[cjperformance]

My understanding of the continued/long-term use of the lambda feedback is that it's fine. What I recall from the video is that initially you may allow +/- 20% lambda correction. My interpretation is that it's used in this way initially as a safety factor for initial shakeout.

Then the idea is that you use the correction values to adjust the tune. The intent would not to be to continue allowing massive amounts of correction, but rather get the base tune closer. Once the base tune is not requiring a large amount of correction, then you would reduce the amount of allowed correction to whatever you are comfortable with like +/- 2%, 5%, etc...

You can run HPT scanner and reflex logging at the same time. That's what I've been doing. You'll have two connections to your laptop, one from the MPVI, and one from the reflex box. Then you just open HPT scanner and TunerPro at the same time and log individually. On my tuning laptop it seems to require quite a bit of drain on the battery when both are open, but the laptop I'm using is an older one.

My low side pressure is rock solid, but I'm not pushing it hard yet. I've only done a couple of sub 6k rpm runs on E50 with the 4.13 pulley, but it is stable so far.

I doubt you are at the limit of any low side pressure. I've got the crappy LT1 low side pump + DSX and things are fine so far, but we'll see after I pulley down and raise E content.

I would think there is some kind of fuel pressure compensation with the reflex???? but I don't know for sure, maybe a question for Mike? But if there isn't then I could see why low low-side pressure could cause a lean condition.... I just haven't experienced that since I've been super-conservative. Once I go full E85, pulley up, and raise shift points... then maybe I'll see something.

I'd wager your in-tank low-side pump is trailing off too much and sabotaging the DSX efforts.

In any case, I'd def enable the lambda compensation, no matter what method of tuning you are using.

I'll post a few things from HPT logs later. I don't have them on my current comp.