So I've been chasing problems for a while now, but this one has me at a dead end.
Either way, I've currently got my car running on wastegate pressure (vacuum line from turbo outlet to wastegate actuator, bottom pipe has been plugged up) so i'm running .5bar steady, but when it gets to around 4500-5000, the boost spikes suddenly to to 1 bar.
Currently running:
Stock turbo.
Stock wastegate actuator.
Stock Intercooler.
Stock Bov/recirc valve
Brand new 3" exhaust (but was doing the same thing on the original stock exhaust, just at .75bar instead of 1 bar, pretty much running on R&R)
All vacuum lines pre-throttle body and recirc/BOV have been replaced.
(essentially a stock car minus the exhaust)
I've checked for boost and exhaust leaks, which is another dead-end
Anyone have any ideas on what to try next?