running lean

[timopajala]

is it normal for lt1 that the spark plugs are really white? I have no color on them what so ever. Also my headers glow red for few minutes after start up, i have New Speedway 1965-1989 SBC Chevy Fullsize Car Long Tube Headers, Stainless Steel. i have 466-8 cam and custom tuning for it but i think its not tuned enough. also have cold air kit and power filter.

[popo8]

Do u have any pics?

Is the rest of ur build stock?

How was the tune done?

Any chance ur running an a/f guage or can data log to see what ur a/f is at?

[timopajala]

don´t have pics but i can take next time in there. Besides the cam and cai all else is stock. And forgot to mention no cats because this engine is in 1967 camaro. i don´t have data cable at this time but gonna order one to have a look inside the pcm etc

[popo8]

Ok... will wait for pics. Tell us about the tune. Who did it... how was it done... mail order... street driving... dyno?

Im not familiar with the cam so that advice will have to be from someone else.

[timopajala]

it was mail order from lt1 pcm tuning. We are gonna continue the tuning as soon as i have the data cable. I´m pretty sure its because of the cam and cold air system that its so lean. Plugs are almost as clear as i got them out of the box. i stopped the engine after i see the glowing on the headers. That could also be normal, i read somewhere that thin stainless headers can do that. And this question also came into my mind: does the 02 sensor work right away or do they take time to start operating properly? I have heated 02 because of the long tubes and that might also do something. Also gonna go to garage next weekend and make sure i have no exhaust leaks anywere.

[popo8]

O2s are always working... but the car/computer does not make adjustments based on their "findings" till it goes into closed loop.

What year is ur set up... i do a tuning computer/software loaner program... ull see it stickied in the tuning section.

[timopajala]

my setup is 1993 speed density. So it could be that the lean condition goes away when it gets to closed loop. I´ll have to get the cable to get logs on it to know better. I mailed the tuner the info and know waiting to get the cable and then send logs to the tuner. I think my own cable works, i just didn´t know how the program worked. Going on to the garage tomorrow for more testing.

[popo8]

keep us posted man.

Also would love to see more about this car/swap.

[timopajala]

i can take pictures tomorrow when i go to garage and snap few pictures for you I´m gonna paint the car next winter if i have enough money saved By then

[gmpowered]

It sounds like its running as it should. Its running slightly rich on startup. Then it leans out. Cars are supposed to run rich at startup that's why the headers glow. Then it leans out.

Solomon at lt1tuning is a good tuner. Stop guessing what's going on with the car and install a wideband.