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Munter

Original Poster:

25,427 posts

129 months

[news] 
Saturday 28th July 2012 quote quote all
As I've driven the car more I've noticed it seemed to have an inclination to go right on throttle and left when you get off it. So took it around to the local laser alignment place:

Before >>> After


Only driven it a short distance home but it "feels" better.

To start with we didn't think he'd be able to do it as the left rear of the car was riding 1/2 an inch lower than the right.... But after raising the car on the alignment rig it'd settled flat. scratchchin Underlying Shock problem?

vrsmxtb

1,683 posts

44 months

[news] 
Saturday 28th July 2012 quote quote all
To be honest, on an MX5 there is very little excuse by a technician not to get all the values nice and equal both sides unless alignment bolts are seized etc. I had it done once by a place with a Hunter and got similar readings to your "after" settings, all in the green but not identical left to right. However, after going to wheels in motion for a second look, everything was further adjusted to be pretty much perfectly equal and as close to their fast road spec as was possible with a standard height car. Uneven front camber jumps out from your pic even "after" as does uneven caster.

And my car did the whole move with the throttle thing - had a broken spring knackered rear shock and broken arb drop link.... so try all those for starters!!

MX-5 Lazza

7,295 posts

107 months

[news] 
Saturday 28th July 2012 quote quote all
What were they using as their target values? It all looks very neutral, the sort of thing you might see on a family car to reduce tyre wear. The front caster wasn't touched and the rear has almost no toe but plenty of camber which looks a bit odd to me. Also, toe out at the rear should always be avoided.
Overall I'd say I'm not impressed.

devnull

1,127 posts

45 months

[news] 
Sunday 29th July 2012 quote quote all
I've got -2 on my rears (Mk2 1.8). Sticks like st to a blanket on the road, and mway manners are nicely improved.

Munter

Original Poster:

25,427 posts

129 months

[news] 
Sunday 29th July 2012 quote quote all
MX-5 Lazza said:
What were they using as their target values? It all looks very neutral, the sort of thing you might see on a family car to reduce tyre wear. The front caster wasn't touched and the rear has almost no toe but plenty of camber which looks a bit odd to me. Also, toe out at the rear should always be avoided.
Overall I'd say I'm not impressed.
It was using whatever the Hunter computer system suggested. I was with him to select the right car from the list. NC with 17" wheels.
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Richyvrlimited

1,396 posts

51 months

[news] 
Sunday 29th July 2012 quote quote all
MX-5 Lazza said:
What were they using as their target values? It all looks very neutral, the sort of thing you might see on a family car to reduce tyre wear. The front caster wasn't touched and the rear has almost no toe but plenty of camber which looks a bit odd to me. Also, toe out at the rear should always be avoided.
Overall I'd say I'm not impressed.
QFT.

I'd not be particularly happys with that alignment. Ignoring the fact it has toe out, it's not even even left to right!

Munter

Original Poster:

25,427 posts

129 months

[news] 
Sunday 29th July 2012 quote quote all
So do we know any specialists in the West Mids who'll want to get it spot on?

1point7bar

1,091 posts

36 months

[news] 
Sunday 29th July 2012 quote quote all
Positive camber at static ride height FFS.

MX-5 Lazza

7,295 posts

107 months

[news] 
Sunday 29th July 2012 quote quote all
Is Roddo within a reasonable distance?

roddo

351 posts

83 months

[news] 
Sunday 29th July 2012 quote quote all
If you want a run to sheffield I will set it up for you........

EDIT. Lazza beat me to it.......

nikpro

108 posts

114 months

[news] 
Monday 30th July 2012 quote quote all
Munter,

although your car is showing 'within manufacturers spec' on the Hunter aligner the alignment isn't particularly good!

The rear shows 'toe in' on both rear wheels (N.B. positive values on a Hunter is toe in where as negative are toe out - the little illustration at the side means nothing) which is correct but there is a large difference side-side; this gives a large negative thrust angle from your rear axle which isn't particularly good! The rear toe should be even side-side.

The front axle concerns me more! You have positive camber on your right front wheel (drivers side) and negative camber on the nearside. Ideally you want negative camber set on both sides. At the moment the difference in cambers will cause a 'pull' on the vehicle.

I recommend taking the car to an alignment centre that usses a Hunter Hawkeye machine and knows MX5's well.

Here are some reccomendations:
http://www.mx5nutz.com/forum/index.php?showtopic=1...

http://www.mx5nutz.com/forum/index.php?showtopic=1...

Lots of very satisfied MX5 customers!

http://blinkmotorsport.com/wheelalign.html

Also recommended in the 'Wheel Alignment section here:

http://www.pistonheads.com/xforums/topic.asp?h=0&a...







Edited by nikpro on Monday 30th July 01:18

hornetrider

49,871 posts

93 months

[news] 
Monday 30th July 2012 quote quote all
Powerstation in Tewkesbury did a great job on my Mk1, and are on the WIM recommended list.

Munter

Original Poster:

25,427 posts

129 months

[news] 
Monday 30th July 2012 quote quote all
Thanks for the suggestions guys. Powerstation is closest, but the OH has a Sister in Sheffield so that's a possibility also. I'll have to see if she fancies a visit.

skinny

3,709 posts

123 months

[news] 
Monday 30th July 2012 quote quote all
+1 positive camber on the front right is not good.

VladD

5,451 posts

153 months

[news] 
Monday 30th July 2012 quote quote all
So is there a "template" setting for Mk1s for general road use and does this differ from the manufacturers recommended settings? This is all a bit of a grey area for me to be honest. If someone knows of a good article to read to explain things then that would be a great help.

MX-5 Lazza

7,295 posts

107 months

[news] 
Monday 30th July 2012 quote quote all
Miata.net is very useful for this sort of thing:
http://www.miata.net/garage/align.html

Lanny settings:
http://www.hummingbirds.net/alignment.html

FM recommends:
Front wheels:
Caster: 5.0 degrees
Camber: 1.0 degree negative (about 5 mm out at the bottom, per side)
Toe in: 1.6 mm (0.8 mm per side)

Rear wheels:
Camber: 1.5 degrees negative (about 8 mm out at the bottom, per side)
Toe in: 1.6 mm (0.8 mm per side)

VladD

5,451 posts

153 months

[news] 
Monday 30th July 2012 quote quote all
Cheers Lazza.

MX-5 Lazza

7,295 posts

107 months

[news] 
Monday 30th July 2012 quote quote all
Those settings are for the Mk1/2 of course but the general advice is the same. I'm sure Mk3 alignment setting won't be far different though.

Munter

Original Poster:

25,427 posts

129 months

[news] 
Tuesday 31st July 2012 quote quote all
roddo said:
If you want a run to sheffield I will set it up for you........

EDIT. Lazza beat me to it.......
So roddo. Do you open on weekends? smile

roddo

351 posts

83 months

[news] 
Tuesday 31st July 2012 quote quote all
Munter said:
So roddo. Do you open on weekends? smile
Yes mate but some weekends we are away racing......

Give me a call on 0870 600 8787 and I'm sure we can sort a date out.
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