Chimaera geometry
Chimaera geometry
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Discussion

asd2001

Original Poster:

164 posts

104 months

Monday 28th March 2022
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New rainsports fitted on Friday and going in to get 4 wheel alignment checked at reputable local garage with a new Hunter machine (sadly no TVR specialist nearby). What’s the consensus on settings for general road use? Have they moved on from what’s in the bible?
Thanks

Belle427

10,825 posts

250 months

Monday 28th March 2022
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I'd rather take it to somewhere that knows these cars.
Last 2 places I visited with hunter rigs didn't have the Chim on the system.
Most operators just rely upon the machine settings and wouldn't use provided ones.

bobfather

11,194 posts

272 months

Monday 28th March 2022
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For road use I have mine checked to the following:

Front Toe = 1.5mm overall which is about 12 minutes
Front camber = 0.5 to 0.75 degrees neg

Rear camber = 1.4 degrees neg
Rear toe = 3mm or 26 minutes toe in overall

This is only for standard ride height, horizontal lower wishbones at rest

Rear 155mm, front 145mm outrigger corner to ground will be close enough to horizontal lower wishbones

Italian450

96 posts

104 months

Tuesday 29th March 2022
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NicBowman

785 posts

255 months

Tuesday 29th March 2022
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I have used a non specialist in the past that adjusted my perfectly serviceable geometry to definitively wrong. So, if you don’t notice a problem, keep your current geometry until you get to a specialist, would be my advice.

On a more diy note, measuring geometry is remarkably simple to do at home. Except for the complex stuff like castor angle.

Nic

Classic Chim

12,424 posts

166 months

Tuesday 29th March 2022
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NicBowman said:
I have used a non specialist in the past that adjusted my perfectly serviceable geometry to definitively wrong. So, if you don’t notice a problem, keep your current geometry until you get to a specialist, would be my advice.

On a more diy note, measuring geometry is remarkably simple to do at home. Except for the complex stuff like castor angle.

Nic
That’s assuming you have a flat and smooth floor but yes you are perfectly correct there.
For peace of mind it’s always better to get it set by a decent geo specialist and I’d only use people who know the cars. It’s the rear tow adjusters that can stump the average fitter!?!
It’s then a very good idea to check it at home for future reference. It’s all very well doing it at home but it’s not necessarily going to be perfect and a small increment out and you will be wearing your tyres badly over thousands of miles.
I’ve used strings lots of times on race cars that only manage a few miles before being knocked out again. You are constantly checking after ride height or corner weight changes anyway. My point is once set a Tvr might go many thousands of miles before it ever needs doing again so probably best to let a good specialist do it who won’t clang spanners off your wish bones etc etc.

asd2001

Original Poster:

164 posts

104 months

Tuesday 29th March 2022
quotequote all
Sadly no TVR specialists with alignment kit within a few hours from here so will have to take my chances. One of my old front tyres was wearing on an edge so looks like it needs some tweaking to save trashing my new tyres. The garage I plan to use are happy to use bespoke settings and are quite pedantic so hopefully will get a decent result.
The rear wishbone adjusters were freed off recently so hopefully they’ll still be ok…

Classic Chim

12,424 posts

166 months

Tuesday 29th March 2022
quotequote all
asd2001 said:
Sadly no TVR specialists with alignment kit within a few hours from here so will have to take my chances. One of my old front tyres was wearing on an edge so looks like it needs some tweaking to save trashing my new tyres. The garage I plan to use are happy to use bespoke settings and are quite pedantic so hopefully will get a decent result.
The rear wishbone adjusters were freed off recently so hopefully they’ll still be ok…
You shouldn’t have any problem then.
Setting camber and track on the front is very easy to be fair.

QBee

21,811 posts

161 months

Tuesday 29th March 2022
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I knew there was a good reason not to live in Scotland - all these years I just assumed it was the bloody weather whistle

laracer

203 posts

184 months

Wednesday 30th March 2022
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Why don't you use these guys https://www.dreadnoughtgarage.com/ - they are supposed to be TVR specialists (I haven't used them myself) and do alignment. I would be interested in your results with the Rainsports as I have them also - and I live in Perthshire.

asd2001

Original Poster:

164 posts

104 months

Wednesday 30th March 2022
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Forgotten about them and their TVR history. Booked in, so will let you know how it goes.

asd2001

Original Poster:

164 posts

104 months

Friday 8th April 2022
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Good shout. Alignment done this morning - feels a bit sharper. Really helpful & knowledgeable at Dreadnought, will use again. Lovely morning for a cross country run, even though my heater fan packed up midway…

andrewbr

67 posts

60 months

Friday 8th April 2022
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What settings did you end up with?

asd2001

Original Poster:

164 posts

104 months

Friday 8th April 2022
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Went with the standard settings they use / recommended. Very close to the TVR faxed ones.