Toyota Yaris Forums - Ultimate Yaris Enthusiast Site
 

 


 
Go Back   Toyota Yaris Forums - Ultimate Yaris Enthusiast Site > Technical Forums > Wheels, Tires and Suspension Forum sponsored by The Tire Rack
 

Reply
 
Thread Tools Display Modes
Old 11-20-2009, 03:37 PM   #37
Loren
What?
 
Loren's Avatar
 
Drives: 2007 Yaris LB
Join Date: Nov 2008
Location: Safety Harbor, FL
Posts: 1,006
I'm gonna bet the primary effect in play here is the "toe curve" of the rear suspension. It's designed to be slightly toed in at the factory ride height, and as the suspension compresses in a turn, it toes in a little more for stability. This effect is all built into the rear axle assembly and the angles at which it rotates. So, by changing to the upper holes on a lowered car, you're effectively putting things back into the alignment they were designed for.

To verify this, someone should carefully measure their rear toe before and after making this change. If I'm right, you should see less static toe out after than before.
__________________

----------------------- Loren@InvisibleSun.org -----------------------
Loren is offline   Reply With Quote
Old 11-22-2009, 10:04 AM   #38
detroiter
 
detroiter's Avatar
 
Drives: 2008 Polar White LB Auto
Join Date: Oct 2008
Location: Metro Detroit
Posts: 1,238
Thanks for the finding! I'm curious though, what exactly is the benefit/gain of doing this procedure? I'm not quite sure I completely get what the end result is. Also, any negatives to it?
detroiter is offline   Reply With Quote
Old 11-22-2009, 11:53 AM   #39
kngrsll
Apexing Egg!!
 
kngrsll's Avatar
 
Drives: 07 Toyota Yaris white hatch
Join Date: Oct 2006
Location: Spartanburg, SC
Posts: 872
Send a message via AIM to kngrsll
Quote:
Originally Posted by Loren View Post
I'm gonna bet the primary effect in play here is the "toe curve" of the rear suspension. It's designed to be slightly toed in at the factory ride height, and as the suspension compresses in a turn, it toes in a little more for stability. This effect is all built into the rear axle assembly and the angles at which it rotates. So, by changing to the upper holes on a lowered car, you're effectively putting things back into the alignment they were designed for.

To verify this, someone should carefully measure their rear toe before and after making this change. If I'm right, you should see less static toe out after than before.
hmm,i need an alignment, perhaps i will try this...
__________________
HighTach Motorsports
2007 Toyota Yaris-ARGH!!
Mods: Tokico HTS, 6.6 kg F, 6.1 kg R custom springs, 23 mm RSB, 2-way TRD LSD, 15x7 +25 Team Dynamic wheels, 195/55/15 Dunlop Star Specs, Cobra Suzuka S
kngrsll is offline   Reply With Quote
Old 11-22-2009, 01:05 PM   #40
YarisSedan
 
YarisSedan's Avatar
 
Drives: 08 Yaris Sedan
Join Date: Oct 2008
Location: California - Bay Area
Posts: 2,773
Send a message via AIM to YarisSedan
Quote:
Originally Posted by Loren View Post
I'm gonna bet the primary effect in play here is the "toe curve" of the rear suspension. It's designed to be slightly toed in at the factory ride height, and as the suspension compresses in a turn, it toes in a little more for stability. This effect is all built into the rear axle assembly and the angles at which it rotates. So, by changing to the upper holes on a lowered car, you're effectively putting things back into the alignment they were designed for.

To verify this, someone should carefully measure their rear toe before and after making this change. If I'm right, you should see less static toe out after than before.
Hmmm i just had a alignment done few weeks ago. When i get a chance ill do this and get a second alignment done and see the difference and post results for you guys Ill also take a few pics more pics if no one has done it by then to make a little more detailed DIY for those who dont know exactly what we are talking about yet. GOOD FIND!

Last edited by YarisSedan; 11-22-2009 at 01:22 PM.
YarisSedan is offline   Reply With Quote
Old 11-23-2009, 05:32 PM   #41
detroiter
 
detroiter's Avatar
 
Drives: 2008 Polar White LB Auto
Join Date: Oct 2008
Location: Metro Detroit
Posts: 1,238
Thanks for the finding! I'm curious though, what exactly is the benefit/gain of doing this procedure? I'm not quite sure I completely get what the end result is. Also, any negatives to it?
detroiter is offline   Reply With Quote
Old 11-23-2009, 05:39 PM   #42
cali yaris
ULTIMATE
 
cali yaris's Avatar
 
Drives: 07 Yaris Turbo
Join Date: May 2007
Location: Canoga Park, CA
Posts: 14,859
Send a message via AIM to cali yaris
Quote:
I did it. Super easy. I put the car on jack stands at the rear jack points, used floor jacks to support the weight of the axle and keep the springs from fighting me, and removed the rear wheels, both for weight reduction and access.
Exactly how I did it also. Alignment next week, will compare to the last one I did.
__________________
Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.
cali yaris is offline   Reply With Quote
Old 11-23-2009, 06:35 PM   #43
Indianspringsaz
 
Drives: 07 Bitchin Blue HB
Join Date: Jul 2007
Location: AZ
Posts: 106
Getting ready to put some DF springs on. Should I move them to the upper hole during the install? Where do you guys trust to do the alignments? I hate going to shops and have to explain to them how to do their job.
__________________
07 Yaris HB
07 Road King
06 Superduty CC
05 Scion TC
01 30' Sleekcraft HP500EFI
Your Local Amsoil Dealer
Indianspringsaz is offline   Reply With Quote
Old 11-23-2009, 07:09 PM   #44
YarisSedan
 
YarisSedan's Avatar
 
Drives: 08 Yaris Sedan
Join Date: Oct 2008
Location: California - Bay Area
Posts: 2,773
Send a message via AIM to YarisSedan
Quote:
Originally Posted by cali yaris View Post
Exactly how I did it also. Alignment next week, will compare to the last one I did.
Did you hand torque it down or just hit it with a breaker bar as hard as you could? I am guessing it should be torqued to about 145ft lbs. And maybe some threadlocker for some extra insurance. I am going to do this at home on my driveway hopefully tonight. Usually i hit everything down with a impact gun but by hand i like to get torque specs to be on the safe side.
YarisSedan is offline   Reply With Quote
Old 11-23-2009, 07:22 PM   #45
Tamago
Start another Oil Thread!
 
Tamago's Avatar
 
Drives: ZZW30
Join Date: Dec 2006
Location: South FL
Posts: 4,890
Send a message via AIM to Tamago Send a message via Yahoo to Tamago
that's some serious torque there ...
__________________
Quote:
Originally Posted by xnamerxx
I hate people like you (xbgod) because your the reason I don't come to this board. You spout nonsense and lies and people who don't know any better hold you in high regards because they can't tell the wheat from the chaff.
you nailed it sir.
Tamago is offline   Reply With Quote
Old 11-23-2009, 08:43 PM   #46
Loren
What?
 
Loren's Avatar
 
Drives: 2007 Yaris LB
Join Date: Nov 2008
Location: Safety Harbor, FL
Posts: 1,006
Those pivot bolts don't need to be super-tight. The factory manual is available online, though... look it up!
__________________

----------------------- Loren@InvisibleSun.org -----------------------
Loren is offline   Reply With Quote
Old 11-23-2009, 09:47 PM   #47
detroiter
 
detroiter's Avatar
 
Drives: 2008 Polar White LB Auto
Join Date: Oct 2008
Location: Metro Detroit
Posts: 1,238
Is there some reason my question has been skipped over twice so far? Just curious.
detroiter is offline   Reply With Quote
Old 11-23-2009, 11:42 PM   #48
mojoyaris
Ecurie Snoopy Lives
 
mojoyaris's Avatar
 
Drives: Jojo
Join Date: Mar 2007
Location: Vancouver
Posts: 447
If you read above Lorens Posts

"I'm gonna bet the primary effect in play here is the "toe curve" of the rear suspension. It's designed to be slightly toed in at the factory ride height, and as the suspension compresses in a turn, it toes in a little more for stability. This effect is all built into the rear axle assembly and the angles at which it rotates. So, by changing to the upper holes on a lowered car, you're effectively putting things back into the alignment they were designed for."

And on the previous pages you'll get an idea of how it adjusts the suspension geometry

When you lower the suspension in the front you can get bump steer. There are devices to install in the front to adjust and compensate for this. This is something akin to that but in the rear suspension where you level out the torsion beam and realign the toe.

I guess an illustration would be the best way to describe this.
__________________
Sponsors and Organizations:
Toyota Rally Canada
Yokohama Tire Canada
Western Canada Rally Association
Ecurie (Team) Snoopy Canada, racing since 1966
mojoyaris is offline   Reply With Quote
Old 11-24-2009, 01:43 AM   #49
Loren
What?
 
Loren's Avatar
 
Drives: 2007 Yaris LB
Join Date: Nov 2008
Location: Safety Harbor, FL
Posts: 1,006
Quote:
Originally Posted by detroiter View Post
Is there some reason my question has been skipped over twice so far? Just curious.
Um, yeah. I may not have addressed you by name, but your question has been answered. Read.
__________________

----------------------- Loren@InvisibleSun.org -----------------------
Loren is offline   Reply With Quote
Old 11-24-2009, 02:32 AM   #50
YarisSedan
 
YarisSedan's Avatar
 
Drives: 08 Yaris Sedan
Join Date: Oct 2008
Location: California - Bay Area
Posts: 2,773
Send a message via AIM to YarisSedan
Quote:
Originally Posted by Loren View Post
Those pivot bolts don't need to be super-tight. The factory manual is available online, though... look it up!
I took your advice and looked it up. For those who are interested the factory spec is exactly 67 ft lbs.
YarisSedan is offline   Reply With Quote
Old 11-24-2009, 02:36 AM   #51
Kaotic Lazagna
 
Kaotic Lazagna's Avatar
 
Drives: '14 GT86, '08 Vitz
Join Date: Dec 2006
Location: Central Valley, CA
Posts: 9,873
Dang, my crappy torque wrench doesn't go that high =(
Kaotic Lazagna is offline   Reply With Quote
Old 11-24-2009, 03:04 AM   #52
Tamago
Start another Oil Thread!
 
Tamago's Avatar
 
Drives: ZZW30
Join Date: Dec 2006
Location: South FL
Posts: 4,890
Send a message via AIM to Tamago Send a message via Yahoo to Tamago
Quote:
Originally Posted by Kaotic Lazagna View Post
Dang, my crappy torque wrench doesn't go that high =(
certainly does not need to. i removed my rear axle over 5 years ago and never used a torque wrench to re-install it. "tight" worked just fine.
__________________
Quote:
Originally Posted by xnamerxx
I hate people like you (xbgod) because your the reason I don't come to this board. You spout nonsense and lies and people who don't know any better hold you in high regards because they can't tell the wheat from the chaff.
you nailed it sir.
Tamago is offline   Reply With Quote
Old 11-24-2009, 03:17 AM   #53
ddongbap
Banned
 
Drives: yw calls me douche and racist.
Join Date: Aug 2007
Location: hay
Posts: 2,183
So whats the end end of this?

Raise the bolt location then X happens?

Idk if people think a stable rear is better for handling?

I'd assume that having a happier rear end, or a rear end with a TOE OUT setting is better for turning? That would also make the rear end feel like its gonna get in front of you, right? Ahh, Loren, help me out.
ddongbap is offline   Reply With Quote
Old 11-24-2009, 03:35 AM   #54
advocate
 
Drives: car
Join Date: Oct 2008
Location: location
Posts: 1,033
I would assume then this is for the Japanese following of the car for when it's lowered and being raced? Seems easy enough for me... Drill an extra hole for people who want to race it and leave one for the stock height...

Too bad it took us forever to find it =(
advocate is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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
NEWS: TOYOTA REVEALS ALL-NEW YARIS SEDAN AT 2006 LOS ANGELES AUTO SHOW VitzBoy General Yaris / Vitz Discussion 7 09-20-2023 07:50 AM
When will the Yaris hit the showrooms at dealers? Petrolhead New YARIS Purchase Forum 181 11-28-2011 07:03 AM
Any Yaris hatch rear suspension tweeks? woof Wheels, Tires and Suspension Forum sponsored by The Tire Rack 26 12-05-2009 06:04 PM
Hyperco 5.5" single pigtail rear spring test kngrsll Wheels, Tires and Suspension Forum sponsored by The Tire Rack 33 06-15-2009 10:11 AM


All times are GMT -4. The time now is 07:21 AM.




YarisWorld
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.