Power gain calculator:

Play with your Tuning guide for the Renault 18 options below and see which mods give you the best power gain.


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if you want to calculate your 1/4 mile times from the bhp.

Tuning guide for the Renault 18

The Car Tuning Guide look at the 18 tuning options. Which are the best modifications for the 18. On practically all cars from Renault, you will see performance gains from some weight reduction. If you can shed a few hundred KG’s off your 18 you will get a much better return on your tuning investment. 18 tuning projects should generally start with some improvement to the intake/exhaust of the engine. So get a good quality sponge or cotton gauze panel air filter. A good fuel pressure regulator will up the throttle response. The next level of modifications involve taking more aggressive action. The 18 responds reasonably well to a fast road cam which is one of the best value mods out there.

NOTE: POWER GAINS ARE PROPORTIONAL TO YOUR BASE POWER. The more you start with the better your gain will be. Don’t waste time on small engines – do a swap. Turn your attention next to the 18s engine head. With a good gas flowed ported engine you will see much better mid and peak range power and some owners have reported more economy. Many 18 owners improve the handling of their cars with slightly stiffer springs. A drop of 35mm will work well on most cars, any lower and you will hit other problems.

Check back frequently for updates as we will be adding more detailed tuning guides to this site.

These sites provide useful further reference on the mods we have recommended:
Car Tuning Great guide on just about every car modification around.
Car Tuning Tips
Kent modified car show. One of the biggest modified car shows around.

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