G series turbo whistle

[Gareth87]

Hey everyone

Just bolted on my new Garrett G30-770 ready for tune tomorrow and took it for a test drive.

Hoping it's normal, but it's waaay more whistly than my old GT3076.

Even coming off the clutch in 1st gear she starts whistling. I checked oil feed which was fine and its literally brand new so figured it's just got more induction noise than my old turbo.

Can anyone else confirm?

Thanks 

Edited July 3, 2022 by Gareth87
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[hypergear]

Might worth checkout shaft runout and balancing.

[Lithium]

Haven't tried a G30 yet but the G25 are super whistley, though one I played with turned out that the turbo speed sensor port wasn't sealed - bunged it off properly (make sure the plastic plug is tightly attached etc) and it generally behaved quite a bit better but did get a bit less whistly.  

I've wondered in the past when I see surprisingly laggy/low power results for G series if they also have a similar kind of leak 

[Gareth87]

Thanks for the reply. Good to know. I'll check the speed port as well just out of interest.