breaking up/ soft limiter

[boostinsidewayz]

I have a c5 corvette with a p59 ecu so I could run 3bar os with flex fuel

car idles and drives at cruise and partial throttle well. i started trying to work on wot tuning and it starts breaking up when it gets to wastegate pressure. if i can keep it 4-5 psi at part throttle it runs pretty well. i am new to tuning so i don't know if there is a table somewhere that i am missing. it doesn't feel like spark blowout or a misfire, its hard to explain.

the setup
6.0 gen3/4
twin 66/73
bosch 210s
twin 450 pumps
ngk bkr7 plugs gapped at .025
alcohol content around 79%

[jsf55]

Cant see any afr channels in your log ?

[boostinsidewayz]

im not sure why. it shows up on mine, i'm using the ac sensor. on mine i have it displaying afr on the gauges, and lambda in the charts. maybe its because my user math isn't on there?

[jsf55]

Can't work that out ! maybe someone else can sort it ?

[boostinsidewayz]

Alright, thanks for taking a look

[cobaltssoverbooster]

You would need to post any user math that you have created.
I just went through this with a 4 cylinder user. I made his logs work by creating new user maths parameters that matched his.