ok cheers mate... its an a1 rallysport engine with group a head and bd14 inlet and bd10 exh 7.2 :1 comp.. they said the ecu is a group a spec i have read about your closed loop lambda conversions would the ecu be compatible for one of these.. its a L8 in a 2wd.. just realised how much more fuel its used on the greys from greens on my old engine.