N54 low side preassure issue at high rpm

[whenlv]

Hi everyone

Recently bought an MHD, done some logging and noticed low fuel pressure issue. Under boost low pressure is going up and down too much. Might be someone had a similar issue?
or is it normal ?

I've changed fuel pressure regulator & filter in the left side of the tank, upgraded stock pump to Walbro 455. Always on full tank of fuel. Still experiencing the problem

My data zap 3rd gear pull on WOT: https://datazap.me/u/whenlv/3rd-gear-blow-log?log=0&data=3-4-11-20

Appreciate any feedback

 

[Slowagon54]

No, thats just perfect. Especially with a Walbro 455 you are going to see spikes which are normal. What tune is it? As if you ask me, your timing is quite low. You could try to add some timing as there are no timing corrections...