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Old 04-01-2014, 02:58 AM   #1
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Default Roll centre Question

Roll centre question, Hi guys, long time reader, first time poster.
could some one explain to me in layman's terms the effect of each of these on the roll centre.

Upper inner camber link - Higher = Lower =

Upper outer camber link - Higher = Lower =

Lower inner Hinger pin Higher = Lower =

Track width - wider = Shorter =

Effect of more angled camber links

A higher roll centre gives-

A lower roll centre gives -

How to achieve more camber change through roll centres -
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Old 04-01-2014, 03:23 AM   #2
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Old 04-01-2014, 04:23 AM   #3
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In a few words:
- Always try to keep front and rear links in similar length and angle. This should make the car more progressive and predictable under all circumstances.
- Long / parallel links (low roll center) are good for high traction conditions.
- Short / angled links (high roll center - more camber change) are good for low traction conditions. The car feels more stable and they help prevent spin-outs.
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Old 04-01-2014, 07:22 AM   #4
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Quote:
Originally Posted by SWilliam View Post
Roll centre question, Hi guys, long time reader, first time poster.
could some one explain to me in layman's terms the effect of each of these on the roll centre.

Upper inner camber link - Higher = Lower =

Upper outer camber link - Higher = Lower =

Lower inner Hinger pin Higher = Lower =

Track width - wider = Shorter =

Effect of more angled camber links

A higher roll centre gives-

A lower roll centre gives -

How to achieve more camber change through roll centres -
Ya check out martin crisps website learnsetup.com all your questions and more will be answered.
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Old 04-01-2014, 08:22 AM   #5
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(Least effect)
Upper outer camber link @Knuckle
More Shims=Higher roll centre (Less Roll)
Less Shims = Lower roll centre (More Roll)

(More effect)
Upper inner camber link @bulkhead
More Shims=Lower roll centre (More Roll)
Less Shims = Higher roll centre (Less Roll)

Track width
Wider = Higher roll centre (Less Roll)
Narrow = Lower roll centre (More Roll)

(Most effect)
Toe Bars
More Shims=Higher roll centre (Less Roll)
Less Shims = Lower roll centre (More Roll)

Effect of angle of canber link
More angled - (relative) More aggresive corner entry but push around apex to exit
Parallel to ground - Less aggressive corner entry but better grip around apex to maybe exit (depends on other parameters)

A higher roll centre gives;
- better loading to the outside tyres thus more grip but limited by tyre grip
- Higher tyre temperature
- Can lower cornering speed if loaded too heavily

A lower roll centre gives;
- opposite to the above mentioned

How to achieve more camber change through roll centres?
It doesn't through roll centre. More camber change is achieved when the difference of length between the upper and lower arms are greater.


Hope this helps.
Please do correct if there's any mistakes in the descriptions

Cheers!!
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