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Title: 2.7T with gtx2867 gen II turbos, part throttle surge Post by: rnagy86 on March 21, 2021, 07:43:56 AM Hi
I've a car here with Garrett GTX2867 Gen II turbos, which works perfectly fine at wped_w > ~50-60% but everything less than that, will cause surge issues at the lower 2-3.5k rpm area. I've attached a log that captures only this problem and I think the problem might be is that for some reason wdkba starts to go down around 6-7% which might not be enough and the pressure builds up pre-throttle. At least that is my theory. I could not figure out the actual culprit yet, so I would like to ask the more knowledgeable to have a quick look and fix my stupidity please :) KFVPDKSD/E should be fine as I've accounted for the 0.9 bar wastegate springs and I've also made sure that msdk_w follows mshfm_w. Thank you. |