2014 gl550 cold start turbo spool
My 2014 bmw 328i with a catless downpipe has a open wastegate during cold start and gives no turbo noise




But, seriously, even if the wastegate is open, the turbo still spins. In fact, it spins the entire time it is running. If you want more turbo noise, get rid of any mufflers or resonators from the catalytic converters back. Sounds amazing. If you want less, get rid of the car and buy another Bimmer.
My 2014 bmw 328i with a catless downpipe has a open wastegate during cold start and gives no turbo noise
It goes away pretty soon doesn't it?
Johan






