Power gain calculator:

Play with your Tuning tips for the Proton Mpi 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 tips for the Proton Mpi

Our guide will make your Mpi much better and more fun to drive!

Available in standard form with power of upto 90bhp (depending on the year), so this goes to show the tuning potential of the Mpi. From this you can increase the power from anywhere between 99bhp to 153bhp depending on how far you want to go. The larger power figure would need major work like a rebore, balancing, porting polishing and an agressive cam. It would also take a fairly hefty dose of forced induction.

The Car Tuning Guide suggest that if you have a lower powered version you should do an engine swap with a ’90bhp Mpi Saloons’. Car Tuning Guide think it is a shame that the Mpis were not offered with more powerful engine options, but this is where customisation comes in. Mpi tuning projects should generally start with some improvement to the intake/exhaust of the engine. So get a stainless steel exhaust and 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 Mpi responds reasonably well to a fast road cam which is one of the best value mods out there. Getting better flow through the head of the engine would reward your Mpi with more power and may actually give a little more economy. So get the engine head polished and ported.

The Mpis come in various power levels right up to 90bhp. If you apply a few tuning mods to this model of Mpi you will see power gains from anywhere between 99bhp to 126bhp. But this sort of power requires some pretty heavy investment and a hell of a lot of engine work. .

Adding forced induction will see big power gains but this is usually too expensive to be cost effective. Turbos are harder to add to a car than a supercharger. Turbos give boost in proportion to increasing engine speed and this can make mapping difficult. It is easier to map a supercharger because the boost is proportional to engine speed on a linear curve. Many Mpi owners improve the handling of their cars with slightly stiffer springs. Although lowering improves handling you should stick to a drop of 35mm.

We will be covering Mpi modifications in more detail in the future so plase bookmark this site and check back for regular updates.

These sites provide useful further reference on the mods we have recommended:
Modified Cars A look at some really nice modified cars and overview of car mods.

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