a tracking question

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a tracking question

Postby mickmick » Wed 04.10.2006, 16:19

went to local tyre place, asked them about racking for the elan, bloke told me that all they could do is set them up parrallel

so, what is the right adjustment figures, so i can take it back to them and get it done

or failing that, can anyone tell me of a place in S Yorkshire that can do a full 4 wheel alignment( and hopefully give me the figures incase the garage hasnt got them to hand

Mick
now i have one, i just want to keep tinkering with it!!!!!!!
sorry mum :(
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Postby Sy V » Thu 05.10.2006, 07:49

Image

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Re: a tracking question

Postby roy666 » Tue 29.12.2015, 18:31

Hi - I tried to get a 4-wheel tracking alignment on my S2 at a local place.. with all the laser kit, but they declined. They were more than happy to do the front tracking but not the rear. Apparently, I was infoemd by the manager that there is some sort of bush on the rear, apparently, that probably needs replacing to make the rear tracking worthwhile and these bushes are hard to come by (does not suprise me).. but does anyone know what they are talking about.

thanks Mike
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Re: a tracking question

Postby John_W » Tue 29.12.2015, 19:03

Mike,
I presume from your avatar that you have a SE. In that case all I can think of is the bolt with the eccentric cam head that is used to make adjustments. Other than that, the bushes could be nacked, true, but I don't think anything else is adjustable on the SE. I've never adjusted rear geometry, so others more knowledgeable will be along in a minute, I'm sure.
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Re: a tracking question

Postby par » Tue 29.12.2015, 20:34

4 Wheel Alignment specialist I have used in the past - Progrip in Larbert, wouldnt touch the Lotus either because it isnt straightforward to do it right. Think he mentioned having to fit shims to make any adjustments.
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Re: a tracking question

Postby Rambo » Tue 29.12.2015, 21:05

The shims have been available through a group buy on LEC in the (recent ?) past Par. I think Dave Pink had something to do with it from memory. Anyone ??
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Re: a tracking question

Postby lotusles » Tue 29.12.2015, 21:16

http://www.lotusm100.com/manuals/Elan-M ... ension.pdf

This is the link showing front and rear suspension settings and how to adjust.
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Re: a tracking question

Postby lotusflasherman » Tue 29.12.2015, 21:19

First - make sure wheel bearings are correctly adjusted and don't have any 'play' in them or your wasting your time measuring anything.

Front Suspension Castor, Camber and Toe-Out are all adjustable. Figures from Elan Service Notes...

Camber -0.25°; +/- 0.25° (Negative camber is when top of wheel further in than bottom.) Tolerance is from 0° (wheel vertical) to - 0.5°(not a lot) so wheel should essentially look vertical. This is adjusted by the inboard bolt on the top balljoint. Early cars had an eccentric washer integral with the bolt, later cars have a 'camber adjustment plate' under the bolt.

Castor is +1°, tolerance +1/2°, -0° (previously known as King Pin Inclination). This is the difference in forward position of the upper and lower suspension pivots that the steering rotates about and helps the steering self-centre and influences the 'feel' or feedback from the steering. There are shims either side of the top ball joint and castor is adjusted by moving these from on side to the other.

Toe-Out is 0°to 0.25° and that's easy as it's adjusted by turning the track rods.

Rear Suspension.

Camber -0.5°; +/- 0.25° This is adjusted by an eccentric adjuster on the top link.
Toe-In "+ 1.5 to + 2.0 mm each side" This is adjusted by an eccentric adjuster on the lower wishbone front bush.
(Note that this is quoted in 'mm', not degrees, so the distance between measuring points is significant. Some manufacturers state whether it's on wheel rim or tyre wall but I've not found anything in the Elan Service Notes and SE and S2 had didn't size wheels too, but as long as you've got something around 1.75mm toe-in on the rim you're be in the right ball-park...)

I'm a great believer in "If it ain't broke, don't fix it' but if a previous owner has stripped the suspension to do a fancy paint job you may find it's all over the place if he (or she) didn't understand the significance of the position of the shims or eccentric bolts. :banghead:
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Re: a tracking question

Postby roy666 » Tue 29.12.2015, 21:32

Hi Guys.. sorry, the avatar is misleading.. the pic is of my old SE. At the moment I'm driving a 96 S2... Is the S2 rear wheel structure, suspension, etc. the same as the SE then?
M
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Re: a tracking question

Postby lotusflasherman » Tue 29.12.2015, 22:04

roy666 wrote:Hi Guys.. sorry, the avatar is misleading.. the pic is of my old SE. At the moment I'm driving a 96 S2... Is the S2 rear wheel structure, suspension, etc. the same as the SE then?
M



Main changes to suspension were during SE production so I believe S2 is the same as late SE's - as far as I've been able to determine. Manual said S2 wheels couldn't be fitted to SE because of differences in front wishbones but seems lots of SE owners have so never worked out why they said that....
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Re: a tracking question

Postby John_W » Tue 29.12.2015, 22:40

Mike,
The S2 rear adjustment mechanism is different from the SE. The S2 has a threaded top link for (I presume) camber angle adjustment, whereas the SE has a solid U-section. I'm not sure if the S2 uses shims or an eccentric cam head bolt for castor. The Service Notes should state.
John
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Re: a tracking question

Postby cliff » Tue 29.12.2015, 23:32

Mike,

GG Steel in Kirton Lindsay did my car a couple of years ago, just a quick blast up the A15 from you. I took pages from the service manual with me so they had the correct info.

http://www.ggsteel.co.uk/gg-steel-after ... ncolnshire

There are also a couple of nice roads nearby for testing the new set up. :twisted:
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Alfa Romeo 159

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Re: a tracking question

Postby roy666 » Wed 30.12.2015, 16:30

Thanks Chaps for all the info. and Cliff the GGSteel looks interesting.
I'm due a visit to Gerald at GTS.. so I think I'll get something sorted then.
HNY!
M
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