do oem rs4 wheels fit my s4 and what is the best chip for it

[s4chris]

i have just bought a 1999 s4, everthings standard on it, i like the look of the rs4 oem wheels but im told the wheel bolts do not align (incorrect pcd)
also i would like to chip it, any ideas?? Fontain motors sound good option but i will need a mortgage

[Rob_O]

RS4 wheels (OE) have the same PCD (bolt pattern) as that of the S4 ... 5x112. The reason RS4 alloys won't work on the S4 is because of offset; RS4 offset is ET20 while S4 offset is ET45 (stock). About the most aggressive offset you can run without major rubbing - or full RS4 body conversion - is ET30, and even then you'll likely have to roll the fenders.

There are also a number of RS4 replicas, both aftermarket and through Audi as OE and factory accessories. These are available for both the TT (based on the Golf's A4-platform) and the larger B, C and D platform models (A4 thru S8). The TT's PCD is 5x100, while all other Audi models (save for the A2) employ 5x112. Perhaps this is where there's confusion about incorrect bolt pattern.

As for chip ... I'll leave that for the boys over there to enlighten you. :)

[Dippy]

Chris,

A stage 1 remap will transform the engine performance and cost around £750-1000 depending on where you go. I could write pages on my opinions about where you should go, but will spare you and others: If you are certain of going down the modding route, tell me (us) your requirements and constraints and then I can focus my comments.

However I will mention 2 significant points:

1) Insurance. By law you should tell your insurer if you modify the car, and if you don't you risk invalidating your cover. If you do tell them, they may just increase the premium or they may refuse to continue your cover (which is why you should check in advance).

2) Warranty. Whilst there are some tuners such as Fontain who will maintain warranty after modding, you pay for this up front and probably afterwards by being tied to them for service. Personally I wouldn't trust warranty companies anyway. However make no mistake: Chipping an engine increases the internal stresses and reduces the mean time to failure. This is not opinion, it is a simple reliability calculation. Therefore you should expect a modded car to fail sooner than a stock one (on average - there's no accounting for bad luck), and therefore you should reduce your service intervals (I recommend by 10-20% depending on level of tune). Also there are some parts of the S4 (such as the TBB) which are not up to the job for a stock engine, let alone a modded one. Then there's the brakes...

[s4chris]

cheers for the advise, i think i will go for replica rs4s 18" although tempted with 19". Rochford tyres in essex have both. as for modding the e.c.u i want to be able to switch to and from stock to 320 bhp, like the idea of valet mode and ecu kill which is why fontain interested me.though would be interested to hear other options.i already change oil and filter at 3,000 mile intervals and use mobil one, i wont be caning it continuosly but its nice to have it there if i need it