Modding and performance tuning parts for the Volvo B6324S engine!

Modifying and improving: "B6324S Modifications"

B6324S Modifications Guide

How to modify and upgrade the Volvo B6324S

"Comprehensive guide to performance tuning the Volvo B6324S engine!"

Our friends at TorqueCars are frequently getting emails asking about how to improve the B6324S from people wanting to know what are the best tips for B6324S upgrades. So let us look into Volvo B6324S tuning mods and outline the best mods that work on this great engine and point out some problems along the way.

The Volvo B6324S offer good returns when tuned and with carefully picked modified tuning mods like a remap, turbo upgrades and camshafts you will really enhance your driving fun.

Our aim here is to look into B6324S tuning and show the greatest modifications for your car.

Just because particular parts are popular with B6324S owners it doesn't mean you should fit it, instead we will focus on the greatest parts that will give your B6324S the best power gain for you spend.

Without us subscribing to the popular myth of 'if it's shiny and makes more noise it must be good' you seem to get in many tuning magazines and on car forums'.

B6324S induction kits

Improving air intake on the B6324S

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 little flow 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 whole point to any engine tuning task to shove more air into the B6324S engine but this has a knock on effect with the air flow sensor.

It is common that there's a limit in the air flow sensor (AFM/MAF/MAP) on the B6324S when considerably more air is being drawn into the engine.

We note 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 air from the air filter and allow it to be drawn into the engine cylinders.

Structure and rate of flow of the Plenum can make a big effect on to fuel atomisation and engine efficiency on the B6324S.

On popular production engines air intake manifolds are in desperate need of motorsport parts, although some OEM provide decently flowing air intake manifolds.

Fitting big valve kits, getting B6324S port enlargement and head flowing will also lift bhp and torque, & more importantly will raise potential for a greater bhp and torque increase on other modifications.

B6324S performance cam tips.

Some B6324S engines respond better to different cam durations so set your engine up on a rolling road.

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

Altering 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 B6324S cam will make a dramatic difference to the engine engines power. Choosing a higher performance cam profile raises the engines power accordingly.

NB: Fast road cams tend to boost the torque across the rpm band, you may sacrifice a little low down bhp but the top end will be better.

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

For a daily driver you should ideally to match your torque band to your driving style.

I'd be surprised if you have ever thought a B6324S Motorsport cam is a pleasure to live with when driving around busy urban areas.

Stage 1, 2 and 3 mods for the B6324S

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 B6324S parts:

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

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

Stage 2 B6324S parts:

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

Stage 3 B6324S parts:

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

The B6324S power trains make great tuning projects and we're finding that there is a lot of modifications and tuning parts out there.

ECU mapping will help release the full potential of all the tuning mods you've done to your B6324S.

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 rely on the tuning mods you've applied and the condition of your engine.

Turbo modifications on the B6324S

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 B6324S.

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 your car has a turbocharger parts are relatively easy and you will discover turbo charged engines use strengthened components.

There are weak spots for every engine, with some being very over engineered and some just sufficiently able to handle stock power

Research these restrictions and upgrade to better quality components to utilize the power.

We've seen guys spending a loads of money on turbocharger upgrades on the B6324S only to suffer the indignity of watching the car catastrophically fail when it's been enthusiastically driven.

Big upgraded turbo chargers commonly suffer a bottom end lag, and low capacity turbo chargers spool up more quickly but do not have the peak rpm torque gains.

Over the last 20 years the range of turbos is always evolving and we now see variable vane turbos, allowing the vane profile is altered according to speed to lower lag and increase top end bhp.

Twin scroll turbos divert the exhaust flow into 2 channels and push these at differently designed vanes in the turbocharger. They also increase 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 get working. We have this feature on twinchargers if you want to read more.

Tips about fuel supply on the B6324S

You will need to ensure that the engine is not starved of fuel so should uprate the fuelling when you start going beyond 20% of a torque hike. Don't forget to be generous with your flow rate on the injectors.

The accepted safe increase is to add 15% when specifying an injector, which takes into account injector deterioration and affords you some spare capacity should the engine require 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 B6324S performance exhaust upgrades

You only need to to increase your exhaust system with an upgraded one is if your exhaust is actually creating a restriction in flow.

On most factory exhausts you'll find the exhaust flow rate is fine 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 usually air flow from the engine but do not go too big or you could will reduce the flow rate. Stick to one and a half to two and half inches as a rule of thumb.

Typically exhaust restrictions can be traced to the filters installed, so adding a better flowing race 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 B6324S

Like most engines an B6324S, 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 B6324S, failure to do this will exacerbate engine wear, on a tuned B6324S 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 B6324S why not pop over to the forums at TorqueCars where you can chat about B6324S tuning options and read about others projects who may be planning to do similar modifications on their B6324S.

We need your help to complete and improve this page, so do give us your feedback in the comments box below.

We want to know your experiences with parts on your B6324S, it helps us improve our tips and keeps us current so please use the comments box to drop a tip.

If you liked this page please share it with your friends, drop a link to it in your favourite forum or use the bookmarking options to save it to your social media profile.

Check out TorqueCars new YouTube channel, and see their awesome new content...


Please use our forums if you wish to ask a tuning question, and please note we do not sell parts or services, we are just an online magazine.

Help us improve, leave a suggestion or tip

Your Constructive comments on this article