Cm870 low boost high egt

[Wesoja2]

I haven’t had a chance to set it up to monitor in CT but insite is showing turbo speed derate once turbo hits about 90k rpms

[Rawze]

(09-04-2026 )Wesoja2 Wrote:  I haven’t had a chance to set it up to monitor in CT but insite is showing turbo speed derate once turbo hits about 90k rpms

at 90k+ rpm, those older 500-series turbos should be making very high boost. If not then something is very wrong.

Usually a serious restriction in the intake or exhaust. If not then the turbo exhaust impellers could be damaged.