Disabling pilot injection with efi live

[Justinsixseven]

Just wondering how do I compensate for turning off the pilot injection? Do I compensate for it in duration? I have a 2012 6.7 cummins stock fuel system fully deleted.

 

[SmokeSmacked02]

When exactly are you disabling the pilot event? Over the whole table or after a certain rpm?

 

[Justinsixseven]

When exactly are you disabling the pilot event? Over the whole table or after a certain rpm?

I'd like to disable it over the whole table. Unless you suggest otherwise

 

[SmokeSmacked02]

I never turn off pilot until after 2,800-3,000 rpm if I turn it off at all, going to have a noticeably louder injection event for sure which I'm guessing that's what you are going for, but on a street truck I don't see the need to do so maybe some of the guys tuning pulling/drag trucks will chime in as to if and when they turn off the pilot event.

 

[Justinsixseven]

I never turn off pilot until after 2,800-3,000 rpm if I turn it off at all, going to have a noticeably louder injection event for sure which I'm guessing that's what you are going for, but on a street truck I don't see the need to do so maybe some of the guys tuning pulling/drag trucks will chime in as to if and when they turn off the pilot event.

Yes I do like the single event sound. Maybe just have it turned off until about 1100 rpm to have it on for high idle. But I also like the thought of less stress on the injectors. What kind of change in timing am I looking at? 8-12*?

 

[mikmaze]

what about gradually decreasing the time between pilot and main, that way you keep the fuel level up, and eventually end up with the single event you are after?

 

[2007 5.9]

Drop pilot/post and have main minimum around 6-8*

 

[Justinsixseven]

Drop pilot/post and have main minimum around 6-8*

What about the 0 and negative values? Still change those to a minimum of 6-8? Are the negative values after or before TDC?

 

[2007 5.9]

(-) are ATDC

 

[Justinsixseven]

(-) are ATDC

So do I get rid of the negative and 0 values and replace them with say 7?

 

[2007 5.9]

You can start there, you may find you'll need to adjust higher or lower depending on weather and ambient temps

 

[Justinsixseven]

You can start there, you may find you'll need to adjust higher or lower depending on weather and ambient temps

Thanks for the help!

 

[SmokeSmacked02]

I believe what Les is saying is use 6-8 as a minimum in the table to make up for not having the pilot being the pilot event helps the combustion of the main event so how I see it your throwing the fuel in just a little earlier so the fuel can have a more compete burn.

 

[Justinsixseven]

I believe what Les is saying is use 6-8 as a minimum in the table to make up for not having the pilot being the pilot event helps the combustion of the main event so how I see it your throwing the fuel in just a little earlier so the fuel can have a more compete burn.

Yes I knew I had to compensate for the loss of an event through added timing just didn't know how much. Thank you for your help as well