I THINK IT IS OVERBOOSTING AS THE ENGINE HAS JUST BEEN CHANGED AND STAGE 3 TURBO FITTED WITH STAGE 2 PLUS BOX, BUT IT AINT BEEN SET UP YET!!!!!
i KNOW WHAT YOU ARE ALL THINKING BUT THE CAR HAS WARMED UP ONLY AND THEN DONE 1 MILE OF DRIVING JUST TO CHECK EVERYTHING IS SAFE. i ONLY PUT MY FOOT DOWN SLIGHTLY AND AT VERY HIGH REVS THERE WAS A LOUD WHISTLE (SCREAM) BUT THE CAR WAS PULLING FINE. i DONT THINK ITS ANYTHING THATS NOT MEANT TO BE THERE BUT CAN YOU TURBO BOYS PLEASE TELL ME WHAT SOUND YOU GET FROM YOUR TURBO SO I CAN NARROW DOWN MY POSSIBLE CAUSES. Also when i rev the car whilst the car is parked the sound is not there but when actually driving then it appears which makes me think its the sound of air through the turbo.