Oversteer on corners
So, let's go back to this problem momentarily.
I've been thinking that my problem might be because the car is rolling too much in the bends. Sure feels like it. I wondered if the Aeon springs were missing or damaged, so I took a boroscope out into the garage and shoved the business end up the rear suspension, under the dirt shield.
They look OK to me...
I've been thinking that my problem might be because the car is rolling too much in the bends. Sure feels like it. I wondered if the Aeon springs were missing or damaged, so I took a boroscope out into the garage and shoved the business end up the rear suspension, under the dirt shield.
They look OK to me...
-
JonB - Coveted Fifth Gear
- Posts: 2357
- Joined: 14 Nov 2017
Next thing I am wondering about is the roll bar bushes. I've not done mine as it is a known pig of a job. Might loose or worn bushes contribute to the problem? They would certainly cause the rattle I'm getting over the bumps.
Last edited by JonB on Wed Apr 24, 2019 8:35 pm, edited 1 time in total.
-
JonB - Coveted Fifth Gear
- Posts: 2357
- Joined: 14 Nov 2017
JonB wrote:Next thing I am wondering about is the roll bar bushes. I've not done mine as it is a known pig of a job. Might loose or warn bushes contribute to the problem? They would certainly cause the rattle I'm getting over the bumps.
I've changed the roll bar bushes a few times on my S4 and I wouldn't put the job in the 'pig' category by quite some distance. Yes it needs a bit of effort /concentration/ care but unless there is something odd about the +2 roll bar it's nothing to lose any sleep over.
Stuart Holding
Thame UK / Alpe D'Huez France
69 S4 FHC
Honda GoldWing 1800
Honda CBX1000
Kawasaki H1 500
Yamaha XS2
Thame UK / Alpe D'Huez France
69 S4 FHC
Honda GoldWing 1800
Honda CBX1000
Kawasaki H1 500
Yamaha XS2
- 69S4
- Coveted Fifth Gear
- Posts: 1124
- Joined: 23 Sep 2004
Foxie wrote:661 wrote:I measured my spyder rear toe in recently and I have zero. As they are the 'upgraded' oval profile it would be difficult to weld an adjuster to them, and frankly for the fuss I'd like to do camber too. So it looks like a trip to Mr Wallet.
Forgot to mention, the rear camber was mad wrong also, but the Spyder adjustable top arm fixed that.
Have to say that the rose joint was not up to resisting accelerating/ braking forces and I had to fit brass collars (Conex Instantor !) to prevent the rose joint outer rings from coming out of the end eye. The original rubber bush was ok. I contacted Spyder about this but never heard back.
Just saw this reading back through the thread. Just an update on this. Spyder got back to me and supplied a pair of uprated rose joints later last year. All good since.
68 Elan +2, 70 Elan +2s
-
Foxie - Coveted Fifth Gear
- Posts: 1209
- Joined: 20 Sep 2003
If you take the time to clean and paint the roll bar, with a bit of lube the bushes slip on quite easily. I could see fitting them to a dirty rusted up bar would be much more difficult.
'73 +2 130/5 RHD, now on the road and very slowly rolling though a "restoration"
- mbell
- Coveted Fifth Gear
- Posts: 2643
- Joined: 07 Jun 2013
OK, it's on the list!
Now, about the cornering and roll steer. I came to the conclusion that A arms aside I should replace the Aeons in the rear suspension and fit the spacers if they are not present. This should stop the car rolling so much, and I think this is contributing greatly to the overseer.
Another point. I have commented about the vagueness the car has in a straight line at speed. I had thought caster was the problem, as my car has very little of it. Since I am running smaller tyres fitted by the PO (165 70 R13) it seemed to me that fitting the correct diameter tyres (186 80 R13) might help, as it would move the steering pivot point further away from the contact patch, thus allowing more leverage for the limited castor force to act with. A theory, anyway, so if it's wrong, let me know. So I looked at some old threads to see if I could find a reasonable tyre recommendation that wasn't going to cost an arm and a leg. Whilst reading these I saw a comment about the tyre pressures being pretty critical and so out I went to check them. Way too hard - 30/28 front/rear. Reduced them to 22/25 and the car seems to be rock steady in a straight line now. Who'd have thunk it?
Now, about the cornering and roll steer. I came to the conclusion that A arms aside I should replace the Aeons in the rear suspension and fit the spacers if they are not present. This should stop the car rolling so much, and I think this is contributing greatly to the overseer.
Another point. I have commented about the vagueness the car has in a straight line at speed. I had thought caster was the problem, as my car has very little of it. Since I am running smaller tyres fitted by the PO (165 70 R13) it seemed to me that fitting the correct diameter tyres (186 80 R13) might help, as it would move the steering pivot point further away from the contact patch, thus allowing more leverage for the limited castor force to act with. A theory, anyway, so if it's wrong, let me know. So I looked at some old threads to see if I could find a reasonable tyre recommendation that wasn't going to cost an arm and a leg. Whilst reading these I saw a comment about the tyre pressures being pretty critical and so out I went to check them. Way too hard - 30/28 front/rear. Reduced them to 22/25 and the car seems to be rock steady in a straight line now. Who'd have thunk it?
-
JonB - Coveted Fifth Gear
- Posts: 2357
- Joined: 14 Nov 2017
JonB wrote:How can they be toed out when there is no adjustment?
It's surprisingly common for the rear arms to be bent, it's often caused by people jacking on them after seeing the picture in the manual. If they do get bent it messes up you rear geo.
I have been having some odd things going on with my rear suspension too, turned out mine was a mixture of bad damper and aeon springs (i fitted solid bump stops instead of aeon springs by mistake). With those both fixed and a pair of Col's risers the handling is WAY better.
Chris
-
Grizzly - Coveted Fifth Gear
- Posts: 1862
- Joined: 13 Jun 2010
JonB wrote: Way too hard - 30/28 front/rear. Reduced them to 22/25 and the car seems to be rock steady in a straight line now.
So you had the front pressures higher than the back? Maybe thats why your steering was light!
- vincereynard
- Coveted Fifth Gear
- Posts: 1071
- Joined: 12 Jan 2015
Total Online:
Users browsing this forum: No registered users and 6 guests