Injector Pulsewidth Table

What if you injector Pulse width table only states 0mg to 80mg but in your Base Fueling tables you ask for more than 80mg fuel? would it help changing the table to the max amount of mg that you ask for? No changes to the injector timing, just changing the Desired Fuel Mass (mg), min to max desired fuel mass(mg) column..

I tried doing the calculations but in my base fueling tables I request more fuel than in my injector pulse width table.

Its the same issue with a lot of Torque tables, my vehicle makes a lot more torque than stated on the tables, and some tables also display different values of torque, some say 550Nm and some 1000Nm. Just doesn't make sense to me, vehicle was tuned by a reputable tuner here in South-Africa.

3.2 Ford Ranger

Hope that makes sense.

Regards.

Norton,

Short answer- Yes.

Long answer: If you make those changes to the injector pulsewidth table the ECU will be better able to manage smoke and lambda limits. The absolutely critical thing to remember is that simply rescaling the tables to match your commands makes sense only if your log files are showing the ecu commanding those higher values. Basically, the lowest hanging fruit is to rescale the tables out as high as the data in the log files. If you're commanding 120mm3 and the ecu is delivering 96mm3, then it doesn't make much sense to scale the table out past 100mm3. Same goes for torque. You may be scaled to 550Nm in the tune, making 800Nm on the dyno, but only showing 675Nm as your highest 'actual' in the data log. In this case it makes no sense to scale things out much further than 700Nm.

Hope this helps,

Nick

How is this done? Do you need the User Defined Parameters License (HP Tuners)?

In HPT you can double click on the axis you want to adjust. Or right click on the table and select edit axis. It's not available on every platform (LB7/LLY/LBZ isn't great for instance). I'm not sure if a special license is required.

Nick