14BFF

greetings,

can anyone share the injector dead time for 12613412 delphi injectors
they will be used on 6.2 L92 controlled with Megasquirt 2 PCM

thanks

ProServ

Is this what you are looking for?

Minimum Injector Pulse Width (Milliseconds)
RPM Value
0 0.250000
512 0.250000
1024 0.250000
1536 0.250000
2048 0.250000
2560 0.250000
3072 0.250000
3584 0.250000
4096 0.250000
4608 0.250000
5120 0.250000
5632 0.250000
6144 0.250000
6656 0.250000
7168 0.250000
7680 0.250000
8192 0.250000

Small Pulse Adjust (Milliseconds)
mS Value
0.000 0.000000
0.125 0.226563
0.250 0.148438
0.375 0.093750
0.500 0.054688
0.625 0.039063
0.750 0.031250
0.875 0.015625
1.000 -0.039063
1.125 -0.078125
1.250 -0.078125
1.375 -0.078125
1.500 -0.078125
1.625 -0.062500
1.750 -0.007813
1.875 -0.007813
2.000 -0.007813
2.125 -0.007813
2.250 -0.007813
2.375 -0.007813
2.500 -0.007813
2.625 -0.007813
2.750 0.000000
2.875 0.000000
3.000 0.000000
3.125 0.000000
3.250 0.000000
3.375 0.000000
3.500 0.000000
3.625 0.000000
3.750 0.000000
3.875 0.000000
4.000 0.000000

aaronc7

Unless things have changed drastically over the last few years, it's pretty simplified in MS2. You define the deadtime at 13.2V and you can also enter a ms/V 'slope' for the deadtime correction, that's it.

I don't have the data, but you probably need the voltage vs mani vacuum injector correction table data, then from that you can figure out some reasonable values to put into the software. MS2 doesn't have a small pulsewidth adjust/non linear region table for injectors....again, unless something has changed recently.

If you know a GM vehicle that comes with those injectors, let us know the year/make/model and can probably pull up a stock tune.

ProServ

Those injectors are used on many of the 2010 and newer GM trucks, especially flex fuel applications. The data I provided was from a 2013 2500 6.0L Suburban.

I assumed the OP had the main flow data since he asked for just the dead time.

Just in case, here is the main injector flow vs delta pressure data:

DeltaP Flow
kPa grams/sec
128 3.639892
148 3.853027
168 4.065918
188 4.278808
208 4.491943
228 4.704834
248 4.917968
268 5.130859
288 5.343994
308 5.556884
328 5.751220
348 5.917480
368 6.083495
388 6.249755
408 6.410644
428 6.563964
448 6.717040
468 6.870361
488 7.017577
508 7.155517
528 7.293456
548 7.431396
568 7.569335
588 7.707275
608 7.845458
628 7.983398
648 8.121337
668 8.259276
688 8.397216
708 8.535400
728 8.673339
748 8.811278
768 8.949218

ProServ

I tried to paste the voltage compensation table - but it is too big (33x17) and I am not sure how to paste a table and keep it in table format.

aaronc7

I would just paste to excel and upload. Looks like xls is only supported, so save the file in compatibility mode/97-03 format.

aaronc7

Also, this might help. MS2 does not model deadtime/voltage offset as a completely linear function. I made an excel sheet back in the day that lets you play around with the 2 input fields in MS2 and figure out what best represents actual behavior.

Input actual deadtime values into the green cells (feel free to create more rows for better resolution). Yellow cells are the two MS2 values that you have to play with in the software.

ProServ

Thanks. I was hoping a way existed to make the table viewable inside the forum message.

Here is the file as an Excel document.

Injector flow voltage compensation table:

inj_voltage.xls