Peugeot 307 Tuning
"Getting the most from your 307"
A popular family car the 307 replaced the 306 and was an instant success. The standard car can be greatly improved though with the right mods and we will look at various handling and engine modifications to allow you to create your perfect car.
Peugeot 307s certainly make for a good tuning project and with the right performance modifications you can dramatically maximise your driving pleasure.You can do a lot to improve the performance of your 307 with our step by step tuning tips. Sit down first and research 307 tuning to avoid making the usual costly slip ups we see.
Handling modifications are usually your first port of call for the 307. Drop the car by as much as 35mm and fit stiffer dampers, bigger drops will need other modifications in most instances.
Top end power should be your overall aim on the 307 with a nice fat peak torque band.
Sadly with smaller engine sizes you are wasting your time spending money on modifications, so if this applies to you get yourself an engine swap then apply the following mods.
These are the mods that are usually performed by our members, decide how far you wish to go in your tuning project before you start.
Getting the best mods for your planned usage of the car is a time and money saver. Stage 3 motorsport parts just don't work well on the road difficult in stop start traffic.
Stage 1 mods:lighter flywheel,Remap,Panel air filter,sports exhaust,alloy wheels,suspension upgrade (drop 30-40mm).
Stage 2 mods:power clutch,Ported and polished head,fuel injector & fuel pump upgrades,Fast road cam,.
Stage 3 mods:sports gearbox,Internal engine upgrades (pistons/head/valves),Engine balancing,adding or upgrading forced induction (turbo/supercharger), competition cam.
Peak power is all well and good but for a driveable and fun car you need a long power band and perhaps extending the rev range. The whole point of this article is to give a starting base of car tuning performance parts and point you in the right direction, our forum is the place to go for detailed advice and tips on your project and all aspects of modding cars.
It maximises the intake and exhaust durations and increases the power if done right. Ideally you'd add other mods and finish up with a performance chip. We'd also caution you not to go with a motorsport cam as this affects the engines idling and general town driving characteristics.When pushing up the power you will need to pay attention to the fueling.
More power needs more fuel. Most power losses, flat spots and erratic idling after modifications are done can usually be traced to timing or fueling issues.Uprated injectors will enable you to supply sufficient fuel to the engine. Uprate the fuel pump to cope with the extra fuel requirements of your tuned 307s uprated injectors.
Intake and Exhaust Tuning.
The next area for modification is the intake and exhaust. Induction kits only help to add performance if your air intake is struggling!
Adding an induction kit to most standard engines will see NO POWER GAIN AT ALL. If you have heavily modified your engine and it's need for air INCREASES DRAMATICALLY then an induction kit is the answer and will help remove this restriction. Maximum power gains come from a full induction kit with a cold air feed on heavily tuned engines, this can be sited within an air box but a performance panel filter should suffice for most applications. TorqueCars suggest you use a panel air filter as these are easy to clean and maintain and generally perform better than paper ones.
Sports exhausts will certainly help air flow out of the engine but do not go too large or you may end up will reduce the flow rate. Stick to 1.5 to 2.5 inches as a rule of thumb.
Getting the head ported and polished will further help more air into each cylinder. This is definitely a job for a professional with a flow bench. A good multi plate fast road sports clutch will help to keep that power going where it should. Never skimp or expect a standard clutch to cope.
Remaps offer large power gains on all turbo charged cars - the turbo diesel engines respond very well to remaps and can totally transform the cars performance.
On NASP engines the benefits are doubtful. However a remap on a NASP engine will help unleash the potential if you have done a lot of mods. The most significant power gains for NASP engines usually involve the addition of forced induction. Superchargers are often easier to add than a turbo. With a turbo the boost curve is related exponentially to the engine speed making it hard to map. It is easier to map a supercharger because the boost is proportional to engine speed on a linear curve. To cope with forced induction you will usually need to decrease the compression ratio of the engine.
Alloy wheel upgrades.
Alloy wheels will help the brakes cool down and are usually lighter than the steel ones. The downside to large alloy wheels on your 307 is that you alter your effective final drive ratio and this will have a detrimental effect on acceleration and performance. Although some people have gone larger we would stick to a 18 inch rim size as the maximum.
For more information on Tuning your car please join us in our friendly forum where you can discuss 307 options in more detail with our 307 owners. It would also be worth reading our unbiased Peugeot tuning articles to get a full grasp of the benefits and drawbacks of each modification.
Please help us improve these tips by sending us your feedback in the comments box below. We love to hear what our visitors have got up to and which mods work best for them on each model of car. Comments are used to improve the accuracy of these articles which are continually updated.
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