Quote Originally Posted by jfpilla View Post
SSpdDmon,
I do respect your right to tune as you see fit, so I'm not trying to change your mind, just want to share my observations.
I don't see a voltage drop when I scan WOT into an IPW voltage table.
I like the extra resolution of tuning the MAF and I see other parameters logged showing closer trims. The MAF is really not hard to tune and you need to tune upper frequencies to get WOT PE to match actual. Timing tables are useless and need retuning anyway. A4's use B5919 not the MAF for calculations except for 98's and 99's? If you have an optimal timing table it's used. It seems more fueling dependent tables are affected by IFR changes. I don't find that setting the MAF requires any other changes.
It seems that same injectors in different cars use the same tables?
My engine is an LS7 with longtubes and cold air. It's otherwise stock. The IFR is stock LS7. Seems the right thing to do. The stock MAF table does not work.
Joe
I agree - there's some good resolution to fine tuning the MAF to dial in fuel trims. What I'm trying to avoid is massive changes. I think if you're changing it more than 5% or so, something doesn't seem right. I'm merely suggesting you get the IFR dialed in so, for the most part, commanded=actual. Then, any fine tuning you need to do afterwards shouldn't require anything major.

Oh well...I'll keep experimenting. It's fun...