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Wrx Wrx Sti
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 06-07 Subaru Impreza WRX/WRX STI CS Style Poly Urethane Front Bumper Lip Spoiler  US $33.50
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 DUAL CORE 2-ROW BOLT-ON HIGH CAPACITY ALUMINUM RADIATOR 02-07 IMPREZA WRX STi MT US $145.98
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If you're into fast cars and racing, you'll know that there are a lot of things you can tweak on your car to make it perform better; engine, suspension, wheel and tire modifications can all make a big difference, but one key thing that many people overlook is the brakes. I started autocrossing two years ago in my Subaru WRX. It's a great car to learn on; the turbocharged 4-cylinder boxer engine packs enough punch to accelerate quickly and the AWD not only helps you get the car up to speed quickly, but it helps you carry the speed through the corners too. But the biggest drawback to a WRX is its brakes. It doesn't have the same 4-piston Brembo brakes that it's bigger brother, the STi, has. So after my first few autocrosses on my stock brakes, I realized they needed some love if they were going to stand up to the abuse I was giving them.
Since I was only racing every other weekend, I didn't want to get anything too extreme; I needed a brake setup that was tough enough to not develop brake fade after a few hot laps, but easy enough to live with in my daily commute. So after doing some research on the internet, I found that my stock brake lines at the caliper were actually made of rubber! Rubber brake lines flex, which can add a squishy feeling to the brake pedal. So I decided to add a set of stainless steel brake lines and upgrade my brake fluid to a DOT5 racing fluid while I was at it. I also wanted the brake pads to have more initial bite after I hit the pedal, so I upgraded to a set of Hawk HP brake pads. They seemed like a good compromise to me as they are marketed as a performance street pad and I had read a lot of good reviews on them.
After getting these parts installed, I went for a quick drive and I could immediately tell the difference. The brake pedal was much firmer and the brakes were much more responsive to my pedal inputs. At my next autocross, the improvements in my lap times proved to me that improving your braking system really can make you faster! The better pedal feedback and higher friction pads allowed me to brake later, producing a higher average lap speed and slightly faster lap times. Plus I was able to do all three laps without experiencing any brake fade, which meant my brakes still performed well when my tires were hot and sticky. I certainly wasn't the fastest person out there, but I could tell that upgrading the brakes had made a big improvement to the way it performed on the track.
In case you have questions or need even more specific information, here are a few additional resources about brakes and auto parts like brake rotors.
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
what year of subaru wrx sti would you buy and why?
what year of subaru wrx sti would you buy and it what color?
i like the 2005 and black with glod rims and you?
i love the new one 2008 black and my customized blue rims!!
SCC: VIR: Subaru Road Racing Team race report
Hopes of a strong race result at VIRginia International Raceway were dashed today when the race for the Subaru Road Racing Team (SRRT) ended early following contact from another car.
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