Another turbo ?

[Bill Grubbs]

Originally Posted by Marc Kinton

Ok, we got the air/fuel ratio installed and I'm getting a reading of 11.2 or so on the O2. I'm assuming this means the car is too lean? I have heard we were looking for mid 12's on this reading. Two part question, am I correct that it is too lean and do I just adjust fuel pressure for this or fuel and timing? This is a 4 cylinder turbo ford combo stocker.

To rich... 11.2 parts of air to 1 part fuel. I have found 12.8 or so seems to make the best power (12.8 or 13.0 parts air to one part fuel). I hope this helps.

Oh, and to some extent it is better to be a little rich than lean...but you knew that.

Bill