Modding and performance tuning parts for the Hyundai Delta engine!

Modifying and improving: "Delta Modifications"

Delta Modifications Guide

How to modify and upgrade the Hyundai Delta

"Comprehensive guide to tuning the Hyundai Delta engine!"

Sites like TorqueCars are frequently getting messages requesting info on how to improve the Delta from people inquiring about getting more power from the Delta and wanting to know what are the best tips for Delta power upgrades. So let us look into Hyundai Delta mods and outline the best upgrades on this great engine and point out some problems along the way.

Our aim here is to examine the options for your Delta tuning and outline the best modifications. Hyundai Delta are fantastic to work on and with the right tuning modifications like ECU maps, turbo improvements and camshafts you will definitely increase your driving experience.

When talking about the best parts for your Delta engine, we are going to focus on the upgrades that give the best power gain for you money.

Delta induction kits

Improving air intake on the Delta

You need fuel and air for an engine to work. If there is little supply of fuel then it will run lean, if there is insufficient air it runs rich sapping power and potentially damaging the engine. We'll pick up on fuelling later in this article but for now we shall look at air supply.

So the whole point to any engine tuning project to push air into each cylinder but this has a knock on effect with the air flow sensor.

You'll commonly see there is a limit in the air flow sensor AFM/MAP on the Delta when considerably more air is being drawn into the engine.

You'll see that 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor sapped performance at a much lower level.

Intake transmit the during the engines suck phase from the intake filter and allow it to be pulled into the engine cylinders with fuel for the squish phase.

The bore size, shape and flow characteristics of the air Intake manifold can make a big effect on to fuel atomisation and engine efficiency on the Delta.

On popular production engines intake are begging for a performance upgrade, although some makers provide decently flowing intake.

Fitting big valve kits, doing some port matching and head flowing will also raise torque, and importantly will afford you raising the torque increase on other mods.

Delta performance cam tips.

Each engine responds better to more aggressive cam durations check your engine on a rolling road.

The map and fuelling also will say much on the torque gains you'll make.

Altering valve durations can alter the torque band and on most engines the exhaust and intake durations do not need to match, although most cams and tuners use matched pairs there are some advantages to extending the intake or exhaust durations.

Significant air intake, and exhaust improvements on the Delta can be made from camshaft upgrades. Changing the camshaft profile alters the intake and exhaust durations on the engine and can dramatically change the power band and power output.

NB: Fast road cams tend to raise the bhp through the rpm band, you might lose a little low end power but your high end rpm power will be lifted.

Motorsport and race cams, raise the high end rpm power band but as a result the car will not idle smoothly and low end power nearly always suffers.

On a car driven daily you should ideally to optimize your torque band to your typical driving style.

I would be surprised if you find a Delta Motorsport camshaft is a pleasure to live with when on the daily commute.

Stage 1, 2 and 3 mods for the Delta

Stage 1 Delta parts:

Panel air filters, Intake headers, Remaps/piggy back ECU, Fast road camshaft, Drilled & smoothed airbox, Sports exhaust manifold.

Stage 2 Delta parts:

high flow fuel injectors, fuel pump upgrades, induction kit, Sports catalyst & performance exhaust, Ported and polished head, Fast road cam.

Stage 3 Delta parts:

Adding or Upgrading forced induction (turbo/supercharger), Twin charging conversions, Crank and Piston upgrades to alter compression, Competition cam, Engine balancing & blueprinting, Internal engine upgrades (head flowing porting/bigger valves).

The Delta engines make great tuning projects and we note that there is a lot of modifications and tuning parts about.

A remap allows a tuner to release the full potential of all the tuning mods you've done to your Delta.

Tuning tips and articles Engine tuning Transmission tuning Care care Intake & exhaust mods Improve handling Forums

You will typically expect to see gains of approximately 20-30% more power on turbocharged vehicles and you can expect to see around 15% on NASP engines, but power output usually vary depending on the tuning mods you've fitted and the condition of your engine.

Turbo modifications on the Delta

To get a turbo working on a NASP engine there is a lot involved, from lowering compression ratio to improved fuel supply and mapping, so we have found a great guide to helpavoid the common pitfalls or end up with an unfinished project because you were not told what you were getting into by doing this on the Delta.

The more air you can get into an engine, the more fuel it can burn and uprating the induction with a turbocharger upgrade makes impressive power gains.

If your car is turbo charged upgrades are simpler to install and turbo engines are built using strengthened components.

However engines will have power limits

See where you'll find these limitations and install more solid crank and pistons to handle the power.

We've seen drivers spending a lot of money on turbo upgrades on the Delta only to watch the engine block literally blow up when it's first rolling road session.

Bigger upgraded turbochargers will usually experience low end lag, and little turbochargers spool up much more quickly but won't have the peak rpm engines power gains.

In recent times the choice of turbo units is always evolving and we commonly find variable vane turbo units, where the vane profile is altered according to speed to lower lag and increase top end torque.

Twin scroll turbo units divert the exhaust gases into 2 channels and feed these at differently designed vanes in the turbo charger. They also help the scavenging effect of the engine.

Beefing up the air intake by adding a supercharger or additional turbo will help you achieve very large power gains, although more difficult to configure. We have this article on twincharging if you want to read more.

Tips about fuel supply on the Delta

Don't dismiss the need pay attention to the fuel system when you are increasing the bhp and torque - it makes the car more thirsty. Care modifiers usually say to be generous with your injectors flow rate.

The rule of thumb is to add 15% to the flow rate when buying an injector, which takes into account injector deterioration and gives a little spare capacity should the engine need more fuel.

Don't forget that different fuel grades will usually require different settings, a high octane fuel will burn more efficiently than lower octane fuel for example. A car will trim fuel supply to keep within the ideal air fuel mix but at the extreme ends you may need to adjust your injector capacity, or the mapping or you'll get flat spots and potential lean or rich fuel issues..

Recommended Delta performance exhaust upgrades

You only need to to improve your exhaust system with an upgraded one is if the existing exhaust is actually creating a restriction.

On most factory exhausts you'll find the flow rate is ok even on modest power gains, but on a serious tuning project with a big boost in power you will certainly need to get a better flowing exhaust.

Sports exhausts equal out the flow of air through the engine.

But if the exhaust is too big, ie: it's over two and a half inches diameter, you will lose much of the exhaust flow rate and end up lacking power and torque.

Usual exhaust restrictions come around the catalyst installed, so adding a faster flowing sports alternative will help avoid this restriction.

Catalyst removal (NB:catalysts reduce harmful engine emissions) is illegal in most countries and regions.

Faults issues and things to look out for on the Delta

Like most engines an Delta, should have few issues if it gets properly serviced and looked after.

We cannot stress enough the need for oil changes with the correct grade of oil on the Delta, failure to do this will exacerbate engine wear, on a tuned Delta this is more important than ever and close attention should be paid to your maintenance schedule.

If you are interested in learning more or getting impartial tuning advice for your Delta why not pop over to the forums at TorqueCars where you can chat about Delta tuning options and read about others projects who may be planning to do similar modifications on their Delta.

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