Peugeot 407 Tuning
"Tuning up the 407"
We look at 407 tuning and summarise the best modifications for this popular family car. Overall the Peugeot 407s are good project cars and with a few sensible performance tuning mods you can dramatically maximise your driving enjoyment.
They may be overlooked by many as Family or executive cars but they are great to drive and make superb sleepers if you do the right mods to them.
We have seen some awesome 407 tuning projects and there seems to be quite a loyal fan base of 407 owners. With the right mods your 407 can be transformed into a fun car. Don't waste money, do your homework and follow our unbiased guides to each performance upgrade to avoid disappointment.
Many 407 owners uprate the handling of their cars as a priority, this will certainly increase your enjoyment of the car. We would go to a maximum drop of 35mm on most models. You risk rubbing on the arches if you go lower than this.
Top end power should be your overall aim on the 407 with a nice fat peak torque band.
The best power gains come from larger engine sizes. The more you start with the bigger the return on investment so engine swaps are good value mods for small engined cars.
These mods are usually performed by our members, decide how far you wish to go in your tuning project before you begin.
Getting the best mods for your planned usage of the car is essential. Stage 3 competition upgrades just don't work well on the road as it makes the car hard to control in slow traffic.
Stage 1 mods:alloy wheels,Remap,lighter flywheel,suspension upgrade (drop 30-40mm),sports exhaust,Panel air filter.
Stage 2 mods:fuel injector & fuel pump upgrades,Ported and polished head,power clutch,Fast road cam,.
Stage 3 mods:Engine balancing,sports gearbox, competition cam,adding or upgrading forced induction (turbo/supercharger),Internal engine upgrades (pistons/head/valves).
Peak power is nice in motorsport but for a driveable and fun car you need a long power band and perhaps extending the rev range. In this article we shall give your a good starting base to the best mods for your car, but we'd encourage you to spend some time on the site looking into the details of each type of performance part.The intake and exhaust durations play a large part in your cars power band, but be careful here, getting this wrong can upset the idle and make the car hard to drive in traffic. You'd need to follow a cam upgrade with other mods and finish with a remap for the best performance gains.Don't forget to uprate the fuelling when you are increasing the power - it makes the car more thirsty. Frequently power losses, and erratic idling after mods are done can usually be traced to timing or fuelling issues.Uprating the injectors is another beneficial modification and will deliver sufficient fuel. Uprate the fuel pump to cope with the extra fuel requirements of your tuned 407s uprated injectors.
Intake and Exhaust Tuning.
Breathing mods are usually next up. Contrary to popular belief there is usually very little power gain to be had by fitting an induction kit, they only work well and are recommended after you increase the engines power to the point where the standard air intake box cannot cope! Induction kits can work well on turbo engines and larger engines (if supplied with a suitable cold air feed or air box), generally though we'd just recommend for 407 engines you should just fit a sports panel air filter prefereble made from cotton.
Do not go with the widest exhaust you can buy this will reduce the exhaust flow rate - the best exhausts for power gains are usually between 1.5 to 2.5 inches. It is the shape and material more than the bore size.
Getting a professionally flowed (ported and polished) head with larger valves can fully release the engines power. Your clutch can seriously let you down if it starts to fail and the standard clutches are only ever good for power gains of upto 50%. Fit an upgraded clutch to avoid power leak through the transmission. Remaps offer impressive power gains on all turbo charged cars. On NASP engines the benefits are doubtful. However a remapped ECU on a NASP engine will help unleash the potential if you have done a lot of mods. Adding forced induction will see phenomenal power gains but this is usually too expensive to be cost effective. It is generally easier to bolt on a supercharger than it is to get a turbo working. Turbos give boost in exponential proportion to increasing engine speed and this can make mapping difficult. Superchargers however will give a boost which is proportional to engine speed so is easier to map. Alternatively you could add water injection to control knock.
Alloy wheel upgrades.
The benefits of alloy wheels include a lower unsprung weight and more efficient brake cooling. The downside to large alloy wheels on your 407 is that you alter your effective final drive ratio and this will have a detrimental effect on acceleration and performance. For this reason we would advise sticking to a maximum wheel size of 18 inches, although we know some of our members have gone larger than this with no problems.
For more information on Tuning your car please join us in our friendly forum where you can discuss 407 options in more detail with our 407 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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