Blowing Smoke @ High Rpm

[Betz]

Heya,

My GTR tends to drop a pretty decent puff of smoke when up around the 6800/7200 RPM zone, the engine is a stocker with the usual mods (pipes & 3" exaust, pods and slightly bigger FMIC)

I have seen a few GTR's drop some smoke at high rpm but mine seems a bit excessive, its been dyno'd and is making 193kw at all 4 @ 6000rpm with .9bar

when held over 6000rpm it over boosts a bit and I dont usually hold it in gear too long, depending on the temperature it overboosts to between 1.2bar and 1.6bar

I know this is bad for my turbos (my tuner actually is not sure if they are stockers or not due to a late spoolup, he recons they could be some aftermarket ones)

I know skylines run a bit rich or am I kidding myself and its actually my turbos chewing themselfs up?

[emts]

what colour is the smoke?

[Betz]

what colour is the smoke?

black fine mist, but one night I did see in the RVM under street lights it looked a little blue

[GTRgeoff]

Overfuelling, but odd at high rpm.

until you do know what the turbo specs are then stay under 1bar. If a turbine lets go chances are you will have it come back into the 3 cylinders it feeds off and stuff the bores, or worse.

[Betz]

my tuner said its running rich and my car has a constant film of black soot on the back of it so I'm guessing if it is over feuling its just more noticable at high RPM gearchanges?

that sound plausable?

and yeah I try to keep her under 1bar, but it tends to overboost if its cold outside and especially if my oil is hot

[Interloper]

if its black smoke then its ok. Don't worry about it, but start looking to get a powerFC or remap your stock ecu (ie DrDrift)....will decrease smoke & increase power

[Betz]

already on its way Interloper,

maybe sooner than later

was hoping to leave the donk till last