Proton Wira Tuning

"Thanks for reading this Proton Wira tuning guide."

The Wira is a brilliant car modification project to execute. The key to Wira tuning is getting the right mods - a lot of money can be wasted if you do it wrong.

We consider Wira tuning and show the best modifications for your car. Proton Wiras have loads of potential and with the best modified upgrades you can dramatically increase your driving fun.

Tuning tips and articles

Engine tuning Transmission tuning Care care Intake & exhaust mods Improve handling Forums

Handling/Suspension upgrades

Improving the handling for lots of DIY modders first priority in your Wira tuning project.

Putting some negative camber at the front and a degree or two of toe in to improve stability or toe out for better cornering, will radically enhance your Wira in handling and cornering.

We would go to a maximum drop of 28mm - 44 mm. on most models. You risk grounding out if you go lower than this.

A nice wide torque band and sweet spot of peak power at one third of your RPM range is optimum.

Following our guidance for tuning your Wira you will make a practical but scorching car that will potentially out perform bigger cars.

Smaller engines do not provide much of a return in terms of power so start with a bigger engine. Engine swaps are a good option if you have a small engine size.

Engine Tuning.

These mods performance mods are usually installed by our members, decide how far you want to go before you get started.

  • 1.3L 4G13P
  • 1.5L 4G15P
  • 1.5L 4G91x
  • 1.6L 4G92P
  • 1.8L 4G93P
  • 2.0L 4D68x

Getting the correct grade of sports upgrade kits for your planned usage of the car is vital. Stage 3 competition upgrades just won't work well on the road difficult in stop start traffic.

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Best Engine Mods for your car

  1. Mapping - remapping provides the most advantage in terms of cost savings,  aftermarket ECUs, and piggyback ECUs are all alternatives.
  2. Fast road cams are one of the most significant mechanical changes, but they must be installed by someone who knows what they're doing and they are not always easy to source but you might find a local firm to regrind a stock camshaft.
  3. Intake and Exhaust - Note that on their own these mods will NOT ADD POWER in most cases, but they can help enhance power after other mods by removing the restriction.
  4. Upgrades to turbochargers and superchargers - forced induction is the most efficient approach to increase air supply, allowing you to burn more fuel and make more power. It is one of the most costly upgrades but provides the best gains.
  5. Head work - The goals of porting and flowing the head are to get air flowing into the engine while removing flow restrictions and turbulence.

Typical stage 1 mods often include: Suspension upgrade (drop 28mm - 44 mm.), Alloy wheels, Panel air filter, Sports exhaust, Remap, Lighter flywheel.

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

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

Peak power is good on competition cars but for a drivable and fun car you need a wide torque band and perhaps extending the rev range.

In this article we shall give your a good starting base to the best modifications for your car, but we'd encourage you to spend some time on the site looking into the details of each type of performance mod.Fast road cams offer one of the biggest torque gains for your money as far as a single tuning modifications goes on a NA (naturally aspirated) engine.

The intake and 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 awkward to drive in traffic. You'd need to follow a camshaft upgrade with other mods and finish with a performance chip to fully release the power gain.

You will need to ensure that the engine is not starved of fuel so will need to look at the fuelling.

Using higher octane petrol is another option if you find you are suffering from detonation or premature ignition on your Proton project after fitting other performance modifications. To get sufficient fuel you may need to upgrade the injectors on your engine.

A fuel pump will only deliver a finite amount of fuel, so you may need to uprate this if your injectors are demanding more fuel.

Intake and Exhaust Tuning.

Now we move on to the intake and exhaust and ensure proper flow through the engine. Contrary to popular belief there is generally very little if any power gain obtained by fitting an induction kit, they only work well and are recommended after you boost the engines power to the point where the standard air intake box cannot cope!

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 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 do not go too large or you might just stuff your flow rate and make things worse. So generally speaking, keep to a size of 1.5 to around 2.5 inches to maximise flow rates, and this should take into account the amount of air your engine is moving.

Airflow through the head can be dramatically increased with some professional flowed (porting and polishing). These should match and be setup to take into account any other engine mods. A good heavy duty fast road performance clutch will help to keep that power going where it should. Never cut corners or assume a standard OEM clutch to cope. The best mods in our opinion for your Wira are Remapping or piggy back ecu, fast road cam and air intake and exhaust.

Turbo engines are just asking to be remapped. You will see impressive power gains on most modern turbo engined cars including diesels making a remap one of the most cost effective and impressive modifications for your money.The most significant power gains for NA (naturally aspirated) engines usually involve the addition of forced induction. It is generally easier to bolt on a supercharger than it is to install a turbo. With a turbo the boost curve is related exponentially to the engine speed making it difficult to map fuelling with.

Superchargers will give a boost which is proportional to engine speed so is simpler. Decreasing the engines compression ratio will allow you to add forced induction, water injection may also help prevent detonation.

Alloy wheel upgrades.

The benefits of alloy wheels include reducing your unsprung weight and more efficient brake cooling via the extra air flow they allow. Pay attention to your choice of tyres (tires) for your car, a good directional tread pattern tire can really enhance your cars handling. The drawback to large alloys on your Wira is that you're altering your final drive ratio so this will have a detrimental effect on acceleration and performance.

For this reason aim to keep the overall rolling diameter of the wheel the OEM setup. In all cases avoid going larger than 16 inches.

If you would like to know more, or just get some friendly advice on Tuning your car please join us in our friendly forum where you can discuss Wira options in more detail with our Wira owners. It would also be worth reading our unbiased Proton tuning articles to get a full grasp of the benefits and drawbacks of each modification.

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