Leon Cupra R bushes Question

[Rgm racer]

There are just so many variables that can affect the handling and getting the balance right is a real art and only hours and hours of testing would really give some good answers. Even then quite different set ups might actually achieve a similar end result in terms of performance/lap time.

Ride height front/rear, suspension and arb settings, tyres inc. different pressures, front/rear track width, overall stiffness of car [ie bushes,cage,strut braces, seam welding] etc. all affect handling overall and can affect each other as well which is why finding what really is the best set up is an absolute art and in reality you probably never really get there due to the variables of different conditions thrown in

The best anyone can really aim for is a good base line set up and then tweak from there as required, only if of course it's that important such as if actually competing. Otherwise for road and track days etc. a good base setting should be adequate.

 

[Muttley]

What I really meant is that just lowering the Golf Mk.4 platform will result in poorer handling, but my post was too general, as you rightly point out. As I understand it, the front suspension geometry means that the roll center drops by by twice as much as the CofG, which makes the tendency to roll much worse.

As you say, there are a huge number of variables to consider. All I can say for certain is that, despite being 15mm lower, the Sports suspension performs much better (corners flatter, keeps the wheels in contact with the road) than the Comfort suspension in roadholding, with an accompanying reduction in ride comfort for the passengers (the driver is has the steering wheel to hang on to). The ride is more bumpy, but not unbearable. Both were developed by VAG, of course, so have the benefit of their budget and test facilities.

For road use, I would not change my car's suspension at all.

 

[Rgm racer]

Forgot camber/caster and toe in/out as yet more variables!

Totally agree on cars just for road use. The standard suspension on something like a LCR is perfectly up to anything anyone should want to do on the road in terms of handling/performance. Only if racing or wanting to get more seriously into track days is it really worth investigating the above. Maybe if something like suspension or brakes has to be replaced anyway might then be worth seeing if anything available at that time might offer a bit better performance/value than oem, otherwise like you say, stick with oem.

 

[Grayboy]

To be fair a premium set of tyres do more for the capabilites of your car.
Always makes me laugh when you see someone with coils, arbs, bushes then a budget set of tyres negating all the money they have spent.

1st on my list is a set of conti SP 5 then new ball joints, track rods, top mounts.

Did this on my last 3 cars and made the world of difference as much as any suspension kit/coils I've fitted.

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[ARO]

Your right there Gray boy, I replaced some kumho ku31 with pirelli p zero rosso and noticed an instant improvement. How do you rate the sp5?.... I'm going to try some concentric 5mm alu spacers on the front after doing the shocks etc... Porsche add them to reduce understeer, i will report back on what i think!

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