Modding uprating the Volvo D4164T engine!

Tuning guide "D4164T Modifications"

D4164T Modifications Guide

How to modify and upgrade the Volvo D4164T

"Comprehensive guide to tuning the Volvo D4164T engine!"

Popular tuning sites like TorqueCars often are seeing threads requesting information on how to improve the D4164T from people wanting to know what are the best D4164T power upgrades. So let us look into Volvo D4164T parts and outline the best upgrades on this great engine and point out some frequent tuning mistakes along the way.

Let us provide a guide to D4164T tuning and outline the best mods that work. Volvo D4164T great bases for a tuning project and with the right tuning mods like a remap, turbo improvements and camshafts you will substantially improve your driving enjoyment.

When talking about the best parts for your D4164T engine, we are going to concentrate on the parts that give the biggest return for your cash.

D4164T induction kits

Improving air intake on the D4164T

You need air matched to fuel for an engine to work. If there is too little fuel then it will run lean, if there is not enough air it runs rich resulting in lost power . 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 modification project to get fuel and air into the D4164T engine but this has a knock on effect with the air flow sensor.

It is common that there is a limit in the air flow sensor AFM/MAP on the D4164T when considerably more air is being fed into the engine.

You'll see that 4 bar air sensors coping with quite large power gains, whereas the OEM air sensor was restricting bhp and torque at a much lower level.

Engines intake headers take the air during the suck phase from the filter and allow it to be fed into the engine and mixed with fuel.

Structure and flow rate of the Headers can make a noticeable effect on to fuel atomisation and engine efficiency on the D4164T.

It's not uncommon that intake headers are needing aftermarket tuning parts, although a few OEM provide decently flowing intake headers.

Fitting big valve kits, carrying out port matching and head flowing will also improve power, and as an added benefit will permit a greater power increase on other parts.

D4164T performance cam tips.

Some D4164T engines respond better to less aggressive cam durations check your engine on a rolling road.

The ecu map and fuelling also will make differences on the power gains you'll get.

Longer valve durations can alter the power 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.

Altering your D4164T cam will make a dramatic difference to the engine bhp. Choosing a higher performance cam profile raises the bhp accordingly.

NB: Fast road camshafts normally bump the bhp and torque across the rpm range, you may lose a little low end bhp but the top end will be better.

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

A Motorsport and race cam makes it harder when driving around busy urban areas.

You should ideally match your bhp range to your typical driving style so for a car used daily stick with a fast road D4164T cam

Stage 1, 2 and 3 mods for the D4164T

Stage 1 D4164T parts:

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

Stage 2 D4164T parts:

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

Stage 3 D4164T parts:

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

The D4164T units respond well to upgrades and we note that there are plenty of mods and performance parts about.

ECU mapping allows a tuner to release the full potential of all the upgrades you've done to your D4164T.

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 the outcome often vary depending on the upgrades you've applied and the condition of your engine.

Turbo modifications on the D4164T

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 D4164T.

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

When your motor is fitted with a turbo parts are relatively easy and most turbo charged engines use uprated components.

However most engines have limits

It is important to find these limitations and install better quality crank and pistons to survive the power.

It's not unheard of tuners spending a loads of money on turbo upgrades on the D4164T only to watch the engine catastrophically fail just after it's completed.

Bigger capacity turbo units commonly suffer no power at low rpm, and little turbo units spool up much more quickly but won't have the top end engines power gains.

Thankfully the choice of turbochargers is always developing and we are seeing variable vane turbochargers, permitting the vane profile is altered according to speed to lower lag and increase top end performance.

Twin scroll turbochargers divert the exhaust gases into a couple of channels and flow these at differently angled vanes in the turbo charger. They also improve the scavenging effect of the engine.

Beefing up the air intake by adding a supercharger or additional turbo will help you achieve very large bhp gains, although harder to setup. We have this feature on twinchargers if you want to read more.

Tips about fuel supply on the D4164T

Don't omit to raise the fuel system when you are increasing the bhp - it makes the car more thirsty. We would recommend you to over specify your flow rate on the injectors.

The accepted safe increase is to add 15% capacity when fitting an injector, helps cope with 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 D4164T performance exhaust upgrades

Only look to uprate your exhaust system with an upgraded one is if the existing exhaust is actually creating a restriction in flow.

On most factory exhausts you should find that the flow rate is still 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 will certainly help air flow out of the engine but do not go too large or you could will reduce the flow rate. Stick to one and a half to two and half inches for best results.

Typically exhaust restrictions come around the emissions filters installed, so adding a freer flowing high performance alternative will help avoid this restriction.

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

Faults issues and things to look out for on the D4164T

Like most engines an D4164T, 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 D4164T, failure to do this will exacerbate engine wear, on a tuned D4164T 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 D4164T why not pop over to the forums at TorqueCars where you can chat about D4164T tuning options and read about others projects who may be planning to do similar modifications on their D4164T.

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