Welcome to the North American Subaru Impreza Owners Club Thursday September 18, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Click here to visit TireRack
Brakes & Suspension Forum sponsored by The Tire Rack

Losing traction? Need new tires?
Click here to visit the NASIOC Upgrade Garage...
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Brakes, Steering & Suspension

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 09-14-2004, 09:15 PM   #1
mrmcderm
Scooby Newbie
 
Member#: 25294
Join Date: Sep 2002
Location: Downers
Vehicle:
2003 LR Infiniti G35
WRB WRX Wagon (Sold)

Unhappy Loose steering at high speed in a wagon

Does anyone have an experience with, or insight into why my wagon steering get sloppy, or loose at higher speeds? I used to notice it about 85mph, then it started happening at 80. Coming home from work tonight it started at around 75mph.

It feels like the front end lightens up...or maybe like the steering box is getting 'overboosted'. All of the sudden the steering feel gets really light and it feels like it wouldn't take much to really whip it into a spin.

The feeling is not linear at all. 70mph feels like 30mph, 75mph feels like my mom's minivan.

I've seen one other post about this via search, but the guy posted in the wrong forum so there were no responses.

If anyone has any ideas, please let me know. And no, this is not the 'memory steer' problem...I have that problem also, and haven't upgraded the steering bushings yet. And even when I do, I really don't think they are going to solve this problem.

TIA,
M
* Registered users of the site do not see these ads.
mrmcderm is offline   Reply With Quote
Old 09-14-2004, 10:23 PM   #2
Integra96
Scooby Specialist
 
Member#: 64196
Join Date: Jun 2004
Chapter/Region: RMIC
Vehicle:
2010 Family Sedan

Default

Well, I know that the stock crappy alignment specs on some cars can make the steering feel funky like that. Maybe get a nicer performance alignment to see if it helps. Also, I noticed that having a bigger rear sway bar helped "stabilize" the steering feel at higher speeds on the highway.
Integra96 is offline   Reply With Quote
Old 09-14-2004, 11:06 PM   #3
majmun
Scooby Specialist
 
Member#: 18298
Join Date: May 2002
Chapter/Region: SWIC
Vehicle:
2004 STi

Default

Have you checked your tire pressures lately?
majmun is offline   Reply With Quote
Old 09-15-2004, 11:07 AM   #4
linsavy
Scooby Specialist
 
Member#: 11620
Join Date: Oct 2001
Location: Ontario
Vehicle:
1997 GF4-STiV3 clone

Default

Also you could swap the steering rack bushings for the Whitelines or Noltec and add an ALK to increase castor which gives a more solid on-centre feel at speed.
linsavy is offline   Reply With Quote
Old 09-15-2004, 02:27 PM   #5
blksubie
Scooby Specialist
 
Member#: 55177
Join Date: Feb 2004
Chapter/Region: MAIC
Location: Chesapeake, VA
Vehicle:
2003 IS300
Obsidian Black

Default

what do the tire look like, i had the same problem and then i looked at my tire and saw I had wire showing on the inside of my tires.....very bad
blksubie is offline   Reply With Quote
Old 09-15-2004, 02:55 PM   #6
mrmcderm
Scooby Newbie
 
Member#: 25294
Join Date: Sep 2002
Location: Downers
Vehicle:
2003 LR Infiniti G35
WRB WRX Wagon (Sold)

Default

No, I haven't checked my pressures in a couple of weeks, though I tend to run higher pressures...

And the insides of my tires are pretty worn. All 4 of my tires are cupped from a poor alignment job followed by months of my wife driving it while under inflated.

I will check my pressures tonight...

But do you think the tread wear could cause that effect?
mrmcderm is offline   Reply With Quote
Old 09-15-2004, 03:16 PM   #7
BIGSKYWRX
Scooby Guru
 
Member#: 7958
Join Date: Jul 2001
Location: Plains of Eastern Montana
Vehicle:
09 GH B+

Default

Tread wear or a poor alignment (could be linked). Toe out (excessive) will cause pretty poor performance at speed- even excessive toe in can too.

If the tread wear is that poor- I'd think about retiring them, if not an alignment (w/ a shop that will give you before/after printouts).

Big Sky
BIGSKYWRX is offline   Reply With Quote
Old 09-15-2004, 06:53 PM   #8
newscooby
Scooby Specialist
 
Member#: 995
Join Date: Feb 2000
Chapter/Region: South East
Location: In an airplane, such is life..
Vehicle:
2000 MkIV GTi&23 LSV
Red cars PWN me

Default

In addition to the other replies...I noticed, on my stock suspension, the same characteristics you've described when I got to 100.

Suspension mods fixed that. But I'd definitely look into alignment and tires first.
newscooby is offline   Reply With Quote
Old 09-15-2004, 08:02 PM   #9
Arnie
Scooby Guru
 
Member#: 1725
Join Date: Jun 2000
Chapter/Region: International
Location: Germany
Vehicle:
99 Subaru Impreza
GF silver

Default

At 100, aerodynamics are definitely playing a roll and lift starts to rear its ugly head, no pun intended.
Arnie is offline   Reply With Quote
Old 09-15-2004, 11:37 PM   #10
pimpUall
Scooby Newbie
 
Member#: 55424
Join Date: Feb 2004
Location: Racer X Engineering
Vehicle:
2005 380hp LGT Wagon
Blue

Default

It's your tires. I have an '04 wagon with 17 x 7.5 rota tarmacs w/ 225/45/17. I also have front and rear strut braces and a 4 point lower control arm brace. The rest is bone stock. When I have done 110+mph run it's very steady. No float or drama. If you have stock tires up the tires about 4 psi.
pimpUall is offline   Reply With Quote
Old 09-16-2004, 07:03 PM   #11
2Stroke
Scooby Specialist
 
Member#: 36712
Join Date: May 2003
Location: RHE, SoCal
Vehicle:
2003 WRX Wagon
WRB

Default

I have the same feeling with my wagon, but in my case, I'd say it changes with speed as something like a parabolic curve, as opposed to being linear, but its predictable. When cornering at speeds above ~75 mph, and especially when cornering uphill and under acceleration, it feels to me like the front end is lifting more than usual. The front end feels light, and steering response is slower. I have to turn in sooner and farther to get the car thru a given corner.

I attribute it mostly to rearward weight transfer due to aero lift, compounded by the lift due to acceleration. Note that the acceleration lift further raises the front of the car, which in turn increases the aero lift/weight transer due to higher ""attack angle" (because I can't think of a better term for the angle of the car relative to the direction of airflow). I'm also thinking that the AWD system is contributing some gyro effect to the situation that is causing the car not to turn as well as it would in a 2-wheel drive car, but I don't have the expertise to quantify or even characterize that.

BTW, my suspension is stock, but I have good 215/45-17 tires on +52 offset rims, and my alignment is set at -1.0 camber, zero toe.

Sorry I don't have any specific answers, but suspension upgrades to keep the nose down should be the ticket here. I'll do some of that as soon as I finish thrashing the stock suspension.
2Stroke is offline   Reply With Quote
Old 09-16-2004, 07:15 PM   #12
2Stroke
Scooby Specialist
 
Member#: 36712
Join Date: May 2003
Location: RHE, SoCal
Vehicle:
2003 WRX Wagon
WRB

Default

Quote:
Originally Posted by pimpUall
I also have front and rear strut braces and a 4 point lower control arm brace.
Any chance that you could write up a short (or otherwise) review of the lower control arm brace? Maybe in the "car parts" forum? /end hijack.
2Stroke is offline   Reply With Quote
Old 09-17-2004, 11:37 AM   #13
pimpUall
Scooby Newbie
 
Member#: 55424
Join Date: Feb 2004
Location: Racer X Engineering
Vehicle:
2005 380hp LGT Wagon
Blue

Default

To be honest, I put the top front and rear braces on about month after I got my car. Then a month I installed the lower brace. Then a month later I installed a set of rota 17 x 7.5 with 225/45/17. With the first braces it felt alittle stiffer. With the lower control brace the car felt even stiffer and would responde quicker and was more stable in turns. With the new rims and tires it's even more stable at hi speeds(a few 110+ mph) and really sticks in corners. I got all the bracing to keep the car stiff as it gets older. I plan on keeping my car for at least 5 yr and I want it to be in the future as it is now.
pimpUall is offline   Reply With Quote
Old 09-24-2004, 03:16 PM   #14
mrmcderm
Scooby Newbie
 
Member#: 25294
Join Date: Sep 2002
Location: Downers
Vehicle:
2003 LR Infiniti G35
WRB WRX Wagon (Sold)

Default

majmun, the tire pressures were the problem! They were back down to the stock values. I ran them back up to 36 front, 34 rear and the issue went away.

me thinks its time for new tires.
mrmcderm 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
Steering Wheel jerks at high speed in the rain Imp06 Newbies & FAQs 11 07-29-2009 11:49 PM
Strange noise at high speed in '06 STI scrawshaw Tire & Wheel 1 12-24-2006 01:13 PM
Loose Steering at high speed Husky07 Brakes, Steering & Suspension 12 12-29-2005 01:52 PM
Is the speed-proportional steering wheel supposed to tighten up at high speed? njchen24 Legacy Forum 3 11-08-2005 07:20 PM
('93-'01) Steering wheel is loose at high speeds HydeX Impreza Forum 16 10-15-2001 09:58 PM


All times are GMT -4. The time now is 07:54 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.