CM870 power issues

[kamiar]

(12-07-2022 )Rawze Wrote:  

(12-06-2022 )kamiar Wrote:  Hello all, We have a CM870, 565HP, all stock, on an engine dyno that is been calibrated recently, it makes close to 700HP and Pyro jumps to 1060F under full load, all sensors reading seems in range, new injectors, turbo, egr valve, etc, tried older calibration as well as latest, AB10352.23, when i am think about it, i had at least one more stock CM870 and that was also making around 680-700HP on the dyno, we have a straight pipe exhaust system on the dyno, any ideas?

sounds to me like the dyno is not showing you the correct numbers.

What is the fuel flow and boost pressures/.. mg.stroke during testing?. Without a lot more fuel, it will not do those numbers. Gureatee you that if the fuel flow is what it should be for 565hp, then the dyno is lying to you. That or you need to call every scientist on the planet and tell them that your engine breaks the laws of thermodynamic and you now have proof that aliens exist!.

I hear you, we run a lot of engines on this dyno and they all make the exact hp that they are supposed to, only these CM870 CPL 8018, boost is 32PSI full load, fuel flow i am not sure but i will look again and report here, btw the timing and metering actuators are replaced as well...