Tuners tips on "ZD30DDTi Modifications"

ZD30DDTi Modifications Guide

How to modify and upgrade the Nissan ZD30DDTi

"Comprehensive guide to performance tuning the Nissan ZD30DDTi engine!"

Popular tuning sites like TorqueCars are regularly seeing threads asking how to improve the ZD30DDTi from people wanting to know what are the best ZD30DDTi modifications. So let us look into Nissan ZD30DDTi modifications and outline the best modifications on this great engine and point out some potential pitfalls along the way.

The Nissan ZD30DDTi offer good returns when tuned and with a few sensible modified tuning mods like remaps, turbo kits and camshafts you will really increase your driving enjoyment.

Car Tuning Tips will detail the best approach to ZD30DDTi tuning and highlight the best modifications.

The ultimate ZD30DDTi mods on an engine are in our opinion the ones that give the best gains for your money.

We won't be swayed by popular ZD30DDTi mods, they need to be cost effective.

ZD30DDTi induction kits

Improving air intake on the ZD30DDTi

You need fuel and air for an engine to work. If there is a lack of fuel then it will run lean, if there is not enough air it runs rich resulting in lost 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 Pushing air and fuel into each cylinder is the main goal to any engine modification task.

You'll commonly see there's a restriction in the air flow sensor (AFM/MAF/MAP) on the ZD30DDTi when a lot more air is being sucked into the engine.

We see 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor sapped bhp and torque at a much lower level.

Intake transmit the on the suck phase from the air filter and allow it to be drawn into the engine and mixed with fuel.

Design and rate of flow of the Intake headers can make a large change to fuel engine efficiency on the ZD30DDTi.

Commonly we find the intake headers are ripe for aftermarket tuning parts, although a few makers provide reasonably well designed intake headers.

Adding a ZD30DDTi larger valve kit, carrying out ZD30DDTi port enlargement and head flowing will also improve power, & importantly will give you increasing the power increase on other modifications.

ZD30DDTi performance cam tips.

Some ZD30DDTi engines respond better to less aggressive cam durations check your engine on a rolling road.

The ECU mapping and injectors and fuel pump also will make differences on the torque gains you'll make.

Longer 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 ZD30DDTi can be made from cam upgrades. Changing the cam profile alters the intake and exhaust durations on the engine and can dramatically change the torque and power output.

NB: Fast road camshafts tend to bump the torque throughout the rpm band, you could sacrifice a little low end power but top end will be higher.

Motorsport camshafts, bump the top end band but as a result the car will not idle smoothly and low end power nearly always suffers.

In a road car you must carefully try to optimize your torque band to your cars usage.

I'd be shocked if you have ever thought a ZD30DDTi Competition cam is a pleasure to live with when driving around busy urban areas.

Stage 1, 2 and 3 mods for the ZD30DDTi

Stage 1 ZD30DDTi parts:

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

Stage 2 ZD30DDTi parts:

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

Stage 3 ZD30DDTi parts:

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

The ZD30DDTi units are fantastic to work on and thankfully there are plenty of mods and tuning parts out there.

Remapping will help unlock the full potential of all the upgrades you've done to your ZD30DDTi.

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 your mileage often vary depending on the upgrades you've fitted and the condition of your engine.

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

Turbo modifications on the ZD30DDTi

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 ZD30DDTi.

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

If the engine has forced induction upgrades are going to make more power and most turbo charged engines are made using uprated components.

However you will find an engines have limits

We recommend you find these restrictions and upgrade to stronger pistons, crank and engine components to survive the power.

We see many car owners spending a lot of money on turbo charger upgrades on the ZD30DDTi only to experience the motor throw a rod just after it's been completed.

Bigger capacity turbo units commonly suffer no power at low rpm, and low capacity turbo units spool up quickly but won't have the peak rpm bhp gains.

In the last 10 years the range of turbochargers is always improving and we commonly find variable vane turbochargers, where the vane angle is altered according to speed to lower lag and increase top end bhp and torque.

Twin scroll turbochargers divert the exhaust gases into two channels and push these at differently designed vanes in the turbocharger. 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 performance gains, although harder to configure. We have this feature on twinchargers if you want to read more.

Tips about fuel supply on the ZD30DDTi

You will need to ensure that the engine is not starved of fuel so need to pay attention to the fuelling when you start exceeding 20% of a performance hike. We would recommend you to be generous with your flow rate on the injectors.

As a rule of thumb add 20% to the flow rate when specifying an injector, this takes into account injector deterioration and provides you some 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 ZD30DDTi performance exhaust upgrades

Only look to upgrade your exhaust system with an upgraded one is if the existing exhaust is actually creating a flow problem.

On most factory exhausts you'll see your flow rate is still good 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 pipe is too large, ie: over two and a half inches diameter, you will lose much of the exhaust flow rate and end up lacking power and torque.

The usual suspects causing problems in your exhaust flow rate are in the catalyst and filters installed, so adding a better flowing sports alternative will help avoid this restriction.

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

Faults issues and things to look out for on the ZD30DDTi

Like most engines an ZD30DDTi, 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 ZD30DDTi, failure to do this will exacerbate engine wear, on a tuned ZD30DDTi 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 ZD30DDTi why not pop over to the forums at TorqueCars where you can chat about ZD30DDTi tuning options and read about others projects who may be planning to do similar modifications on their ZD30DDTi.

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