strange fluttering sound at high rpm for SC
 

Hey you guys a question for you as its got me a little worried.
-ive recently gone FI with a kraftwerks SC courtesy of the gentlemen at r/t tuning. I absolutely LOVE it and couldnt think of ever going back, in fact i wanted to get it custom tuned for 93 gas + a header if my bankroll allowed later on.

but the important matter at hand.....and the reason its got me a bit worried is that its only started happening since yesterday. when im driving a bit above the 4500-6000ish rpms, the engines starts to make this weird sound, like a tag fluttering in the window !

is this something to be worried about? i knew going FI had some..possible repercussions..but with the tune so weak i figure my car would have to last longer then just over a few hundreds of miles!
couple notes of my driving habits:
1) most of the driving was done on the highway between 2.7k-3.5k cruising.
2) the only times the car was really punished were for periods less then a minute. (redline from 1-3 and then stopped)
3) the hundreds of miles is closer to around 1200 miles.

is there something i can do to check for damage? should i be very concerned?? thanks in advance guys!

Not sure what you mean by tag fluttering. But Fluttering is caused by compressed air rushing back down to the blower when you let go of the gas pedal. Pretty much normal IMHO if it's not to much and only happens at the higher RPM's close to redline and letting go of the gas.

FYI: we don't have BOV we have a BPV

Can you record a video of the noise? If you can hear it windows up, then it should be crystal clear on a phone video.

Any other mods done to the car?

Sent from my SAMSUNG-SGH-I317 using Tapatalk

Are you partial throttle in those RPM ranges or full WOT?

If you're at a partial throttle value in an area of the band that is seeing boost, the BPV will open to release pressure and could sound as if it were 'fluttering.' If you're WOT, you should not hear any release until you've shifted and the BPV opens to relieve pressure during that suspension of load between shifts.