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The excellent driver control interface includes a three-spoke, leather-wrapped Momo steering wheel with a comfortably thick rim, a close-at-hand shift knob, and well-arranged metal and rubber pedals that facilitate easy heel-and-toe driving. The STi adds grippy Ecsaine fabric seat and door inserts, both in electric blue, to distinguish it from lesser Impreza models. As with other Imprezas, the STi's dash and center stack have been revised. With good interior space for its size, it seats four comfortably. At $33,020 base (including destination charge) or $33,938 as tested, it gives supercar performance and rally technology at a very good price.Ĭompared with dedicated rally cars, the STi offers relative luxury. The result is that Subaru's beast is better than ever, and its limits are even higher. There are significant upgrades to the steering, the suspension, and the Driver Controlled Center Differential (DCCD) all-wheel-drive system programming. The styling remains the same, with rally-car fender blisters and the huge rear wing, although there's a new underbody cover for improved airflow and high-speed stability. The 300-horsepower STi, introduced in 2003 as a 2004 model, has some significant tweaks for 2005. The Impreza-based WRX was a legend even before it became available in the United States, known mostly from magazine articles and video games. It's loud enough inside that, at speed, you won't hear the audio system all that well, but you'll be too busy driving to care. It has ferocious power, and its suspension is optimized for high-limit cornering-at the expense of ride comfort and normal levels of interior noise.
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This is not a car for the casual driver or the uncommitted nonenthusiast. With any WRX, particularly the STi, the entertainment is in the driving. Technology, in the context of the Subaru WRX STi, is less about entertainment than driver control, which is appropriate, given its status as Subaru's high-performance flagship. Wait for this number to come down before doing any performance pulls.The STi in the Impreza WRX STi's lengthy appellation stands for Subaru Technica International, Subaru's high-performance division. Also if your not running a heat shield or box this number may be very high in traffic or stopped. Avoid doing pulls if you see the intake temp above 100* If you are in traffic it's good practice to let the engine cool down before doing any pulls. This is the temperature of the air entering the engine. Intake Temp Manifold(FA20 2015+WRX) This is the temperature measured at the manifold after the inter-cooler. If you are running our tune and see this going over 95% please goto our page and get us logs over so we can correct the issue. When they go-to 100% They are now wide open and cause uneven fuel flow, loss of performance. Injector Duty Cycle ( STI running stock injectors) If you have a EJ25 On stock injectors Its important to monitor the injector duty cycle to ensure your not maxing the stock injectors out. If you have a 2015+ WRX use intake temp manifold. Over boosting can lead to engine damage, and under boosting could be signs of a boost leak which again can cause damage.įor the 6th gauge if you have a STI or WRX with a EJ25 Use injector duty cycle. Wait for this number to come down before doing any performance pulls.īoost You can log target boost on the tune a few times to see what your target is, you want to ensure the car is always hitting close to target. Intake Temp This is temp measure at the INTAKE pipe (MAF sensor) Avoid doing pulls if you see the intake temp above 110* If you are in traffic it's good practice to let the engine cool down before doing any pulls. If the ecu detects no more knock it will raise dam back to 1 when it no longer has the issue) Drive carefully for that tank and when the gas light comes on fill with fresh 93 from another station. Changing of this number could mean you have bad fuel, poor condition spark plugs,boost leak,vac leak, fuel issue. If the ecu detects no more knock it will add the timing back in)ĭAM You want this number to be at 1. Drive carefully for that tank and when the gas light comes on fill with fresh fuel from another station. AF Learning #1: You dont want this number out side of + or - 10% If it ever does you probably have a leak, Dirty maf, or need an adjustment if its not a NEW issue, If you seen a SUDDEN change in this parameter, please check MAF harness, MAF sensor and the filter, if all of those check out its time to do a boost leak/smoke test.įine Knock Learned If you see this number over -3 you probably have gotten bad fuel or have a boost leak (Don't reset ecu.