From what I remember, 6266 .84 divided rear with stock head forged bottom end, stock compression 26psi @ 135km/h (dunno what rpm)
T517z 10cm stock head and bottom end 23psi @ 150km/h (big HPI 3" dumps/ custom twin 3" to 3.5" front pipes/ custom 3.5" catback)
Both on caltex Eflex
Going back 25th of this month now with greddy camshafts and id2000's to see what happens, gonna work the cam gears for maximum response and midrange
Jez over laid his old setup with n1 turbos and his current 6262 and they both came on pretty much the same...could be posted in the 400kw thread
On the street my 6266 feels very nice, very happy with it