cm570 turbo overspeed fault

[Rawze]

(10-24-2024 )pazz Wrote:  79254150
Last count boost was about 38psi
Engine was a rebuilt spare from a major company here, fitted by Cummins for the previous owner. Had 0 ks when I got it 3 years ago. Not sure on programming. I'm not well schooled on that side of things so tend to not stick my nose in it, but with some instruction I can check it.
No other garbage parts. Turbo is from Cummins. All other parts I've got genuine with the old combo being the only exception. I agree on parts comment. Funds were tight, works been pretty slow here last 18 months.
Matt

38-psi boost is borderline too high for that model engine. Its no wonder your getting occasional turbo over-spooling problems. The waste-gate should be set at 35-36 psi max at 600HP on a CM570.

Also,... if the turbo is OEM, remove the intake boot for the turbo and ook at the cold side impeller. - Does it have a 12-point nut on it, or a 6-point nut?. This will help determine if it is the right turbo for the engine tier. Post a pic of it if not sure.