I try to tune my 2019 cadillac ATSL(e80a ecm),The desired boost can maintain at 250kpa when the manifold temp is under 55 ?C,I already disable the cot and turbo overtemp and set all boost limit to 250kpa.
So is the manifold temp cause my desired boost drop?How can I keep my Desired boost in higher manifold temp?Any help would be appreciated,Thanks
Your problem is maybe due to the high manifold temperature. 50 degrees is already very high.
Therefore, the ignition timing is pulled back and your vehicle can no longer provide the required boost pressure.