Q. What size are the stock fuel injectors?
A. 560 cc
Q. How big is the stock fuel pump?
A. Same size as a Walbro GSS342, and flows 190lph
Q. What will void my warranty?
A. Just about anything you do to the car that is not stock. Some people have reported that Mitsu voided their warranty when they changed to aftermarket rims (Mitsu claims that the aftermarket rims affect the drivetrain and hence the engine since the drivetrain is connected to the engine). Even something as simple as a grounding kit, aftermarket brake pads, or a catback exhaust may see your warranty voided. The sensitivity apparently varies from dealer to dealer, but generally speaking, there is a reaso why so many are referred to as 'stealerships' who are ill-informed / ignorant of Evo mechanicals and use any reason to void your warranty
Q. How much boost can my stock blow off valve hold? When do I need to upgrade?
A. No one knows exactly for sure, but the numbers vary between 23 psi to 26 psi for the JDM MR BOV/DV. I am running a map that allows me to boost to 23 psi, and when I switched back to the stock JDM MR DV, I hit some CELs that wouldn't go away until I switched back to my GReddy Type-RS BOV. I am still investigating the cause of this problem to see if it caused by the switch between the JDM MR DV and the GReddy unit. When running boost levels above 22 psi, it seems to be a good idea (IMHO) to invest in an aftermarket DV/BOV. On hindsight, I should have bought the Forge RS unit right off the bat and not the GReddy. With the GReddy (and probably any good DV/BOV), the turbo spooled more quickly, but I cannot explain why.
Q. What is an ecu flash? How do I get it?
A. In the old days where tuners did not have direct access to the factory ECU, the only ways to tune the ECU was by using a standalone ECU, a piggyback, or a series of devices that would fool the ECU by modifying variables such as AF, boost, etc. These days, with software such as ECUFlash (
www.openecu.org), tuners can directly access the factory ECU and make changes that influence the performance of the car. ECUTek is another example of an ECU Flash tool. Custom tuning can be done for optimal gains, and mail-in flashes are available where mods are fairly simple (intake, TBE, etc). Al from Dynoflash and Jestr (John) of Jestr Tuning (
www.jestrtuning.com) are tuners who are well known on various Evo boards who are familiar with ECU tuning. A Tactrix cable is required to connect software such as EvoScan (datalogger), ScanTech Generic OBD-II reader, and ECUFlash. It is basically a USB cable that connects to your car's OBD-II port.
