fg injector duty cycle

[will15]

Can you log injector duty cylce with the 3.0 scanner on a fg, can't seem to make it work. I am logging pulse width in channels and got the duty clycle in the charts and no deal.

[will15]

No one else has this problem?

[1duffman]

Yes you can. You need IPW of at least one bank I believe and RPM. Then put the IDC in the charts. At least thats the way I have understood it. And that how I have it, I have both banks IPW with IDC in the charts.

[will15]

Both banks?, how dose a straight 6 have 2 banks I am logging pw and rpm.

[Grant LS1]

I'm guessing duffman was talking about V8, I don't have access to a FG turbo but I believe it is possible just a matter of logging the correct parameters & do a math calc for the user defined pid?

[will15]

I tried doing a user defined but im to dumb to work out the equation quess i should of listen more in math class, i heard some where that the falcons will pulse the injector 2 times per 4 storke cycle not one like normal. Does anyone have the math equation worked out?.

[Grant LS1]

I'm 99% sure IH8TOADS mentioned it in 1 of his posts if you search his posts?

[will15]

yeah just tried a search couldn't find it.

[IH8TOADS]

I haven't logged with HPT 3.0. Mate said he had some problems logging IPW with an FG and 3.0 though. With other software I log RPM and IPW and then calculate IDC.

[will15]

Iv got rpm and injector pulse width they work fine but the predefined injector duty cycle does not.

[DarrylC]

Can't find my original post but:

IDC = IPW * RPM / 1.2

IDC is in %, IPW in Seconds

So if you had a ipw of 17ms at 6000 rpm your IDC = 17/1000 * 6000/ 1.2 = 85%. It would also mean your injector has 3ms of time available for dead time and closing time.

[IH8TOADS]

The deadtime is accounted for with the batt offset value at operating voltage. This is a fixed fuel pulsewidth adder, so if you want a more true IDC adder then add the batt offset value to your logged IPW and then run the IDC calc.