911 Tuning

"The Real Porsche."

The 911 represents the epitome of everything Porsche.

With the right mods you can improve the already impressive 911 and shave precious seconds off your lap times.

One of the most reliable supercars around thanks to the impeccable German engineering it is loved by prestige fleet hire companies and city brokers alike.

You buy into a lifestyle when you get a 911, and you certainly get one hell of a car.

The 911 has enjoyed a long production run, giving Porsche time to perfect the engineering. Companies like RUF have come along and taken the 911 to new levels. The performance is certainly matched by the handling.

Because the styling has changed little over the years you get the same emotional response from a classic 911 that you get looking at the latest one in the showroom. Some of our members have used Porsche engines in other projects including a Morris Minor and a number of Classic VW Beetles.

Tuning tips and articles

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The 911 captured the imagination of the city brokers in the 1980 and is one of the most reliable supercars around.

The engines were built for power and the sheer reliability of the engine indicates that although powerful, Porsche were playing it safe with the power figures. So what should be on your 911 tuning projects parts list?

The following modifications are usually performed by our members, decide how far you want to go before you begin.

Getting the right mods for your planned usage of the car is vital. Stage 3 (competition) mods just don't work well on the road.

Stage 1 mods: Exhaust, Panel air filter, Remap, lighter flywheel

Stage 2 mods: Ported and polished head, Fast road cam, fuel injector & fuel pump upgrades,power clutch

Stage 3 mods: Engine balancing, adding or upgrading forced induction (turbo/supercharger), Internal engine upgrades (pistons/head/valves), competition cam, sports gearbox.

Fast road cams offer one of the biggest performance gains as far as a bolt on part goes. Don't forget to uprate the fuelling when you are increasing the power - it makes the car more thirsty.

You will need to ensure that the engine is not starved of fuel so will need to uprate the fuelling to match your state of tune.

Uprated injectors will enable you to supply sufficient fuel to the engine. When increasing your fuelling you will also need to get a bigger fuel pump to supply it.

Intake and Exhaust Tuning on the 911.

The next area for modification is the intake and exhaust. Induction kits will only help to add performance if the cars air intake is restricted!

For most 911 engines TorqueCars would suggest you just go with a washable panel air filter. On heavily tuned engines and turbo vehicles an induction kit will help release the power providing you address the problem of needing cold air.

Sports exhausts will certainly help air flow through the engine but avoid an exhaust that is too wide or you may end up will reduce the flow rate. Stick to 2 to 2.5 inches for best results.

Head work including a head port and polished and 3 or 5 angle valve job will really help to release the potential of the engine. When you heavily modify your 911 you will reach a point that the standard clutch starts to slip so get an uprated clutch. The best mods that we recommend for your 911 are a remap especially on a turbo, a fast road camshaft and sports exhaust, with a good air intake.

Remaps offer large power gains on all turbo charged cars. 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. Adding forced induction will see large power gains but this is usually too expensive to be cost effective. Superchargers are usually easier to add than turbos. With a turbo the power curve is related exponentially to the engine speed making it harder to map.

It is easier to map a supercharger because the boost is directly proportional to engine speed on a linear curve. Alternatively you could add water injection to control knock.

Porsche 911 Wheel modifications.

The benefits of alloy wheels include a lower unsprung weight and more efficient brake cooling. The downside to large alloy wheels on your 911 is that you alter your effective final drive ratio and this will have a detrimental effect on 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.

Please join us in our forum to discuss the 911 options in more detail with our 911 owners. It would also be worth reading our 911 tuning articles to get a full grasp of the pros and cons of each type of modification.

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Top 10 performance modsCleaning alloy wheelsGuide to induction kitsRemapping guide

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