Does your turbo still spin after you shut down?

[Trapper77]

So, the other day I unbolted the exhaust from the cat to see what the sound was like. Drove it for about 15 miles and then when I got home I had the wife rev it for me while I stood outside (sound was pretty sweet by the way). After I had her shut it down I could hear the turbo spinning for about 10 seconds after the engine shut down. Is this normal?

On a positive note will soon be getting rid of the cat and muffler. Has there been any definitive on weather the MBRP cat delete will fit the stock exhaust? I have seen pictures of it done but was wondering for sure before I purchased.


Thanks


Trapper

 

[bushpilot]

the MBRP cat delete will bolt to the factory system w/out modification
(i have PERSONALLY done it).

and fwiw even w/ the FULL factory system you can hear the turbo spin
down (listen to it @ the exhaust tip)...

 

[powerboatr]

Short answer= yes
how long? depends on if you let it "idle "down for a few before killing the engine, or if you reved it up then killed it
is there oil pressure to the bronze bushing/bearing while its coasting =no, but there is residual oil film to protect it from reasonable coast down times.
i can hear mine for bout 3-6 secnds after shut down....

 

[ktpauley]

Ditto what powerboatr said. Turboback duals and no cat sounds when it spools down. Keith

 

[powerstrokeguy]

yeh it will spin after u shut it down, usualy 5-10-15 sec. its sounds great!

 

[Trapper77]

Thanks for the responses guys. I guess I am never usually outside my truck at the pipe on shutdown and with the stock system it really drowns out the sound. Thanks also for the info on the MBRP pipe.



Trapper

 

[DragonSlayer]

also, if you listen you can hear the sound of air moving through the cac system for a second or two after shut down.