Category Archives: Uncategorized
2012 Legacy GT
While the Throttle by Wire system used in the newer Subaru WRX and STi is sometimes a bit odd, with a “lazy” curve that doesn’t open the throttle much when you press down on the gas pedal, the new Legacy … Continue reading
Improving The (2008+) Subaru WRX/STi Intake
The “velocity stack” that was used in the 02-07 WRX airbox mod can also be used in the 08+ WRX/STI. The test vehicle (09 STI) also had the AEM dryflow panel filter HP and TQ Boost and AFR
Automatic Transmissions and Dyno Charts
Chassis dynamometers (dynos) determines power at the rollers (or hub interface). As part of the calculation, it uses the speed of the rollers as an input. In the simplest output format, you can display power versus road speed. [2007 STi … Continue reading
Water Meth Injection and Turbo Boost Creep
Water meth injection can be used in turbo charged engines to cool down the air from the compressor before it enters the cylinders. The resulting air-fuel mixture is less likely to knock (abnormal combustion) and so the system can be … Continue reading
Per-gear boost compensations GR STI and GH WRX
Along the per-gear ignition compensation mentioned here, the boost control system on the new turbo’d Subarus can also be linked to the gear currently in use. The Throttle-by-Wire system converts the pedal position to a number called Requested Torque. This … Continue reading
Per-gear ignition compensations GR STI and GH WRX
One of the new “features” that was added to the newer turbo’d Subarus (STI, WRX, LGT, FXT) is that ignition advance at a particular RPM/airflow can be “offset” by some amount, based on the gear that is currently in use. … Continue reading
Now Tuning: Nissan R35 GTR!
Well, I am very excited to announce that Airboy Tuning is now officially a Cobb ProTuner for the Nissan R35 GTR (in addition to Subaru and Mitsubishi). To ensure that I get the most out of the Cobb software, I … Continue reading
Why You Need wideband AFR When Getting An Email Tune
Posted this a while back over at WSC. Figured I should give it a home here as well. Email tunes are sometimes necessary because there is no nearby shops that can provide the service. However, to maximize your chance of … Continue reading
What Not To Do When Tuning For Larger Injectors
When tuning for larger injectors, don’t go messing with the Mass Air Flow (MAF) table, or this could happen. Closed Loop Fueling First, some background information on how the Subaru ECU controls Air-to-Fuel Ratio at low load (idle, low throttle, … Continue reading
Dyno Dynamics Shootout Modes Compared
In a recent thread over at NASIOC I saw some inconsistencies in the data being presented. From what I can tell, there was/is some confusion or misunderstanding about what happens when “Shootout mode” is used. I decided to investigate this further. … Continue reading
