200 long studded block
low comp 7.5:1 accralite pistons
lightened and balanced crank and flywheel
steel conrods
high pressure oil pump
cooper ring head gasket
ported and polished head
double valve springs
bd14 exhaust cam
bd16 inlet cam
swedish inlet plenum
modified throttle body
1000cc injectors
level 8 ecu with pectal baby board
group a induction kit
vernier pulleys
t4 turbo-360 degree thrust bearing with cut back blades
38mm external wastegate with screamer pipe
rs500 intercooler
double capacity radiator
group a fuel pump
modified fuel lines

Could it be running lean when its chatting on boost? will a new filter fix it?