Wrx Impreza
Wrx Impreza
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US $17.59
Subaru forester,sti,wrx,impreza tuning
Subaru forester,sti,wrx,impreza tuning
Improving engine power through mechanical upgrades such as free-flowing exhausts, intakes, turbochargers and intercoolers will boost the amount of airflow into the engine over stock. Any increase in airflow is immediately picked up by the air mass sensor. This causes the following things to occur:
Increased load forces the ECU to operate in areas of the fuel and ignition maps that it was not calibrated for, resulting in fuel mixtures that are too rich, eating up some of the power gains made by fitting the parts in the first place.Reductions in exhaust back pressure enables more ignition advance to be safely run in the mid range than the active ignition control system is programmed to allow, thus compromising peak potential power.Outside of the range of active timing control the ECU is effectively deaf and is programmed with a safe set of ignition timing values. These safe ignition values are for an unmodified engine.
At high RPM and loads ignition timing needs to be retarded, especially after 6,000 RPM, or the engine can start to detonate.Normally as engine load and RPM increases, both fuel and ignition mapping changes progressively in reaction to this. After modifications, very quickly the ECU can reach the end of its scaling so that in essence fuel and timing becomes fixed at the last set values.
This leads to driveability and reliability issues.The OE boost control is calibrated to suit a known set of exhaust and intake dynamics. More efficient parts can throw the boost control system to far out of sync for its closed loop boost control system to compensate for. Wild boost fluctuations, over boosting or even under boosting are all possible consequences.Products that modify the way in which the engine management system works, in order to address the above issues are broken up into four broad groupings.
They include re-flashing the OE ECU; fitting an interceptor type add-on controller; complete replacement ECU replacements; and finally plug-in chip upgrades. All of these upgrades have their place in the grand scheme of tuning things, each with their own pros and cons.
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If you want to get more out of your subaru check THIS out
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2002 Subaru Impreza WRX Black 1/24 Diecast Model Car by BBurago $14.49 Brand new 124 scalediecast model car of 2002 Subaru Impreza WRX Black die cast car model... |
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Tanabe Lowering Springs - GF210 [05-07 Impreza WRX / WRX STi] $266 "The GF210 coil spring is geared towards maximum performance, without compromising daily driveability. A subtle drop provides an aggressive stance, while the higher spring rates (+20% - 30% over stock) provide excellent handling and vehicle stability characteristics. These springs provide a very noticeable gain in performance when installed.;;;;The GF210 is well mated with a performance shock upgrade to extract the full potential of the coil spring, but will also work with factory equipment.;;;;Each coil spring application is tested for fitment and optimal weight distribution for sportier handling." |
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Agency Power Downpipes - Racing Downpipe [02-07 Impreza WRX/STI] $350 "Continually developing and enhancing the Subaru WRX and STI cars has been the goal of Agency Power. With a complete line up to make your Subaru the best in it competition, Agency Power has just released their all new Racing Downpipe. This downpipe fits all Subaru WRX or STI cars from 2002 to 2007. The downpipe is full stainless steel with a cast bell mouth upper section. The thich flanges ensure a tight and strong seal. The downpipe deletes both your catalytic converters and bolts to all factory style turbos. The downpipes precision welds and polished piping give the AP Racing Downpipe that cutting edge. Each downpipe includes a bung for an aftermarket air/fuel sensor as well as a bung for the factory O2 sensor.;;;;When adding an Agency Power Racing Downpipe to your Subaru WRX or STI, you will gain more horsepower and overall performance. The downpipe allows for better flow of the turbine and wastegate gasses. Unlike the factor downpipe that blocks the wastegate gasses from being released in an efficient manner, the AP downpipe has a large bell mouth which allows for both to flow smoothly out and down the pipe. The 3 inch diameter piping is the perfect size for the turbo cars from stock hp to 500 whp. The bellmouth will also allow for a little boost increase since there is less restriction. Mate this downpipe up with your aftermarket catback exhaust or one of our Agency Power catbacks for an amazing sound and almost 25 wheel horsepower gain." |