Proton Suprima S Tuning

"Thank you for reading our Proton Suprima S tuning guide."

The Suprima S is a great project car to play with. The key to Suprima S tuning is finding the right mods you can waste loads of money if you do it wrong.

We outline options for your Suprima S tuning and report on the premier mods that work. Proton Suprima Ss offer good returns when tuned and with the ultimate enhancements you can definitely improve your driving fun.

Tuning tips and articles

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

 

Handling/Suspension upgrades

Handling modifications are often a priority for the Suprima S.

Putting some negative camber to the front and around 1 to 1.7 degrees of toe in to improve stability or toe out for better cornering, will radically improve your Suprima S in handling and cornering.

Drop the car optimally somewhere in the region of 22mm - 37 mm. and fit performance stiffer dampers, bigger drops will need other modifications in most instances.

Our aim in engine tuning should be to increase peak power at the top end.

With our articles your Suprima S can be a track day fun car and still be a reliable daily driver.

To be completely frank and honest, on the more modest engine sizes you are wasting your time spending money on modifications, so if this applies to you get yourself an engine swap then apply the following mods.

Power mods.

These mods tuning mods are usually installed by our members, decide how far you want to push your car before you get going.

There was only one engine option offered but it was designed by Proton and Lotus in collaboration 138 horsepower @ 5,000 rpm &  205 Nm of torque @ 2,000-4,000 rpm.

  • 1.6 L CamPro Turbo DOHC I4

Getting the best modified mods for your planned usage of the car is a time and money saver. Stage 3 competition upgrades just don't work well on the road hard to control in slow 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: Lighter flywheel, Sports exhaust, Alloy wheels, Remap, Suspension upgrade (drop 22mm - 37 mm.), Panel air filter.

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

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

You really need to keep as much low end torque as you can and aim to achieve a long power band rather than a narrow top end power hike.

In this article we shall give a brief overview 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 performance gains for your money as far as a bolt on upgrades goes on a NA (naturally aspirated) engine.

The intake and exhaust flow play a huge factor in your cars power band, but be careful here, getting this wrong can upset the idle and make the car impossible 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.

If you find you suffer from flat spots and power surges after your motorsport kits you should check the fuelling and try a higher octane fuel as well. Increasing the injectors is another beneficial modification and will deliver sufficient fuel.

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.

The next area for modification is the intake and exhaust. Contrary to popular belief there is generally a small power gain got by fitting an induction kit, they only become beneficial and are recommended after you increase the engines power to the point where the standard air intake box cannot cope!

Derestricting the air flow into the engine is the primary part of car tuners so get a better flowing air filter if you find that the car is running lean. Induction kits can sound sporty but due to the warm air in the engine bay they will not really increase power and more often than not rob you of power.

Do not go with the biggest exhaust you can find this will reduce the exhaust flow rate - the best for power gains are usually between 1.5 to 2.5 inches. It is the shape and material more than the bore size.

Getting the cylinder head gas flowed will allow you to get more air into each cylinder. This is definitely a job for a professional with a flow bench. A good multi plate fast road performance clutch will help to keep that power going where it should. Never make false economies or assume the standard clutch to cope. The best mods we recommend for your Suprima S are remaps, sports camshafts and induction improvements.

Remaps offer phenomenal power gains on all turbo charged cars. On NA (naturally aspirated) engines the benefits are doubtful. However a flashed ecu on a NA (naturally aspirated) engine will help unleash the potential if you have done a lot of mods. Adding forced induction will see large power gains but this is usually too expensive to be cost effective. Turbos are often harder to add than a supercharger. Turbos increase power in increasing proportion to increasing engine speed and this can make mapping difficult.

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 compression ratio of the engine .

Alloy wheel upgrades.

The benefits of alloy wheels include lowering your unsprung weight and better brake cooling via the extra air flow they allow. If you are serious about performance then you will need to carefully choose your tires - ideally with a track legal slick tire. Large Suprima S alloy wheels can decrease performance. If you get big alloy wheels you will be changing your final drive ratio.

Although some people have installed larger rims without issues we would restrict ourselves to a 16 inch rim size as the maximum.

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 Suprima S options in more detail with our Suprima S 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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