These direct replacement high-low 750cc Motorsport Injectors are suitable for replacing the standard port injectors for power outputs over 300bhp. Included in the package are…
Once you have installed the high-flow injectors it will be necessary to calibrate the ECU with the correct settings ofInjector Flow Scaling, Injector Lag Time Offset and the cranking fuel tables in EcuTek ProECU software before you start the engine.
The job of installing the new injectors and recalibrating the system should take approximately one hour to complete.
These can be found at Maps by Function → Fuelling → Injector Scaling → Port Injector Scaling
Original value: 228
New value: 750
The new Injectors have a different lag time (response time), so you'll need to change the setting using the Injector Open Time Compensation Maps found at.
Maps by Function → Fuelling → Port Injector scaling → Injector Opening Time Compensation
Set this map with the values shown below.
The Cranking fuel maps will need reducing when larger injectors are fitted because the port injectors are used in the crank condition, and the EcuTek injectors have more than three times the flow of the original units.
When these injectors were fitted to our development vehicle we reduced the values by 75% in all of the cranking fuel maps shown in the screenshot below; you may have to reduce/increase these map values for your application or for running on ethanol fuels. Be sure to adjust all cranking maps by the same percentage.These maps are found i
Maps by Function → Fuelling → Cranking → Cranking Fueling #1 → #5b
Set these maps to 25% of their original value but selecting all of the values and pressing CTRL + P.
Cranking fuel is calculated by Manifold Absolute Pressure and if the MAP sensor has been changed you must ensure that the correct MAP sensor scaling has been entered. |
You can simply verify the MAP sensor scaling by turning on the ignition and checking atmospheric pressure, which should be 1.0 bar at sea level with the engine NOT running. MAP sensor accuracy is important for the cranking fuel volume to deliver an amount of fuel to the point that if a stock car has a 2.5 or 3.0 bar sensor fitted and the MAP sensor scaling is not recalibrated, the engine won't start
You can now program the ECU, start the engine and check the whole fuel injection system for fuel leaks.
Only the port injectors are fired during cranking; these operate at idle when the engine is cold. They work at lower RPM, but with the factory calibration they do not run through the mid-range on higher load (2400rpm-5200rpm) but come back in at high RPM.
The fine-tuning procedure should be followed; you'll find it in the PDF-format BRZ Tuning guide (at C:\EcuTek\ProECUHelp\BRZ-FT86). Following the MAF scaling section of the manual will enable you to fine-tune the injectors.You can find further advice on setting up the port and direct injection ee the ProECU BRZ Tuning guide for further advice on setting up the port and direct injection settings.
No other Warranties |
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To the maximum extent permitted by applicable law, in no event shall EcuTek be liable for any special, incidental, indirect, or consequential damages whatsoever (including, without limitation, damages for loss of business profits, business interruption, loss of business information, or any other pecuniary loss) arising out of the use of or inability to use the product or the failure to provide support services, even if EcuTek has been advised of the possibility of such damages.