Got a chance to do a run today at 1335kg test weight (27deg C day). Redid a few setting (still no flat shifting) Start procedure was release clutch at 4500rpm *no slipping* bit of wheel spin and engine dropped down to 2800rpm.......... Managed
4.40 seconds for 0-100kmh time. (will post up a graph report when I can).
There is probably 1/2 a second in refining technique and also working out boost control, as it was quite low in 1st gear and mid way through 2nd gear (1st 6psi below 4k rpm & 2nd below 12.5psi under 6k rpm). Probably best to leave boost control at the 1.2kg setting and not using variable speed boost and let the traction control modulate the power rather than the boost controller as its much much faster and more precise.
I can run 40kg less weight too reduce fuel 20kg and 20kg of spare tire, jack tools etc... Maybe high 3 sec is possible on road tires