even with a near straighened axel.

Any comments on the GPM ball diff? does 12 ball bearings really make it smoother?

--Brandon
bbeattie is offline   Reply With Quote
Old 2004.06.23, 06:29 PM   #7
Aaronnn
(TITANIUM)
 
Join Date: Nov 2003
Posts: 452
if your diff is too loose...it can get too hot....i have never seen one damaged...but i imagine it can warp or melt the spur...maybe the rings..or balls...
give it a try and let me know what happens.....

p.s. i was thinking also...that you will need to verify that your servo assembly is working correctly...i.e. turns both ways at the same rate.....no binding, etc....
Aaronnn is offline   Reply With Quote
Old 2004.06.23, 06:31 PM   #8
Aaronnn
(TITANIUM)
 
Join Date: Nov 2003
Posts: 452
Quote:
Originally Posted by bbeattie
Any comments on the GPM ball diff? does 12 ball bearings really make it smoother?

--Brandon
no comment.....

p.s.s. stop hitting 2x4's would ya!!!
Aaronnn is offline   Reply With Quote
Old 2004.07.07, 10:32 PM   #9
bENZinO
Registered User
 
bENZinO's Avatar
 
Join Date: Jul 2004
Location: chattanooga, tn
Posts: 412
Quote:
Originally Posted by Aaronnn
p.s. i was thinking also...that you will need to verify that your servo assembly is working correctly...i.e. turns both ways at the same rate.....no binding, etc....
i too have the 02 ENZO and have niticed the same, aaronnn sounds like hes got it because when i look at my wheels/tires from the bottom, its almost like theres a small range of turn where it doesnt steer, the as you keep turning (SLOWLY!) you'll see the wheels/tires jump a little to the left to get to where you have turned to.
i hope that makes sense. i'll check back and let u know if i can correct (will ask local "club" members tomorrow) and if youve figured it out, let me know how u did it.

-thanks and happy motoring
bENZinO is offline   Reply With Quote
Old 2005.06.20, 02:42 PM   #10
bbeattie
Registered User
 
Join Date: Jan 2004
Posts: 31
It's the body?!

You're not going to believe this, but I've found the problem. After over a year and countless hours of tweaking, it turns out it is the body. I changed bodies of my car with a "less damaged" red enzo (Identical). The spinouts vanished. I put my body back on, they came back, tried other bodies, the problem went away. I know this sounds a little out there, but it's true. If anyone else is having major spinout problems, and the car wants to turn left faster than right, try another body... :-/
bbeattie is offline   Reply With Quote
Old 2005.06.20, 02:44 PM   #11
bbeattie
Registered User
 
Join Date: Jan 2004
Posts: 31
Quote:
Originally Posted by bbeattie
You're not going to believe this, but I've found the problem. After over a year and countless hours of tweaking, it turns out it is the body. I changed bodies of my car with a "less damaged" red enzo (Identical). The spinouts vanished. I put my body back on, they came back, tried other bodies, the problem went away. I know this sounds a little out there, but it's true. If anyone else is having major spinout problems, and the car wants to turn left faster than right, try another body... :-/
I should note, I tried different bearings, tried stock diff, changed pinions, front springs, rear spring tension.. nothing helped get rid of the spinouts except the body change.
bbeattie is offline   Reply With Quote
Old 2005.06.20, 05:16 PM   #12
ruf
4play
 
ruf's Avatar
 
Join Date: Nov 2001
Location: Reflex Racing, everywhere
Posts: 2,602
Adjust the rear tweak. Very few h-plates are actually perfectly straight. Hold the car with both hands with the rear facing you. Push the left tire with your thumb and then the right tire. Go back and forth. You will see the rear suspension "recover". If it recovers down more to one side than the other, put a thin shim inbetween the h-plate and the motor mount on that side where the mounting screw goes. This will space the motor mount up on that side and SHOULD balance the car. I use the 0.3mm Kyosho shims. Just make sure it's ultra thin or it will tweak the car the other way.

Also make sure that nothing is binding or rubbing on the body like tires, motor wires, etc.
__________________
Joe Chen
www.reflexracing.net
Houston, TX
Mini-Z World Champions!
Reflex Racing Blog
Reflex Racing YouTube
ruf is offline   Reply With Quote
Old 2005.06.20, 06:25 PM   #13
bbeattie
Registered User
 
Join Date: Jan 2004
Posts: 31
Quote:
Originally Posted by ruf
Adjust the rear tweak. Very few h-plates are actually perfectly straight. Hold the car with both hands with the rear facing you. Push the left tire with your thumb and then the right tire. Go back and forth. You will see the rear suspension "recover". If it recovers down more to one side than the other, put a thin shim inbetween the h-plate and the motor mount on that side where the mounting screw goes. This will space the motor mount up on that side and SHOULD balance the car. I use the 0.3mm Kyosho shims. Just make sure it's ultra thin or it will tweak the car the other way.

Also make sure that nothing is binding or rubbing on the body like tires, motor wires, etc.
Trust me, I've checked that many times.. this post was also stated elsewhere if I remember correctly..

Also, the bodies never touch the rear wheels or anything else (or never should atleast), and although this could be a problem, it wasn't for me.
bbeattie is offline   Reply With Quote
Old 2005.06.21, 08:34 PM   #14
davkin
Master of My Mini Domain
 
davkin's Avatar
 
Join Date: Oct 2003
Location: Utah
Posts: 1,241
Brandon,

Check the body and see if it's tweaked, especially the very front where the front clip goes in. I'm thinking it may be possible that a tweaked body could tweak the chassis when mounted.

David
__________________
Salt Lake Mini-Z
davkin is offline   Reply With Quote
Old 2005.06.22, 12:47 PM   #15
Pippoe
Registered User
 
Pippoe's Avatar
 
Join Date: Oct 2003
Posts: 41
different turning radiuses are normal

Quote:
Originally Posted by Aaronnn
if your diff is too loose...it can get too hot....i have never seen one damaged...but i imagine it can warp or melt the spur...maybe the rings..or balls...
Ahm.. if you keep the differential at a too loose setting (that is, if the diff can slip quite a lot) you'll simply wear out the metal balls contained inside very quickly. If the balls get more and more out of shape (due to wear), the dif will become uneffective..

...concerning different turning radiuses: Isn't that normal? How does the car behave on acceleration? Will it go straight or will it drift to one side?
The force introduced to the rear axle by the motor isn't simmetrical (because it's introduced at the right side wheel), therefore -depending on the engine you use- you will notice a more or less strong momentum when steering under load (or accelerating heavily).. you can eliminate most of the momentum with diff setting and traction (good tires) but imho you can't get rid of the problem.

Cheers

Pippoe
Pippoe is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Turning radius better on left turns. wsaenotsock Mini-Z AWD MA-010, MA-015 16 2007.04.28 11:01 PM
Turns Sharper to the Right than the left. mike honcho Beginner Questions 5 2007.04.28 10:54 AM
Only Turns Left... What to do??? C_Rus Beginner Questions 7 2007.04.07 02:16 AM
Handling problems rmelancon Setups 24 2003.02.12 11:53 PM
Left vs Right hand turns Scoobaru Parts and Hop-ups 15 2002.03.12 09:20 AM


All times are GMT -5. The time now is 08:40 AM.


Powered by vBulletin® Version 3.8.3
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Copyright 2011 Mini-ZRacer.com
Mini Inferno Sale - Up to $85 Instant Savings!
Micro-T Hop-Ups
RC18R, M18, Micro RS4, Mini-LST, TamTech-Gear, Minizilla, RC18T, RC18B, RC18MT
shop.tinyrc.com Products

more»
Tiny RC Community News
[03/22/17] MZR was on vacation, didn't... : All kidding aside, the host experienced a bit of a server meltdown last week and efforts to restore the site to a new server took longer than anticipated. The current server is temporary until - more»
[11/25/15] Did You Hear? Our Black... : Hey Racers,
We're getting started a bit early with our Black Friday sale this year.  Generally we're not supporters of retailers opening early on Thanksgiving, but in our case, we're - more»
[06/30/15] shop.tinyrc.com: Have You... : Hey All! Just a quick reminder to everyone that we post all of our shop.tinyrc.com Newletters here on the MZR Forum. If for some reason you miss them in your email inbox, you can always see the - more»
Mini-Z, Mini-Z Racer, MR-02, MA-010
M18, M18T, RC18T, Mini-LST, Mini-T, Micro RS4, XRay, 1/18, 18th scale
XMODS, XMOD, Micro Flight, ZipZaps, ZipZaps SE, Bit Char-G, MicroSizers, TTTT, Plantraco Desktop Rover, SuperSlicks, Digi Q
Mini Inferno, Mini Inferno ST, half EIGHT, 1/16, 16th scale
Epoch, Indoor Racer, 1/43, 43rd scale
E-Savage, eSavage, eZilla, e-Zilla, HPI
Robots, Bots, Bipeds, Wheeled, Manoi, Roomba, NXT, Lego, Hacking
Crawling, Crawlers, Micro, RC, Losi Mini-Rock Crawler, Duratrax Cliff Climber
Kyosho Minium, Caliber 120, Minium Forums
Mini-Z Hop-Ups, Mini-Z Parts, Mini Inferno Hop-Ups, Mini Inferno Parts, M18 Hop-Ups, M18 Parts