Steve40th

Without the catalytic converters on is it normal to see more black smoke when you intitially floor it? I noticed on the dyno and playing around with my little video camera that the car puts out some additional black smoke when you floor it or jab the throttle hard.
I do have low tension oil rings, and there is a little oil use and blue color in this video.
What do you think.
http://media.putfile.com/LT1-XE-2302...ng-and-revving

LT1Formula007

iTrader: (66)

I'd say as long as your not seeing it while regular driving your probably ok..... I cut the one off my 86 iroc with a built motor. Had full exhaust done w/o cat and it smoked a little more with the cat cut off. So I suppose it would be normal since you don't have the cat to catch all the exhaust and clear up the emissions. Hope I helped a little bit. Good luck

the_hunted

do you have headers and full exhaust? I ask casue you may need to tune it and trick the computer to think there are cats there.

Steve40th

pcnforless tuned it with the exhaust as it is. I had an O2 problem a while ago, maybe the data I sent was a little scewed as I went from unheated to heated O2's.

transam5.7lt1

iTrader: (18)

My trans am does the same thing, it does not have any cats on, it has an off road y-pipe, its does the same thing.