Well aftter a long nigth last night trying to tune the datto we are still trying to find the problem
It runs fine new turbo making 8psi at only 3000rpm revs sweetly to 8000rpm BUT!!! as soon as load on the dyno it missfires at about 8psi all signals to computer are fine plugs and gaps are fine we changed a few. We tested the spark even with 30mm gap we had a bright white fat spark!!
WARNING never touch the positive of coil while car is running (very painfull shock)
so what I have to try and do now is source the problem I have 4 new bocshe coils that have run fine with 20psi. the MSD Dis 4 is reasonable new im going to try and borrow another and plug it in to see if that the problem if so Ill replace it for the R500 autronic model.
Does anybody have any other ideas as to what may be going on??
Cheers Andrew