Brown Smoke @ W.O.T. - is this normal?
when my car was stock with cats and stock intake it would even puff out a little if i were to downshift to 2nd at like 40 mph and hammer it. These cars run pretty rich on the factory tune above 4500 rpm im sure its the same way with ls1's. On the stock tune above 4500 my afr went from a nice 13.0 to about 11 or so close to redline


I'm not a mechanic so, that's why I come here… for the knowledge.
