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I have no hard data to report, but I have to say, having driven it to work and back all week, mostly on wet roads (and therefore mostly not able to contemplate anything too outrageous anywhere)..... it is real good. I turned the boost controller on, with duty cycle set to 10% (which may not be enough to actually increase the boost), and the start boost set to 15 psi. That should keep the gate unpressurised until at least 15 psi. And rolling at 80 in 5th, which is 2050 rpm, going to WOT sees the MAP go +ve very quickly and it has >5 psi by the time it hits 90 km/h. That's still <2.5k rpm, so I think it's actually doing really well.

(I edited this from a previous version where I stated 80km/h was <2000, but that was a false memory. If I am rolling at ~1700 in 5th and floor it, it will start making boost before it goes over 2k - which is a separate "experiment" leading to the same conclusion. Which is that the boost threshold is actually quite low. It's not fast there, obviously, but it certainly makes progress towards going fast, which is not what it's been like for a long while!!)

Because of all the not-quite-ideal things that have been in place since the turbo first went on, it felt laggy. It's actually not. The response appears to be as good as you could hope for with a highflow.

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