Can I get bumpsteer removal at TSL?
07 January 2002, 04:59 PM
#32
Scooby Regular
Join Date: Sep 2000
Location: London
Posts: 7,039
Likes: 0
Received 0 Likes
on
0 Posts
NBW,
Jza's got an MY01. On the MY00 (which I notice you've got), the Eibachs improve the handling by quite a bit (more resistance to roll/pitching, better poise) whilst barely making the ride any harder.
Matt
Jza's got an MY01. On the MY00 (which I notice you've got), the Eibachs improve the handling by quite a bit (more resistance to roll/pitching, better poise) whilst barely making the ride any harder.
Matt
09 January 2002, 04:47 PM
#33
Scooby Regular
Join Date: Feb 2001
Posts: 2,959
Likes: 0
Received 0 Likes
on
0 Posts
Cheers Matt!
The rides harder - skips the cd's on rough roads. But hey - im hard me so the improved handling and more weighty feel to the steering makes up for it!!
Get the geometry set up properly - its an amazing difference. The car corners with hardly any body roll.
I really wonder why Subaru Uk didnt give the press cars fitted with eibachs (low cost mod) cause im sure they would have rated the car a lot higher!!!!
Best £ for £ mod so far.
Jza
The rides harder - skips the cd's on rough roads. But hey - im hard me so the improved handling and more weighty feel to the steering makes up for it!!
Get the geometry set up properly - its an amazing difference. The car corners with hardly any body roll.
I really wonder why Subaru Uk didnt give the press cars fitted with eibachs (low cost mod) cause im sure they would have rated the car a lot higher!!!!
Best £ for £ mod so far.
Jza
09 January 2002, 07:50 PM
#34
Moderator
Join Date: Dec 1998
Location: Staffs
Posts: 23,573
Likes: 0
Received 0 Likes
on
0 Posts
To answer part of your question: front camber is easily adjustable, rears are normally fixed.
From my thread http://www.scoobynet.co.uk/bbs/threa...threadid=63563, I'd got the idea that the rear camber can be changed.
10 January 2002, 08:15 AM
#35
Scooby Regular
Join Date: Sep 2000
Location: London
Posts: 7,039
Likes: 0
Received 0 Likes
on
0 Posts
Chris,
That thread talks about toe in as the likely cause - don't think it suggests that rear camber is adjustable? I'm pretty certain you can only adjust the rear camber if you get some adjustable bolts.....
Matt
That thread talks about toe in as the likely cause - don't think it suggests that rear camber is adjustable? I'm pretty certain you can only adjust the rear camber if you get some adjustable bolts.....
Matt
01 April 2002, 03:04 PM
#36
Scooby Regular
Thread Starter
Join Date: May 2001
Posts: 877
Likes: 0
Received 0 Likes
on
0 Posts
I have a '00 Impreza 5 door, and IMHO the handling is not the best, with understeer being the predominant characteristic.
I previously drove a 306GTi-6 and there is no question in my mind that this was the better handling car. It also had a better ride.
In terms of traction though, and cornering grip under power, the Impreza has it, as you would probably expect.
However, in my experience the Impreza's handling is very much affected by tyre choice, more so than any other car I have driven. Changing from the OEM Bridgestones to Toyos has been a revelation.
Also, from what I have read on here, the effect of 4 wheel alignment (with or without bumpsteer removal, he says, trying not to start another argument), is also apparently massive. I don't know whether this is more relevent to 4wd than 2wd, and a colleague who has a TT also reports a similiar enthusiasm on their forum for 4 wheel alignment.
Cheers
Tim
[Edited by NBW - 1/4/2002 4:06:32 PM]
I previously drove a 306GTi-6 and there is no question in my mind that this was the better handling car. It also had a better ride.
In terms of traction though, and cornering grip under power, the Impreza has it, as you would probably expect.
However, in my experience the Impreza's handling is very much affected by tyre choice, more so than any other car I have driven. Changing from the OEM Bridgestones to Toyos has been a revelation.
Also, from what I have read on here, the effect of 4 wheel alignment (with or without bumpsteer removal, he says, trying not to start another argument), is also apparently massive. I don't know whether this is more relevent to 4wd than 2wd, and a colleague who has a TT also reports a similiar enthusiasm on their forum for 4 wheel alignment.
Cheers
Tim
[Edited by NBW - 1/4/2002 4:06:32 PM]
10 December 2002, 01:29 PM
#37
Scooby Senior
Join Date: Jun 1999
Posts: 3,410
Likes: 0
Received 0 Likes
on
0 Posts
Trouser,
Bumpsteer is caused by the non parallel running of the steering tie bars and suspension lower arm... the triangle formed by this in the standard setup means that the steering angle changes as the wheel moves through its suspension travel. On standard cars, this relationship is engineered such that the wheel will steer outwards as the suspension compresses, thus inducing understeer.
The traditional way that everyone else uses to remove this "safety" feature is arrange for the the steering and lower arms to run as parallel to eachother as possible. This is most easily acheived on the impreza by adjusting the position of the rack using simple metal shims. All you would need to do this is a ramp, some tracking and/or alignement gear and some basic metalworking toolls to make the shims up with.
Its not rocket science or black magic, it's covered in a number of books, but it does require the relationship of the steering and suspension arms to be adjusted, which is not possible unless you move one in relation to the other.
Regards,
Moray
Bumpsteer is caused by the non parallel running of the steering tie bars and suspension lower arm... the triangle formed by this in the standard setup means that the steering angle changes as the wheel moves through its suspension travel. On standard cars, this relationship is engineered such that the wheel will steer outwards as the suspension compresses, thus inducing understeer.
The traditional way that everyone else uses to remove this "safety" feature is arrange for the the steering and lower arms to run as parallel to eachother as possible. This is most easily acheived on the impreza by adjusting the position of the rack using simple metal shims. All you would need to do this is a ramp, some tracking and/or alignement gear and some basic metalworking toolls to make the shims up with.
Its not rocket science or black magic, it's covered in a number of books, but it does require the relationship of the steering and suspension arms to be adjusted, which is not possible unless you move one in relation to the other.
Regards,
Moray
10 December 2002, 01:42 PM
#38
Scooby Senior
Join Date: Oct 2000
Location: Zurich, Switzerland
Posts: 3,105
Likes: 0
Received 0 Likes
on
0 Posts
Moray,
Did it take you a long time to write that reply;
Your post: posted Tuesday, December 10, 2002 13:29
Previous post: Thursday, January 10, 2002 08:15
Richard
PS: be careful about using too large a shim - the clamp must still grip the mounting rubber bushes sufficiently
Did it take you a long time to write that reply;
Your post: posted Tuesday, December 10, 2002 13:29
Previous post: Thursday, January 10, 2002 08:15
Richard
PS: be careful about using too large a shim - the clamp must still grip the mounting rubber bushes sufficiently
18 December 2002, 08:24 PM
#39
Scooby Regular
Join Date: Dec 2002
Posts: 206
Likes: 0
Received 0 Likes
on
0 Posts
My first look at this site.
Bumpsteer is quite simply the change in toe when suspension moves.
The amount of bump steer is quite minimal on a Sub anyway. To change the amount of bumpsteer without changing the rideheight, some amount of shimming or bending of steering arms will have to be done.
The increased grip you seem to be talking about will most likely be achieved by simple toe and camber changes. The Subaru suspension design ensures that you will feel a big difference between small toe changes. You only have to look at the steering axis inclination and castor angle to see why.
Bumpsteer is quite simply the change in toe when suspension moves.
The amount of bump steer is quite minimal on a Sub anyway. To change the amount of bumpsteer without changing the rideheight, some amount of shimming or bending of steering arms will have to be done.
The increased grip you seem to be talking about will most likely be achieved by simple toe and camber changes. The Subaru suspension design ensures that you will feel a big difference between small toe changes. You only have to look at the steering axis inclination and castor angle to see why.
19 December 2002, 06:41 PM
#40
Scooby Regular
Join Date: Sep 2000
Location: London
Posts: 7,039
Likes: 0
Received 0 Likes
on
0 Posts
So,
It sounds like you are agreeing then? If you have the old shape which has Bump Steer as standard, the small amount of toe out that happens when the suspension compresses is quite noticably felt on the road as understeer when driving the car? That's what you seem to be saying and from experience, I would agree with you!
Matt
It sounds like you are agreeing then? If you have the old shape which has Bump Steer as standard, the small amount of toe out that happens when the suspension compresses is quite noticably felt on the road as understeer when driving the car? That's what you seem to be saying and from experience, I would agree with you!
Matt
19 December 2002, 09:23 PM
#41
Scooby Regular
Join Date: Sep 2002
Location: Daventry
Posts: 71
Likes: 0
Received 0 Likes
on
0 Posts
Does this bumpsteer problem normally happen on legacys?
Cos today i was playing with our allignment kit at work and have set my car to .75deg neg camber and 1mm toe in. What are the verdicts on the set up? Any recommendations
I also had a play with our bumpsteer guage...and didn't find anything!
my car certainly handles better now i've removed the degree of positive camber!
Cos today i was playing with our allignment kit at work and have set my car to .75deg neg camber and 1mm toe in. What are the verdicts on the set up? Any recommendations
I also had a play with our bumpsteer guage...and didn't find anything!
my car certainly handles better now i've removed the degree of positive camber!
20 December 2002, 04:31 PM
#42
Scooby Regular
Join Date: Sep 2000
Location: London
Posts: 7,039
Likes: 0
Received 0 Likes
on
0 Posts
Can you compress (or extend if you're clever) the suspension whilst the Geom is being monitored?
If you see it change from 1mm toe in then I gues you do have some Bump Steer.
Matt
If you see it change from 1mm toe in then I gues you do have some Bump Steer.
Matt
20 December 2002, 06:16 PM
#47
Scooby Senior
Join Date: Jun 1999
Posts: 3,410
Likes: 0
Received 0 Likes
on
0 Posts
Sorry, bbs kept giving a jscript error or similar page... didnt expect it to have actually posted those _all_ okay.
"jmail.Message error '8000ffff'
The message was undeliverable. All servers failed to receive the message
/bbs/PostReply.asp, line 173"
just like that really!
"jmail.Message error '8000ffff'
The message was undeliverable. All servers failed to receive the message
/bbs/PostReply.asp, line 173"
just like that really!
Thread
Thread Starter
Forum
Replies
Last Post