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Triumph Torque    Cars    Spitfire/GT6  ›  New spring suspension alignment
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New spring suspension alignment Print
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Rob123
July 13, 2017, 4:51pm Report to Moderator

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Mk2 Spitfire
The rear wheels were disappearing under the wheel arches so decided to change the spring. The rear spring is obviously stiffer than the old one and the car now rides higher however when the car moves forward the bottom of the wheels get closer together. When the car is reversed the wheels sit "right" and look "normal".
Have attached two pics, one showing wheels angles from rear of car and one showing the right hand rear wheel looking from above.

What do I need to do to get it sitting correctly?



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Rob
Mk2 Spitfire
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Rob123
July 13, 2017, 4:54pm Report to Moderator

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Couldn't attach second photo but it is a view from above the rear wheel arch showing the front of the wheel angled towards the centre of the car, probably by half and inch compared to the rear of the tyre. Same on other side.


Rob
Mk2 Spitfire
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Pete Lewis
July 13, 2017, 7:40pm Report to Moderator

Tssc Herts and Beds A.O.
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You needb150  lbs on each seat to set the static ride heght,

get two straight timbers and place against the tyres each side, sit them up above the bulge in the bottom of the tyre

tape measure across the timbers at the back of the tyre and note the dimension
do the same at the front ,  the ey should be the same or a little narrower at thr front
You need to add or remove shims from the radius arms to acheive  0- 1/16th  toe in ,   thats 1/16" narroer at the front than the rear at the tyre diameter
You must roll the car for every resetting especially if its been jacked
pete


1964 1600 Vitesse 6 Cactus and Black , now  sold
now have T2000   Mk2 saloon in French Blue/grey trim  been  restored without running since 1997
now has power steering ,poly bushed and Alfa 156 seats
location  Luton
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Rob123
July 14, 2017, 9:02am Report to Moderator

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Thanks Pete,
Do you know what thickness of shim gives a certain change at the wheels?


Rob
Mk2 Spitfire
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Pete Lewis
July 15, 2017, 6:36pm Report to Moderator

Tssc Herts and Beds A.O.
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Sorry my workshop manuals dont give any clues,,  
typical triumph always leave out the clues you need to button a question up


1964 1600 Vitesse 6 Cactus and Black , now  sold
now have T2000   Mk2 saloon in French Blue/grey trim  been  restored without running since 1997
now has power steering ,poly bushed and Alfa 156 seats
location  Luton
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JohnD
July 15, 2017, 6:58pm Report to Moderator


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You have new spring?   Have you rolled the car to and fro since fitting?
Do that, but first loosen the bolts on the spring shackle etc.
Then roll.
Then support the car on axle stands, under the uprights, so that the cars weight still compresses the spring.
Tighten the bolts.
Drive it.    The spring should relax a bit and allow a more normal stance.
Then drive it some more.  I'll bet the camber will go back towards zero ( upright). From the extremely  


Serial Vitesse racer.

Old Blue.  1995-2001
Silverback. 2001-2007
SofS. 2007 - to date.

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RobPearce
July 17, 2017, 9:20am Report to Moderator

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Rear wheels tucking under when rolled forward and splaying out when rolled backward could be a result of excessive toe-in. Try adding a couple more shims to each of the radius arm brackets (rear of floor).


Current fleet
1967 Vitesse 2L conv "Tessa"
1970 Spitfire Mk3 (project) "Toby"
1972 GT6 Mk3
Not enough time or space
Recently sold:
1972 2.5 PI estate "Harry" (gone to russell on here)
1973 Toledo 2-door "Spike" (gone to a club official)
Used to have:
1968 Vitesse 2L saloon
1980 Dolomite 1500
1977 Dolomite 1850
1980 Dolomite Sprint
1982 TR7 DHC Sprint
1975 2500S saloon
1971 Herald 13/60 Estate (with 1500 Spit engine)
1975 Stag
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Casper
July 18, 2017, 8:04am Report to Moderator


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Quoted Text
Do you know what thickness of shim gives a certain change at the wheels?


Standard shim are 16 g steel 1.52 mm <= 1/16" and I believe they adjust the toe by approx 1/16"

But fit/remove and remeasure.

As John states, the suspension must be settled by rolling (last roll forward) before each measurement.  You clearly have too much toe in at present.

C.


Herald Anorak
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Rob123
August 12, 2017, 12:07pm Report to Moderator

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Got the tracking about right in terms of toe in however the camber was way too much. (wheels leaning out at the top). Have fitted a half inch block but it hasn't made a huge difference. Am I missing something? How do I get the wheels to be vertical or small bit of negative camber?


Rob
Mk2 Spitfire
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drofgum
August 13, 2017, 12:46am Report to Moderator

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Rob,
If the camber isn't in the normal range you can't set the toe correctly. Have you rolled the car some distance to settle it after it is removed from the jacks? If not it will settle quite a bit, and once it has you should re-check the tracking.
                                                      Cheers,
                                                      Paul
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glang
August 13, 2017, 6:50am Report to Moderator

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Just a thought but it is the right spring isnt it? I dont know what variations are available and if they would fit but it might explain the problem.....
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Rob123
August 14, 2017, 1:18pm Report to Moderator

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Its been driven a mile to let everything "settle". Are vertical wheels acceptable for a spitfire?


Rob
Mk2 Spitfire
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JohnD
August 14, 2017, 2:30pm Report to Moderator


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There's "vertical" and 1.2degrees of negative (or positive) camber.   The human is good but measurement is better!
John


Serial Vitesse racer.

Old Blue.  1995-2001
Silverback. 2001-2007
SofS. 2007 - to date.

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stevesspit16
August 16, 2017, 1:43pm Report to Moderator


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Hey Rob, I see this thread is now a month old; have you resolved the issue?

If not....

Did you replace any other components?
Did you loosen/remove/tighten any other bushings etc?
Did you torque those down with the suspension at proper ride height? As the guys alluded to, that could pre-load one or more bushings and keep the car from settling.

Lastly, to really understand the suspension is the best thing you can do.  As you know the Spit/GT6 is different than most, and if you haven't yet seen it, I think it is best explained by Paul..... http://auskellian.com/paul/links_files/performance_enhancements.htm#rear

Please update us with your situation/solution.

All the best.

Steve

PS: I run with about 1 degree toe in, both front and rear and after running in forward I've got about 1 degree negative camber in the back.  Noticeably different when I back up before stopping where the negative increases to maybe 3 or 4 degrees.


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Rob123
August 19, 2017, 6:19pm Report to Moderator

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Hi Steve and other posters,

Still working on it - reserved all day today but it didn't work out as planned. The spherical bush in the gear selector dropped out while driving round the block to get everything to settle! Will try to sort this during the week and attack the suspension next weekend. Will report back one way or the other soon.

In answer to your questions also replaced the shocks and securing nuts and bolts etc and tightened everything loaded up.

Thanks for the concern.

Rob.


Rob
Mk2 Spitfire
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