After a very long period of sleepless nights we finally selected the coils.
They still have to suffer an endurance test but we finally decided not to go for COP’s for only one reason : reliability.
The space (diameter) is very restricted so it’s hard to find (small) fiitting coils
We studied the Denso’s from the Honda S2000 but they are too weak and because of the restricted space they soon start to warm up.
We decided to go for 4 Okada coils with integrated driver and the primary cables need to be as short as possible.