Throttle closures and boost overshoot. Input needed.

Hey guys. Lately I have been having some issues with boost overshoots resulting in throttle closures. I don’t really feel this and it doesn’t seem to affect the power of the car. The car pulls strong and did 427/443 on a dynojet this weekend. I talked with Terry and he thought it was because my FF was higher than my PWM. Looking back at my old logs, this has always been the case and I really don’t see a difference between now and then.

I have used multiple variations of backend flashes with partial and full writes. I have thrown up a log done on the street and recent dyno. Since then I did 1-7 on the JB4 to reset adaptations. The idle and start was noticeably smoother. The logs still show some closure but I am assuming it may be adapting? Not sure. Just looking for some more input and open to suggestions.

Mods are JB4 G5 with custom E85 backend. BMS charge pipe and DCI. Stock FMIC and DPs. E60ish fuel with Walbro and HPFP is <1000 miles old. Walbro and new LPFP were put in about 4-5k miles ago.

The first photo is a log about a week or so ago. The 2nd picture is the dyno the past weekend. The next 6 photos are consecutive logs over about 1 hour after resetting adaptations tonight.


It doesn't look like you can upload the .csv files so I put there here in a dropbox folder
https://www.dropbox.com/sh/wm8jxl3nhiruyh9/fadtiqE5ru

Thanks!

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