HI,

Do you have a std cam pulley, or adjustable type vernier,
and are you sure its a turbo head and cam on the engine
as the turbo used a 1.3 cam pulley to retard the valve timing,
the head rs is the same as xr3i,reworked.exhaust valves different.
Have you checked the ignition timing with a timing light you should
be able to set it spot, and if not check valve timing, when you check
the ignition timing with a light is it advacing as u rev engine with ecu
pipe connected
Dave