Modding uprating the AlfaRomeo Alfa V6 engine!

Car tuning tips:Alfa V6 Modifications"

Alfa V6 Modifications Guide

How to modify and upgrade the AlfaRomeo Alfa V6

"Comprehensive guide to performance tuning the AlfaRomeo Alfa V6 engine!"

TorqueCars are always getting emails asking how to improve the Alfa V6 from people inquiring about getting more power from the Alfa V6 and wanting to know what are the best Alfa V6 mods that work. So let us look into AlfaRomeo Alfa V6 upgrades and outline the best modifications on this great engine and point out some common pitfalls along the way.

Here we review Alfa V6 tuning and summarise the optimum modifications for your car. AlfaRomeo Alfa V6 have loads of potential and with a few sensible uprated parts like a remap, turbo upgrades and camshafts you will definitely maximise your driving pleasure.

The top Alfa V6 parts on an engine are sensibly the ones that give the best power gain for your hard earned cash.

We won't be swayed by popular Alfa V6 parts, they need to be cost effective.

Alfa V6 induction kits

Improving air intake on the Alfa V6

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

So the aim to any tuning task to force air and fuel into your Alfa V6 but this has a knock on effect with the air flow sensor.

It is common that there is a restriction in the air flow sensor MAF/MAP on the Alfa V6 when loads more air is being drawn into the engine.

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

Intake headers flow the air from the intake filter and allow it to be fed into the engine and mixed with fuel.

Design and flow rate of the Plenum can make a big difference to to fuel atomisation on the Alfa V6.

Many mass produced engine intake are in desperate need of aftermarket tuning parts, although a few makers provide fairly well optimized intake.

Larger Alfa V6 valves, getting 3 or 5 angle valve jobs and porting and head flowing will also raise bhp and torque, and more importantly will afford you raising the bhp and torque increase on other tuning parts.

Alfa V6 performance cam tips.

Some Alfa V6 engines respond better to mild camshaft durations so set your engine up on a rolling road.

The ecu map and fuelling also have an effect on the torque gains you'll get.

A longer valve duration 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.

The camshaft profile plays a big part in the engines power output so camshaft upgrades make quite a large difference. The intake and exhaust durations will alter depending on the chosen camshaft profile, so large engines power gains are on offer for camshaft upgrades.

NB: Fast road camshafts commonly push up the bhp over the rpm range, you may lose a little bottom end power but high end rpm power will improve.

Motorsport camshafts, push up the high end rpm power band but as a result the car will not idle smoothly and low end power nearly always suffers.

A Race camshaft won't do well if on the daily commute.

You should ideally optimize your engines power to your driving style so for a daily driver stick with a shorter duration Alfa V6 camshaft

Stage 1, 2 and 3 mods for the Alfa V6

Stage 1 Alfa V6 parts:

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

Stage 2 Alfa V6 parts:

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

Stage 3 Alfa V6 parts:

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

The Alfa V6 power plant are great to work on and thankfully there is a lot of modifications and performance parts out there.

Remaps helps unlock the full potential of all the tuning parts you've done to your Alfa V6.

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 may vary depending on the tuning parts you've applied and the condition of your engine.

Turbo modifications on the Alfa V6

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 Alfa V6.

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

If your motor has a turbo already fitted upgrades are simpler to install and you'll see that turbo engines already contain many forged and stronger components.

However you'll find engines will need better parts at higher power limits

We recommend you find these limits and install better quality crank and pistons to survive the power.

We see many drivers spending a a stack of money on turbo upgrades on the Alfa V6 only to suffer the indignity of watching the whole thing go up in smoke soon after it's used in anger.

Large turbo units tend to experience no power at low rpm, and little turbo units spool up really quickly but won't have the peak rpm engines power gains.

In the last 10 years the range of turbo chargers is always increasing and we commonly find variable vane turbo chargers, where the vane profile is altered according to speed to lower lag and increase top end power.

Twin scroll turbo chargers divert the exhaust flow into two channels and direct these at differently angled 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 bhp and torque gains, although more complex to install. We have this guide to twinchargers if you want to read more.

Tips about fuel supply on the Alfa V6

Don't forget to boost the fuelling when you are increasing the bhp and torque - it makes the car more thirsty. We strongly recommend you to be generous with your injectors flow rate.

As a rule of thumb add another 15% when fitting an injector, this allows for injector deterioration and gives 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 Alfa V6 performance exhaust upgrades

You may need to increase your exhaust system with an upgraded one is if your exhaust is creating a restriction.

On most factory exhausts you should find that the exhaust 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.

Sports exhausts can help increase the flow of air through the engine.

But if your exhaust is too big, ie: over two and a half inches diameter, you will lose a lot of the flow rate and end up sapping power and torque.

Usual exhaust restrictions can be located the catalysts installed, so adding a better flowing sports alternative will help avoid this restriction.

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

Faults issues and things to look out for on the Alfa V6

Like most engines an Alfa V6, 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 Alfa V6, failure to do this will exacerbate engine wear, on a tuned Alfa V6 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 Alfa V6 why not pop over to the forums at TorqueCars where you can chat about Alfa V6 tuning options and read about others projects who may be planning to do similar modifications on their Alfa V6.

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