smoke out of exhaust

[white98gst]

the other day i was racing my friends GSR when i looked back there was a big cloud of smoke coming out of exhaust pipe on every shift. i couldnt really tell the color as my windows are darkly tinted, but my friend who was driving behind me said the smoke was dark grey almost black, it usualy only happens when im racinf like when i go up to 5000 rpms or so, im runing the stock exhaust with fully stock car exept for air filter. need oil chainge in about 500 miles.

 

[Lunch_Box]

Usually that means that you are running rich.

 

[iowaboostin]

I get greyish smoke out of my exhaust during each shift... I know I'm running rich, but it's most likely my turbo (T-25 is finally shot).

It can't hurt to check your headgasket (antifreeze in your oil.. there will be small bubbles on your oil dipstick), or even your valvestems at the worst case.

 

[kelvinb]

mine was smoking black, but it was because a spark plug was missing. i had major power loss, and i doubt thats your problem.