hey guys
the car is a r33 gtst
with a rb30/25 combo
engine was built buy hills motorsport
has
no vct solid cam
tomei pro cams 270duration 10.2 lift for inlet and exhaust
findaza adjustable cam gears
side entry plenum
mahl pistons
argo rods
acl race series bearings
n1 oil pump
standard harmonic balancer
rpm single plate ceramic clutch
3inch exhaust
tial wastgate
gt3540/ 82 r
power fc
740cc injectors
z32 airflow
eboost 2
car is getting tuned by 3 eleven motorsport tuner is shane brandon, currently worked for newcastle perfromance and unique auto sports
car will not make over 280kw no matter what boost pressure
1 problem,
thought to believe the car was polluting the charge? so after extensive hours and fiddling we put on adjustable camgears and found out that the timing was retarded.
fixed this issue dialed the cams in and still no significant power gains, then noticed problem 2
2.
boost pressure, turbo will create 20psi of boost but will not boost pressure. on the dyno graph. boost plot, the line drastically falls away at higher rpm, so we checked boost controller installation no problems
so then we disconected the conroller and ran it just with the wastgate, to find out it has a 7 psi spring,
so obivusly a stronger spring is needed?
problem number 3?
with the cams being 270 duration and 10.2 lift shouldnt it have a distintive idle? the car sounds like a boat, no crisp lumpy idle?
but on the short fall we cannot seem to get the figures you guys are creating.
an rb30/25 combo should be pushing around 320 350 kw at 25 psi?
any feed back would be great as my patience has worn particullary thin