I shouldnt even have to re tune mine when I do a setup like this. Im already routing the blow by gases in this order, Im just not using the valve cover to catch the oil from the lower crank case.
When I did retune for this current setup I have I left the k value alone as with the o2 feedback switch turned off still equaled a stoich idle. All I did was adjust the fuel map slightly after a few pulls. My timing isnt optomised to its fullest currently anyways so it was fine to leave in my instance. Shortly after routing it this way I ended up doing a full retune because I was just setting it up for e-85 as I was getting rid of any open pcv for that setup.
I honestly think youll be the happiest with your fitting between the maf and turbo like you have it after a short retune.
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