smoking.... turbo?

[myees13]

Redtop, 3inch turbo back, FMIC, 10psi

previously this turbo was daily driven 20psi+ (spiking)^I know- it wasnt me^

Anyways, it will smoke dark grey/black out of exhaust (muffler) only after a really hard run (autox track this weekend). After it times down, and shuts off for a few minutes, it is fine- no smoke- nothing unusual.

Same thing happens around town, I daily drive normally an no smoke. Sometimes when I get on it hard it will smoke afterwards a little.

Is this the turbo slowly going?

I checked shaft play on compressor side and it is more than I would like, but nothing extreme. I think this sounds right on, since it doesnt smoke all the time, I wouldnt expect there to be a ton of shaft play.

I assume it isnt the engine burning oil, since it doesnt smoke when driven normally.

[karmakaze]

what turbo is it?

[myees13]

oh yea sorrystock t25

[Nicksemianiw]

20+ PSI on the stock T25................ I would say it's starting to go or is already dead.

[myees13]

yeah but does the desription of smoking match a turbo that is on its way out?

[Nicksemianiw]

Somthing sounds off, your turbo is like you said probly going slowly. So if I were you i would buy a rebuild kit and go at it.

[Blown240sx]

dark grey/black = fuel

light grey/white would be oilsweet smell white smoke is coolant

your turbo sounds fine if its dark smoke, thats a sign of of running rich.

[myees13]

hmmm, I dont understand what would make it run rich.

Stock fuel system + Walbro pumpNo tune Stock ECU

Am I missing something?I might go to dyno for $60 they'll run A/F along with dyno runs.

[Blown240sx]

give you an idea of why it does it.

Stock SR fuel system uses a stock FPR. When you put a Walbro pump in it bumps the pressure from 20 something PSI at idle to 40 something. It pushes more fuel than a stock SR pump would, now if you go to a after market FPR you can stop that.

[Pepperoni]

^^ True. stock is 43.5psi with vacuum line disconnected. ~35psi with it connected.

I never tested mine with the stock pump, but i have a walbro 255 high pressure unit and i just tested the fuel pressure and it is exactly at 42psi with the vacuum line connected. So it is raised about 7psi higher than it should be with the walbro.

[myees13]

aftermarket FPR is next then, thanks for all input

Any FPR reccomendaations?

Megan Racing is around $100, the Nismo one doesnt have a gauge though...

[Nicksemianiw]

I can get a Megan Racing FPR kit for 90$ canadian so like 65 american.

[Blown240sx]

Go to Ebay buy a Nismo FPR for like 110 shipped and buy a Oil Filled FPG for like 30 bucks and your set for life