[Sorrynotbryant]

Hey guys I’ve gotten mixed answers from some on this and wanted to bring it here to see what majority say based on their experiences. I couldn’t find any solid answers using the search feature but if I missed it please let me know.

I had a leaking hat and purchased a whole new pump with the ALM top hat and DW drop ins from someone else because it was used for little time before they upgraded to something bigger. Is a retune necessary with this new setup or will I be fine?
I’m running stock pump with a Devin Bruce auxiliary fuel pump, 1300 injectors, currently tuned making 617 pump and 677 e-60.

 

[Lt1z]

If fueling or airflow changes you should go over the tune

 

[adam112]

Bryant, you need to monitor things to know definitively.

With bigger pumps, when you hit high flow (boost) you may have more pressure than you used to across the injectors. That would likely throw your fueling off a bit.

Hopefully you have a wideband installed and you can monitor the results to determine if you need tune cleanup.

 

[db-guru]

If fueling or airflow changes you should go over the tune

I learned this when I first started modding my TBSS from my original tuner. Better safe than sorry.

 

[mememe123]

Hey guys I’ve gotten mixed answers from some on this and wanted to bring it here to see what majority say based on their experiences. I couldn’t find any solid answers using the search feature but if I missed it please let me know.

I had a leaking hat and purchased a whole new pump with the ALM top hat and DW drop ins from someone else because it was used for little time before they upgraded to something bigger. Is a retune necessary with this new setup or will I be fine?
I’m running stock pump with a Devin Bruce auxiliary fuel pump, 1300 injectors, currently tuned making 617 pump and 677 e-60.

Mine was like over 20% rich after DW pumps. If you look around, @random84 has a post on that, and I do as well in the tuning section.

 

[CarCrazyRDM]

After the addition of my ALM hat and AEM pumps mine needed some tweaking. At a minimum you need to do some data logging and make sure it's safe. Most likely if anything it'll be running rich and you'll be OK but it certainly won't be optimized until you have it retuned.

 

[Irishoverseas]

Data log at a minimum ……..


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