ignition timing not increasing - 3L Whipple on a Gen4 GT

[gapsauce]

Had this GT Mustang on the dyno today. It made ok power but had issues increasing the timing. I tried the all the mapped borderline tables (14-26 are used + Op Power), Cylinder Pressure Limit table, Knock Max Advance/Retard tables. I could not get the timing to increase more than a degree using a combination of those tables or individually. Is this much different than Gen3? I am not sure what I am missing. I have attached tune and log.

[JLawson240]

You're seeing 4 degrees of knock retard above 6600 rpm. Seems like you're gonna be capped at about 16-17 degrees. What fuel is the car on??

[Pistol_91]

Curious how much did it make

[gapsauce]

You're seeing 4 degrees of knock retard above 6600 rpm. Seems like you're gonna be capped at about 16-17 degrees. What fuel is the car on??

My bad, I just uploaded the correct log (named 670hpxxxx). I see this yes but If you look at the Knock Correction (+/-) channel, you see that its adding 4 back in at the same time. Car is on 94 Octane (Canadian fuel which is close to ACN91).

[gapsauce]

Curious how much did it make

It made 671hp 504 lb-ft on a Mustang dyno. 711/545 with correction factor.

[Pistol_91]

There's no reason to log knock retard AND knock correction. They're both doing the exact same thing, just opposite of one another. Also, no reason to log MPs 0-11 MP13 and MP OP since it looks like they're never used. Looks like the PCM is adding max 5 degrees at 7400. The way your tune is set up, it blends quite a bit on the upper RPM range. Going to be tough to narrow down and add what you want easily. You could go through all the ones you see being used at that particular rpm and load range and add 1 degree or a percentage but that seems like a pain. Here in the picture below is where MP21 is used the most in the RPM range. You could add there.
Screenshot 2024-02-15 104803.png

[Justinjor]

Gen 4 GT? Not sure I follow. Gen 3 is 2018-2023. Gen 4 is 2024+ and is not currently tunable.

[Justinjor]

Looks like your low side fuel pressure is tanking at the end of the pull. I'd make sure you have enough lift pump to support your power goals.

There's no HPFP DC, HPFP Pressure, or DIPI Blend on the log to see what the high pressure side is doing either.