too rich or lean?

[awesomeame]

--2002 L36/m5.
--210/210 .507/.507 111ls 107ic
--LT1 24lb/hr injectors

here's a good log..scroll down a bit.

http://www3.sympatico.ca/2002camaro/docs/run2.csv

am i running too rich or too lean? i don't know how to really read the o2 mv values--any insight appreciated...also some o2 mv explaining would be awesome [img]smile.gif[/img]

--matt

[98Camaro3.8]

According to the manual, the typical values are from 100 (lean) to 900 (rich). Based on that, it looks like you're running rich. However, I don't know how that voltage corresponds to the actual A/F ratio.

[Clark Griswold]

You're right about on target, but 02s aren't very accurate. Dyno it.

If there were accurate .890 would be about 13/1 air/fuel.

You have to average out your O2s in WOT cells. That's how you get that O2 number.

Man you have enough missfires to share with everyone here.

[98Camaro3.8]

Originally posted by Clark:
Man you have enough missfires to share with everyone here.

Those misfires are all at idle, so it's possible it's just lope from the cam, which is what causes the P0300 code, right?

[Clark Griswold]

That code is for random multiple missfires so probably.

[awesomeame]

yeh, i get the P0300 code...i don't put too much trust into the misfire count honestly...seems atap is all over the board when it comes to that...like sometimes i'll get a 15000 or 800 etc etc misfires in one frame. ((shrugs)) also the atap a/f ratio always shows 14.7:1 no matter what so of course i don't trust that either.

ok i will have to hit up the dyno then.

for max power what should i be looking for for a/f ratio? is 13:1 good? thanks..

--matt

[Clark Griswold]

13/1 is what you'd want to shoot for.