The picture shows the how you could recalibrate a stock P28 Civic EX computer with higher fuel pressure and bigger injectors to drive a turbo H22A Prelude. With a wide band lambda meter and Emulator it is possible to use RomEditor to Autotune the fuel tables. The fuel tables can be scaled with an injector multiplier (fuel trim) for different sized injectors, fuel pressures or even engine capacity changes. The red spot is the position in the table which is being accessed by the ECU. The car is run through the gears before the dyno run so that the engine is at the same temperature for each dyno run.
Here is a quicktime movie (550 kb) which shows ROM Editor during a dyno run. This is useful while tuning so that the position of the tables which is being used can be viewed in real-time. ROM Editor can datalog from the interface box. With the RaceLogic emulator changes can be made in real-time while the car is running on the dyno. ROM Editor will interface to two EPROM emulators, allowing the ECU to be updated very quickly. Tuning the ECUChanges made to the fuel & ignition tables, or other settings, can be saved to a file and written to an EPROM using an EPROM programmer. You can save a description, comments or tuning notes in the ROM file. This is useful for Asian ECUs, or for race cars with sensors missing. By disabling the VTEC spool the ECU can be configured to extend the fuel and ignition tables to 11,000 rpm for non-VTEC engines.The VTEC pressure input can be disabled for JDM Type R engines.VTEC can be disabled entirely for non-VTEC engines.VTEC switching has been changed to switch based on engine speed and engine load.This allows more precise control of fuel and ignition at high rpm. Extended RPM Tables (s200 only)įuel and ignition tables are tunable to 11,000 rpm on all supported OBDI ECUs. Air conditioning cutoff (s200 only)Shut the air conditioning compressor off automatically for increased performance when you need it. A very convenient feature which will save you lots of time.
Under Windows NT, 2000 and XP it is now possible to burn the Atmel 29C256 EEPROM from within ROM Editor. When creating new ROMs it is possible to adjust the part throttle portion of the fuel tables to suit larger injectors (the changes detailed on injector sizing have been incorporated). More custom tunes have been built into ROM Editor, saving you time when tuning a new vehicle. You need an EPROM programmer (like the Pocket Programmer) to burn EPROMs for the ECU.
ROM Editor is Windows based editing software for the s200 which allows you to change the ignition and fuel tables in the ECU, as well as several other important parameters.