RS – Racing Street, Rally Sport, Really Speedy?
Once again Audi show the entire world they can produce a supremely quick car that handles enjoy it is on rails.
The earlier RS4 may benefit from a set of uprated shocks all round and the turbo engines have a lot of potential for tuning up.
The later RS4 is pretty much perfect from the factory but you can continue to add a little more power! !
TorqueCars recommend that you get adjustable shocks and set them up to suite your driving style and preference.
Tuning tips and articles
It hardly seems like there may be any point tuning one of several fastest cars Audi has turned out in while. Which is, until you realise just what is on offer and how much of an electric power gain there is certainly waiting for you.
As with most VAG engines the RS4 engines have ended engineered and will cope with bigger power gains without affecting reliability.
The RS4 is a stunning car from Audi but you can make it much better with a few straightforward to apply performance modifications.
The engines available changed over time so listed here is a quick overview. The B5 chassis RS4 built in 2000-2001 had the powerful 2.7 V6 twin cam twin turbo engine. The two blocks on offer were the ASJ and AZR. These are fascinating propositions for your tuner needing only a turbo conversion and remap to boost power levels by another easy 40% or more.
Then we arrived at the B7 chassis built around 2006-2008 with its 4.2 litre V8 Twin Cam Fsi engine went back to Nasp engines. Factory performance figures actually seems pessimistic with many owners squeezing the -62 run in around 4 seconds. This model handled a lot better than it’s predecessor.
Audi RS4 Tuning modifications.
Your aim when tuning should be a fantastic flat torque curve along with a wide power band. In the NASP engine TorqueCars recommend that the best mechanical mods you should do is to fit a speedy road cam. Apply a remap and some intake/exhaust mods to maximise this but you will end up with a reliable and powerful car.
The Turbo engine is merely crying out for a turbo upgrade. You might have 2 routes, a large single turbo for big top end power or a larger Twin turbos. Twin turbo upgrades can be found from Garrett based twin turbos and a number of hybrid options are around that use the regular Audi RS4 turbo and add uprated internals.
Oil changes must be more regular and you must let the turbos cool down a little after a run or you risk turning the oil to sludge, with oil pump blockages or perhaps the turbos will prematurely wear as the oil delivery stops with the engine switched off.
For those who have uprated the strength by a lot more than 30% it would be smart to uprate your clutch to handle the power, engine cooling should become a priority and.
Audi RS4 Intake and Exhaust Tuning.
Now we move on to the exhaust and intake and ensure proper flow through the engine. The conventional RS4 setup is pretty good on both engines. For the NASP RS4 engine TorqueCars would say to choose a washable high flow cotton panel air filter. On the turbo engines, a suitably setup induction kit, with a cold air feed and preferable housed in an air box.
Miltek offer a great range of performance exhausts which is also worth sourcing a sports catalyst to release the utmost potential through the engine.
Using the NASP as well as to a lesser degree the turbo engine, airflow throughout the head might be dramatically increased with some professional porting and ‘polishing’. The flow rates for each port should be and match setup to look at any other engine mods you possess had done.
When you start tuning your RS4 you will find that the typical clutch starts to complain so get an uprated clutch. The wonderful turbo engines are just begging to be remapped and can handle pretty impressive power gains without any undue issues provided you shorten your service schedule.
Audi RS4 Wheel modifications.
Alloy wheels will help the brakes cool down and they are usually lighter than the steel ones. You alter your effective final drive ratio and this will have a detrimental effect on acceleration and performance. That’s the downside to large alloy wheels on your RS4. Although some individuals have gone larger we would adhere to a 17 inch rim size as being the maximum.
The RS4 is pretty heavy, even though Quattro drive system will make it feel very nimble and responsive you should always fit good quality tyres. Some RS4 owning TorqueCars members have rated the Goodyear Eagle F1 but tyre choice is subjective and we suggest you join our friendly forum where one can discuss RS4 tuning options in more detail.