I just did the 8 min test and I have a little lower value than that…
Besides I drop my chain in the last 20sec of the first interval and my awful pacing in the second one, i manage to have pretty similar power values in both
but my result FTP was 317 instead of 322 (358 *0.9)
I know I’m splitting hairs and I will leave my FTP set at 317, but I just was hoping to see a +320… 
Welcome to test variablity… from whatever you are using to measure power… not to mention yourself. It’s impractical to expect closer matches with all the variation that exists when trying to test and compare like this.
Close counts hear and it seems you got decent and comparable results (which is not true for everyone when comparing Ramp to other FTP tests). It’s a fine validation.
