***Warning, potential noob comments below***
^^^This is what I'm thinking Beachbuggy. I don't want to run a MBC as it feels like a tool to solve the symptom rather than the problem. I'm ok with looking at options to improve the engines ability to injest air, but TBH I thought that if the car was mapped with the TIP on it then I would have sidestepped this issue. Could it be because the car was mapped with a potentially faulty N75? As mentioned its now on a new OEM N75 and a new 008P DV so I expect the hardware to be ok. The flutter is only slight but TBH I'm staying off WOT at the moment just in case.
if slight, you are probably ok..
things which effect this is the total volume and flow efficiency of the "whole setup" and by that I mean inlet to exhaust.
buffer a larger "volume" which needs to be filled (compressed) by the likes of wellys supersize pipes and toyo core, suppressed the onset of surge.. pushing its severity and rpm start point upward.. as an example.
yep, mbc as suggested is crude bolt on band aid.. and suggested as I dont expect you to have mapping spotware or knowledge to deal with the ecu... and mbc is both cheap, and diy for fitment, hence suggesting it.
you could see about dropping % load scale a few % in unisettings to see if the clipped onset is enough, without sacrificing the rest of the >4krpm boost level..
log wise.. 003,115,118 are usefull as are 002,020,118 & 003,031,112 and several others.. Depends on what you are after doing with it and time/inclination you have I guess
what map is on there now? do you know? - EDIT: REVO I see.... what settings?
good luck