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The mkiv Supra Owners Club

Reducing understeer


downimpact
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There`s a couple of options,

Get a geo setup with more negative camber on the front,

If you have adjustable suspension or antiroll bar, stiffen the rear or soften the front, sidenote, when adjusting any suspension do it with small adjustments and have an open space to test on.

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Low speed under steer tight corners, happens in both wet and dry (round bus stop at llandow). Happens upon turn in and fails to grip until either slowing down enough and re-turning in or putting more throttle on to induce over steer.

 

I have the stock bilstein option, have found the same problem with both stock 16s and stock 17s and standard tyre sizes.

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There`s a couple of options,

Get a geo setup with more negative camber on the front,

If you have adjustable suspension or antiroll bar, stiffen the rear or soften the front, sidenote, when adjusting any suspension do it with small adjustments and have an open space to test on.

 

I have thought about running more negative camber as it tends to be the edges of the tyres that wear out quickest due to cornering. How much would be advisable?

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Llandow is incredibly tight for a big heavy road car round the chicane. Post a front end photo if you have one, of it going round there. It's probably needing a lot more negative camber on the front, or a lot more spring and / or ARB stiffness all round, the former of which may well compromise tyre wear on the road, and cause bad tramlining, the latter will shake you and car to bits, long term. Compromising corner entry speed in favour of getting on the power as early as possible is the way to drive around it to some extent.

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Not stiff enough, not enough negative camber. It may well be getting onto the front bump stop with that much roll, which sends the outer front wheel rate soaring and kills grip.

 

So new suspension, bushes (probably still original), more negative camber. Would be the first/most cost effective things to address?

 

Then strut brace or more show than go?

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