On my old setup i a had an internally gated GT3076 with antisurge compressor housing.

On my new setup i have an externally gated GT3071 without antisurge.

I have noticed a huge difference in the sound level of the 2 turbos. The old one with antisurge sounded very loud and had a nice raw turbo sound under boost and during spool-up.

My new one you almost cant hear... Is it because of the antisurge housing? Im talking about a huge difference in sound!

Have anyone else noticed this?