All the information you need right here to start adjusting your subaru yourself with help form the subaru performance hand book, here is a quick comprehensive view of the Subaru and some tuning tips.
The Impreza has established itself as a fun performance car and is loved by tuners the world over. the accomplishment of the Impreza in Rally (winning the WRC 1995-1997, and drivers playoffs wins in 2001 and 2003) the car has sustained revision after revision creating the performance car we have today.
The distinctive boxer engine makes a lovely babel and provides a great base to . The WRX and STi engines are solid and reliable and can cope with a reasonable power hike. The engines come in 2.0 and (from 2001) 2.5 litre guise fitted with turbos and 200-350bhp depending on the level of trim. The engines do need to be and you must use the actual of oil otherwise they have a tendency to break under heavy abuse.
So onto the Impreza tuning tips:-
The early (1992) WRX came with a 2.0 and 1.8l H4 engine so with the latter it would be worth doing an engine swap with the larger and better base of the 2.0 H4 block. Capacity steadily elevated over the years and cars were almost always heavier as the years went on and fitted with uprated ventilated brake disks.
So what can be done to doctor up the engines on the Impreza? One of the best and easiest mods to do is a remap which can release an extra 30-70bhp. For bigger gains you need to uprate the other components of the engine such as by fitting a Big Turbo conversion kit or uprating the inadequately mounted intercooler for a front mounted part.
Some early models suffered from fuel starvation on long sweeping bends and this can be fixed by using a revised fuel pick up, for road use it rarely seemed to be a problem though (unless you like cornering at high speeds!)
If you are serious about subaru Impreza tuning then get a set of fast road cams, uprate the air intake and fit a stainless steel sports exhaust to maximise the flow through the engine. Internally the engine will benefit from port corresponding and a 3 or 5 angle valve job on the head. The sudden boost nature of big turbos can be tamed with an advanced boost controllers.
It makes sense to talk about brake upgrades after all these power mods, it is one thing making the car go faster but you really need to think about some serious stopping power with some decent anchors. Vented and grooved disks do a better job than solid disks. It also pays to get larger disks and 6 or 8 pot calipers which give a greater stopping power and better brake feel.
Further reading we recommend for subaru enthusiasts. We suggest that if you want more information on modifying your car yourself then I would recommed consulting the following sources. We have a comprehensive subaru tuning guide which is aslo very informative, user friendly with years of tuning and performance tips, this is a must have.
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So for all subaru enthusiast wanting learn more about subaru tuning and performance thensubaru impreza tuning is the place to visit
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