Can anyone tell me the Seat Tension and Nose Tension of the Valve springs on the 4tech? (at least the Seat Tension).

I've just got some Ferrera Valves and the collet groves in the Ferrera valves are 20thou higher then the factory valve, so I have to set up the Seat Tension as its obviously going to be different to factory specs now. any help would be greatly appreciated.