Audi A8 Tuning

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We examine A8 tuning and provide tips on the ultimate upgrades. Audi A8s are fantastic to work on and with the right uprated tuning mods you can really increase your driving experience.

One of the greatest cars Audi have ever produced boasting a stunning range of refined and powerful engine options.

When it comes to A8 tuning options a lot depends on what you want from the car. For most a regular power increase is all that is desired and the best way to get this is from a remap.

Remapping the ECU on the TD engines will unleash a mountain of extra torque, give better fuel economy and make the car much better to drive. The NASP turbo engines will typically give around an extra 10% of power from a remap and the petrol Turbo engines give phenomenal power gains in the order of 30% from a remap.

Increasing the torque and bhp are the common aims of A8 owners. A remap will enable you do this and is one of the simplest and easiest ways to get a power gain.

The best power gains come from larger engine sizes so go with the V6 FSi or the V8, V10 or the stunning W12 engines. The more you start with the bigger the return on the tuning investment so engine swaps are good value mods if you have the 2.8 V6.

Audi A8 Tuning modifications.

This list of the stages and tuning upgrades are usually carried out by our members, decide how far you want to push your car before you get going.

Getting the right performance upgrades for your planned usage of the car is a time and money saver. Stage 3 (competition) mods just don't work well on the road and will make the car undrivable.

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Guide to the Best Tuning Mods & Upgrades

  1. Mods that Remove a Restriction

    If the intake or exhaust are restricted in any way this will have an impact on your cars performance, so use an induction kit/filter upgrade and better flowing exhaust whenever your tuning creates a flow restriction.

  2. Mods that Improve Handling

    Braking, Suspension and general alignment of the suspension components is vital for any tuning project even before you start increasing power.

  3. Fit Stronger Parts

    Tuned cars will show up weaknesses, typically in the turbochargers, clutch and internal engine components. Whilst most engines can cope with mild tuning mods, TorqueCars recommend that you upgrade the internal components before these weak spots manifest themselves.

  4. ECU Tunes & Remapping

    While some cars can be easily remapped, others may require piggyback ECU's or aftermarket ECU's but this is the most vital step of your tuning project as it fully releases the power from all of your mods and upgrades. Expect 10-20% on NASP engines and 30-40% on turbocharged units.

  5. More Power Needs More Fuel & Air

    Every tuning project will aim to increase the air supply, but fuel supply is just as vital and will need to match the air the engine can utilise. Fuel to Air ratio is vital so upgrade the fuel pump & injectors. Also you can look to perform head mods (flowing and porting), bigger valves, fast road cams and forced induction upgrades to improve fuel.

Stages of Tune

Stage 1 mods: Alloy wheels, Suspension upgrade (drop 30-40mm), Lighter flywheel, Sports exhaust, Panel air filter, Remap.

Stage 2 mods: Ported and polished head, Power/Sport clutch, Fast road cam, high flow fuel injector, fuel pump upgrades.

Stage 3 mods: Internal engine upgrades (pistons/head/valves), Adding or upgrading forced induction (turbo/supercharger), Sports gearbox, Competition cam, Engine balancing.

Peak power is nice in motorsport but for a daily driven car you need a wide torque band and perhaps extending the rev range.

In this article we shall give a brief overview to the best mods for your car, but we'd encourage you to spend some time on the site looking into the details of each type of performance upgrade.Fast road cams offer one of the biggest performance gains for your money as far as a bolt on modified parts goes on a NASP engine.

The intake & exhaust durations play a large part in your cars power band, but be careful here, getting this wrong can upset the idle and make the car difficult to drive in traffic. You'd need to follow a cam upgrade with other mods and finish with a remap for the best performance gains.

When pushing up the power you will need to uprate to the fuelling. More power needs more fuel.

If you find you have flat spots and power surges after your mods you should check the fuelling and try a higher octane fuel as well. Upgrading the injectors is another beneficial modification and will deliver sufficient fuel.

If you are increasing your fuelling with bigger injectors you will also need to get a bigger fuel pump to supply it.

Intake and Exhaust Tuning.

Breathing mods are usually next up. Please note that WE DO NOT RECOMMEND INDUCTION KITS, unless you have tuned your car with over 30 percent more power and are finding that the standard air intake has become the bottleneck.

Maximum power gains come from a full induction kit with a cold air feed on heavily tuned engines, this can be sited within an air box but a performance panel filter should suffice for most applications. TorqueCars suggest you use a panel air filter as these are easy to clean and maintain and generally perform better than paper ones.

Sports exhausts generally help improve air flow through the engine but avoid an exhaust that is too wide or you may end up will reduce the flow rate. Stick to 1.5 to 2.5 inches as a rule of thumb.

Getting a professionally ported and polished head with larger valves can fully release the engines power. When you start tuning your A8 you will find that the standard clutch starts to suffer so get an uprated clutch. The best mods that we recommend for your A8 are fast road camshaft, remap, induction and exhaust, suspension.

Turbo engines are just begging to be Remapped. You will see massive power gains on most modern turbo charged cars including diesels making a remap one of the most cost effective and massive modifications for your money.Adding forced induction will see massive power gains but this is usually too expensive to be cost effective. Turbos are often harder to add than a supercharger. It is harder to map a turbo as the boost builds exponentially with revs.

It is more straightforward to map a supercharger because the boost is correlating to engine speed on a linear curve. To cope with forced induction you will usually need to decrease the engine compression ratio .

Handling/Suspension upgrades

Handling modifications are the thing most do first for the A8.

Good suspension tweaks that dramatically enhance handling for the A8 include a couple of degrees negative camber and 1-1.5 degrees of toe out on the front wheels.

Drop the car by as much as 29mm - 35 mm and fit uprated stiffer dampers, bigger drops will need other modifications in most instances.

A8 alloy wheel upgrades.

Alloy wheels can help the brake cooling and are usually lighter than steel ones. Don't forget that your choice of rubber greatly affects your cars grip and handling. It is not worth compromising performance with cheap tyres when you can buy directional tread pattern performance tyres.Large A8 alloys can decrease performance. If you get big alloys you will be changing your final drive ratio.

Although some people have fitted larger wheels without issues we would stick to a 18 inch rim size as the maximum.

There is a more updated version of this Audi A8 Tuning article on TorqueCars.com.

For more information on Tuning your car please join us in our friendly forum where you can discuss A8 options in more detail with our A8 owners. It would also be worth reading our unbiased Audi tuning articles to get a full grasp of the benefits and drawbacks of each modification.

We need your help improving this article, so please send us your feedback in the comments box below and pass on any tips, points or facts we have wrong or have not covered.

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All of your comments are used to improve the accuracy of these articles which are continually revised, tweaked and updated.

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