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Audi RS3


joeB12
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With the popular suspension design that is used for the new VW golf, Audi A3, Seat Ibiza (the list goes on) a common complaint is under-steer, and a slightly unsure feeling when entering and leaving a corner 'enthusiastically' 

We decided to to try and improve on this with an Audi RS3, but, at the same time keep the cars OEM driving comfort.

Now as the first port of call, we changed the tyre size. The Audi RS3 is one of the only cars on the market at the moment with a staggered tyre size front to rear, but running the wider tyre at the front. Rumor has it this is to counter an under-steer issue that is a result of the engine being mounted quite far forward.

A 'conventional' tyre set-up was used, changing the original size -

F -235/35x19
R -225/35x19

to

F -265/30x19
R -265/30x19

We fitted Vredestein Sessantas all round which work very well on all high power four wheel drive Audis.

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Noticeable improvement.

Modified Anti-roll bars were then installed as an attempt to stiffen up the overall feel when powering into a corner. 

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This worked very well, eliminating the majority of the vague feeling when cornering. But it still felt like more could be done to improve it's handling.

H&R lowering coils were used. This worked, but with a 35mm drop front and rear, combined with the modified tyre size, it was just too low, and after the coils would have settled it was clear that the tyres would eventually rub on the outer lip of the wheel arch. The wheel alignment after the installation confirmed that it was too low, not only impractical, but running such a deep negative camber angle uneven tyre wear would be inevitable.

Back to the drawing board, and an adjustable H&R coil-over was agreed upon. 

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Success! The same result as with the H&R coils, only now we can tailor the ride height to accommodate the new tyre size and find a suitable 'middle ground' for the basically non-adjustable front camber. 

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One final geometry check and adjustment, and its ready. Handling massively improved, and smiles all round!


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Joe 
 

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Interesting thread, it looks like its still on the standard rims, can you put a 265 tyre and a 225 tyre on the same wheel width? Got to admit it doesn't really look any different.

 

Also doesn't the RS3 have magnetic ride? How does the coilover swap work with that?

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Yes, still on the OE rims, they took a 265 comfortably. The final difference in ride height was 10mm lower at the rear and 25mm at the front. That being said, making it look different wasn't really our aim, improving the performance was.

I believe only the R8 and some of the TT's are released with Magnetic Ride in the Audi range.

Joe

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