This thread is actually a two parter. The first part is directly related and posted on the TBI fourm. ( https://www.thirdgen.org/forums/tbi/...-injector.html ) and concerns TBI injector size.

This is the second part an belongs over here.

Now with all of that out of the way, here's what I am thinking about doing. Because I think the current tune on my K5 is all messed up, I will be starting with a stock bin and working from there. I will be starting with a stock AKAJ bin. The first thing that I want to do is lean things out to compensate for those big Delphi injectors on the Holley.

My plan is to decrease the base pulse width ("bpw" in the 7747.ecu correct?) by the amount of the difference between the stock TBI injectors and the Delphi's on the Holley. Am I correct in thinking that this *should* get me very close to the factory AFRs?

Once that is done, I plan on taking a close look at the O/L AFR, then do some dataloging to see where the BLMs are in C/L. Is my thinking correct that I can bring the AFR where it should be by tweaking the VE tables?

After the fueling is done, I plan to start playing around with the spark table. so be prepaired for a bunch of questions about that.

As always, TIA!

 

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