Modding uprating the Ford Duratec 33 engine!

Car tuning tips:Duratec 33 Modifications"

Duratec 33 Modifications Guide

How to modify and upgrade the Ford Duratec 33

"Comprehensive guide to tuning the Ford Duratec 33 engine!"

Popular tuning sites like TorqueCars often are getting posts asking about how to improve the Duratec 33 from people wanting to know what are the ultimate Duratec 33 power upgrades. So let us look into Ford Duratec 33 modifications and outline the best upgrades on this great engine and point out some problems along the way.

Now we shall review Duratec 33 tuning and summarise the ultimate modifications. Ford Duratec 33 are popular tuning projects and with a few sensible uprated parts like ECU maps, turbo upgrades and camshafts you will substantially maximize your driving experience.

The greatest Duratec 33 tuning parts on an engine are typically the ones that give the best power gain for your hard earned cash.

We won't be swayed by popular Duratec 33 tuning parts, they need to be cost effective.

Duratec 33  induction kits

Improving air intake on the Duratec 33

You need air matched to fuel 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 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 the primary aim to any engine upgrade job to shove more air and fuel into each cylinder but this has a knock on effect with the air flow sensor.

You'll commonly see there's a restriction in the air flow sensor AFM/MAP on the Duratec 33 when a lot 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 limited power at a much lower level.

Engines intake headers take the air from the air cleaner and allow it to be drawn into the engine cylinders.

Structure and rate of flow of the Air Intake manifolds can make a substantial difference to to fuel engine efficiency on the Duratec 33 .

Many mass produced engine intake are needing a performance upgrade, although some car makers provide well optimised intake.

Larger Duratec 33 valves, carrying out port work and head flowing will also lift torque, and as an added benefit will give you raising the torque increase on other upgrades.

Duratec 33 performance cam tips.

Each engine responds better to extreme cam durations so set your engine up on a rolling road.

The map and fuel pump and injectors also will say much on the bhp gains you'll get.

Extending exhaust or intake durations can alter the bhp 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 Duratec 33 can be made from camshaft upgrades. Changing the camshaft profile alters the intake and exhaust durations on the engine and can dramatically change the engines power and power output.

NB: Fast road camshafts commonly increase the performance over the rev band, you might lose a little bottom end power but your top end will be higher.

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

On a daily driver you need to optimize your power band to your driving style.

I would be surprised if you have found a Duratec 33 Motorsport and race camshaft is a pleasure to live with when driving in heavy traffic.

Stage 1, 2 and 3 mods for the Duratec 33

Before we break the best tuning upgrades down into stages of tune, let's list the most effective tuning upgrades for you.

  1. Suspension Upgrades - always improve your cars handling
  2. Brake Upgrades - Even before adding power improve those brakes
  3. Intake - make sure the intake is not restricted, use filters and intake upgrades to improve this
  4. Exhaust - as with 3 ensure there is not restriction in the exhaust, cats are the usual bottleneck
  5. Tunes - remapping, piggyback ECU's and aftermarket ECU's can all make decent gains
  6. Fuelling - when you've increased power you'll need to match this with more fuel
  7. Turbo upgrades - Improving the intake with a large turbo and better flowing intercooler will be the biggest power gain you'll see (but one of the most complex).

This video guide to tuning cars is a great starting point to work from in your project.

Stage 1 Duratec 33 parts:

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

Stage 2 Duratec 33 parts:

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

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

Stage 3 Duratec 33 parts:

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

The Duratec 33 engines make great tuning projects and we note that there are quite a few choices of mods and tuning parts about.

Remapping will help to establish the full potential of all the modifications you've done to your Duratec 33 .

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 modifications you've done and the condition of your engine.

Turbo modifications on the Duratec 33

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 Duratec 33 .

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

When an engine has forced induction tuning parts are going to make more power and turbocharged engines will have better components.

However every engines will have power limits

We recommend you find these limits and upgrade to better quality components to utilize the power.

It's not unheard of tuners spending a loads of money on turbo upgrades on the Duratec 33 only to suffer the indignity of watching the engine block literally blow up when it's first rolling road session.

Larger upgraded turbo units often experience a bottom end lag, and little turbo units spool up much more quickly but do not have the top end power band gains.

In the last 10 years the market of turbo chargers is always moving on and we commonly find variable vane turbo chargers, permitting the vane profile is altered according to speed to lower lag and increase top end torque.

Twin scroll turbo chargers divert the exhaust flow into a couple of channels and flow these at differently profiled vanes in the turbo. They also boost the scavenging effect of the engine.

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

Tips about fuel supply on the Duratec 33

You will need to ensure that the engine is not starved of fuel so must ramp up the fuelling when you start going beyond 20% of a torque hike. It makes sense to be generous with your injector capacity.

The rule of thumb is to add another 20% when specifying an injector, this allows for injector deterioration and allows a bit of 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 Duratec 33 performance exhaust upgrades

You only need to to replace your exhaust system with an upgraded one is if your current exhaust is actually creating a flow problem.

On most factory exhausts you'll find your flow rate is 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.

Please dont run with the largest exhaust you can buy this will slow up the exhaust flow rate - the best exhausts for power gains are usually between one and a half to two and half inches. Your exhaust design, the bend angles and construction are what have more effect on flow rates than your pipe width to a certain extent. So the exhaust design is a big factor.

Usual exhaust restrictions can be traced to the catalyst and filters installed, so adding a faster 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 Duratec 33

Like most engines an Duratec 33 , 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 Duratec 33 , failure to do this will exacerbate engine wear, on a tuned Duratec 33 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 Duratec 33 why not pop over to the forums at TorqueCars where you can chat about Duratec 33 tuning options and read about others projects who may be planning to do similar modifications on their Duratec 33 .

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