I got my first day out in the car with the O2 sensor. This is what I found (67 degrees): N=1000rpms 13.4-13.6 15"hg (rich?) D=800rpms 13.6 11"hg (rich) light accel from stop = 13.8 (good?) light accel with pv open = mid 13's (good?) Cruise: 40mph= 2200rpms 15.8-16.0 (lean?) 45mph= 2400rpms 15.6 (lean?) 50mph= 2500rpms 15.4-15.6 (lean?) 55mph= 2700rpms 15.4-16.0 (lean?)
I did not test WOT. I was just out for a cruise for the first drive of the season. Are the 15.4-16.0 readings too lean?
Is the 2200-2700rpms on the main jet circuit or am I still on the transition circuit? I believe that 2200rpms and up are my jetting but I am not sure. I have read where 4 jets equal 1 full point on an O2 gauge. With my cruise reading high 15's, should I bump up my primary jets by 2 which might be equal to a half of a point on the O2 guage? This would put me in the low 15's if this works out right.
It was VERY windy (45mph + wind), but I did not notice any surging or pinging sounds.
Let me know what you think.
Thanks
1970 YO7 A66 [Canadian Export] F8 Challenger 340 (Currently in shop for stroker assy.)