Question on my latest log, Lean?

[joeym4130]

Hey guys
I know that a wideband is my next project since u can't tell mixture off a stock o2. But, everyone's consensus here seems to be .90-.93 on the o2 is good on a 1G. I did a 3rd gr pull last night: here is a sample
Timing O2V TPS


20° 0.86V 92.9%
17° 0.86V 100.0%
18° 0.86V 100.0%
18° 0.86V 100.0%
18° 0.86V 100.0%
19° 0.86V 100.0%
19° 0.86V 100.0%
19° 0.86V 100.0%
18° 0.84V 100.0%
18° 0.84V 100.0%


My o2v seems rather low does it not?? But I am getting good timing, and had one count of knock, thats it. It's a new o2 sensor, like 300m on it, so it should be good. Just wondering if I should worry... Thanks guys!!

On edit: just remembered.....I wasnt running the car long, but I am pretty sure it was at normal operating temps.... would the cold motor cause this? I think it might be the solution haha..silly me.

 

[xaosgst]

O2 ranges can be signifcant between cars so what "may" be the norm for others may not be even close for some

In general you want your timing to be a smooth curve upwards after its initial drop when you punch it with no flat lines or drops once you in it.

Since you didn't log RPM its hard to tell whats really going on. But at the end it looks like your a bit lean since your timing is going from 18 to 19 and back down to 18. Logging RPM's with your runs allow you to go back and adjust the fuel where you need it.

 

[FASTSPOOLINGST]

My O2 sensor voltage believe it or not is happy at .78-.80v I get 0 knock counts all the way through the rpm band. My O2 sensor is brand new also. Just goes to show you how all cars are different. Don't tune by O2v. Tune for 0 knock.

 

[joeym4130]

Yes I found out mine is happy at about .83, gotta get a wideband! I changed things around and now I got a smooth timing curve @ 19deg with no dropoff. Gotta learn to remember the stock o2 isnt a tuning tool Thanks guys!