Injector Dead Time

[Joesmallwood]

Finished a recent engine build and still sorting through the fun and excitement of tuning the ECU. I have looked high and low and read many things on Injector Dead Time and have found some more complex ways of establishing the dead time. I am curious if anyone else has experience with Accel 150630 30lb/hr injectors that could provide direction on injector dead time, the voltage correction curve, squirts per cycle, etc.

I am running MS3X, RHD ITBs, twin plug, COP (Toyota COPs), 3.55liter (from 3.0), 10.5 CR, and more.

Any help would be really appreciated.

[Marwil]

Try this data. If I am interpreting this correctly dead time at 13 volts is 0.823

[jpnovak]

Use Excel (or other program) to make a linear fit between 11V - 14V. This will give you Voltage offset. Use your linear line to predict dead time at 13.2V (usual reference dead time voltage). Adjust voltage point as necessary.

[Joesmallwood]

Thanks guys, this is perfect!

I came up with this. I will try this tonight and so how it responds.

[jpnovak]

I would only focus on the 11-14 range. If you go outside these bounds you have serious electrical issues. Dead battery or dead voltage regulator.

[Joesmallwood]

Originally Posted by jpnovak

I would only focus on the 11-14 range. If you go outside these bounds you have serious electrical issues. Dead battery or dead voltage regulator.

10-4. I was wondering the same thing when setting up the curve and setting up the MS3X correction table. I will go back and focus the correction curve between 11 to 14.

[Mr Beau]

Last car I tuned was somewhere between 10 and 11V with a reasonable battery, so below 11V isn't unfathomable.