Hyundai Grandeur Tuning

"Ta for reading this Hyundai Grandeur tuning guide."

As a project vehicle, the Grandeur is excellent. The Grandeur may be awesome if you plan ahead, but don't be deceived; there are many motorsport-inspired modifications available that are entirely incompatible with it. firstly check out our impartial resources.

Here, we'll take a look at the most significant changes made by Grandeur tuning. If you choose the right upgrades for your Hyundai Grandeur, you will be able to expand your driving options.

Handling/Suspension upgrades

Improving the handling for people often first priority in your Grandeur tuning project.

If you set the toe out to 0.8 to 1.3 degrees on the front, and add a bit of negative camber then cornering will greatly improve.

We suggest that you fit sports suspension and lower the car by 27mm - 39 mm. Larger drops require arch work - especially on models already equipped with performance suspension.

Turning our attention to the Grandeur's engine we need to get a bit more power out of the top end.

The best power gains come from larger engine sizes. The more you start with the bigger the return on investment so engine swaps are good value mods for small engined cars.

Power mods.

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

2nd generation

• 2.0 L 6G71 V6
• 2.5 L 6G73 V6
• 3.0 L 6G72 V6
• 3.5 L 6G74 V6

3rd Generation

• 2.0 L Delta V6
• 2.5 L Delta V6
• 2.7 L Delta V6
• 3.0 L Sigma V6
• 3.5 L Sigma V6

4th Generation

• 2.4 L Theta II I4
• 2.7 L Mu V6
• 3.3 L Lambda V6
• 3.8 L Lambda  V6
  diesel:
• 2.2 L D4HB CRDI VGT I4

5th Generation

• 2.4 L Theta II I4
• 2.4 L Theta II hybrid I4
• 2.4 L Theta II GDI I4
• 3.0 L Lambda II V6
• 3.0 L Lambda II GDI V6
• 3.3 L Lambda II GDI V6
  diesel:
• 2.2 L D4HB CRDI VGT I4

6th Generation

• 2.4 L Theta II GDI I4
• 2.5 L Smartstream G2.5 GDI I4
• 3.0 L Lambda II  MPi V6
• 3.0 L Lambda II  GDI V6
• 3.3 L Lambda II  GDI V6
• 3.5 L Lambda II V6
  LPG:
• 3.0 L Lambda II  LPi V6
  diesel:
• 2.2 L D4HB CRDI I4

Getting the correct grade of performance upgrades for your planned usage of the car is essential. Stage 3 (competition) mods just won't work well on the road hard to control in slow traffic.

Please watch our video which covers the 5 principles of tuning your Grandeur. Be sure to keep up with our latest YouTube content and subscribe.

Best mods for your Grandeur

1. Fast road cams are are often the best upgrade for an engine, but they must be setup by someone who knows what they are doing and they are not always easy to source but you might find a local firm to regrind a stock camshaft.
2. Grandeur Handling Mods (suspension) - Fitting a more sporty Suspension kit radically improves your Grandeur handling Coilovers and Bushings are the usual go to mods
3. Head work - The goals of porting and flowing the head are to get air flowing into the engine while removing flow restrictions and turbulence.
4. Braking Mods - Improve your ability to stop ought to be listed in your priority list.
5. Engine Tunes - A Remapped Grandeur ECU provides the most advantage for the money, aftermarket ECUs, and piggyback ECUs are all alternatives.
6. Intake and Performance Exhausts - NB: 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.
7. Turbo upgrades - A New Turbo is the most efficient approach to increase air supply, allowing you to burn more fuel and make more power. Although one of the most costly upgrades it offers big gains.

Grandeur Tuning Stages

Typical stage 1 mods often include: Remap, Sports exhaust, Suspension upgrade (drop 27mm - 39 mm.), Alloy wheels, Panel air filter, Lighter flywheel.

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

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

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 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 modification.One of the most cost effective mechanical sports modifications you can do on your NA (naturally aspirated) engine is to fit a fast road cam .

The exhaust and intake valve durations play a huge role 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 reflashed ECU for the best performance gains.

Don't forget to ramp up the fuelling when you are increasing the power - it makes the car more thirsty.

Most power losses, flat spots and erratic idling after sports modifications are done can usually be traced to fuel delivery or timing issues. Uprating 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.

Grandeur Intake and Exhaust Tuning.

Now we move on to the intake and exhaust and ensure proper flow through the engine. Please note that WE DO NOT RECOMMEND INDUCTION KITS, unless you have tuned your car extensively 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.

Do not go with the biggest exhaust you can get this will slow the exhaust 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. 

Head work including a polish and port and 3 or 5 angle valve job will really help to release the potential of the engine.

A good triple plate fast road sports clutch will help to keep that power going where it should. Never make false economies or assume your standard OEM clutch to cope. The best mods we would do for your Grandeur are a tune/remap especially on a turbo, a fast road camshaft and sports exhaust, with a good air intake.

Remaps offer significant power gains on all turbo charged cars. On NA (naturally aspirated) engines the benefits are doubtful. However a chipped ECU on a NA (naturally aspirated) engine will help unleash the potential if you have done a lot of mods.

We've also come across some owners experimenting with twincharged applications and making some very high power gains.

Despite the large cost involved adding forced induction to a NA (naturally aspirated) engine will give large power gains. Superchargers are generally easier to add than turbos. It is harder to map a turbo as the boost increases exponentially with revs.

The nice directly proportional boost and rpm characteristics of the supercharger make them more straightforward to map. To cope with forced induction you will usually need to decrease the engine compression ratio .

Alloy wheel upgrades.

Because alloy wheels are lighter they improve performance and they will help to cool the brake disks. Further improvements can be made to your cars handling with the addition of directional tread pattern tire. Large Grandeur 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 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 Grandeur options in more detail with our Grandeur owners. It would also be worth reading our unbiased Hyundai tuning articles to get a full grasp of the benefits and drawbacks of each modification.

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