Leon Cupra flutter on full boost

[garetha1980]

small problem that's been on and off for a couple of weeks, when on full boost in 2nd or 3rd the boost seems to flutter sometimes its not full on turbo chatter that's different it sounds like theres a small leak but as I said not all the time, could this be my diverter valve leaking? car has Revo stage 1 and CAI so the sound is pretty clear

 

[richicupra]

The flutter is normal on mapped cars on full boost.
I thought it was most noticeable at full throttle in 3rd and 4th gear from around 3000 rpm+

 

[garetha1980]

ow really why is that? it seems to go better when it doesn't do it which is why I was wondering if its a leak from the diverter valve or somewhere else

 

[majesty78]

It's surge of compressor. Very unhealthy for the turbo.

 

[lsg60]

As said its normal. Feeding in the power instead of having a led foot should help

 

[richicupra]

...

 

[richicupra]

It's surge of compressor. Very unhealthy for the turbo.

This is compressor surge:
https://www.youtube.com/watch?v=nCj6Spwl1CU

On the 2L turbo petrol the fluttering is caused by the wastegate opening under high boost. Which is why it does it at lower rpms (max requested boost), and not at red line.

 

[lsg60]

Basically your turbo is going here have some booooooost and your engine is like Nah bro don't need that much so your dv opens getting rid of what's not needed. Don't worry about it