GEOO, depends on the engine, typically 11.5-12:1 under WOT. It's obvsiouly different at all loads, typically 13.5 range at idle and low loads, 13:1 during cruising no boost and tapers to 11.5-12:1 by the top. We use a true wide range sensor called a HEGO sensor, 6 wire, not the standard 5. This reads far more accuratly than the 5 wire and 4 wire that almost everybody uses.

Thanks,
Dustin

Dustin,on the subject of just clearing things up,HEGO is just a generic acronym for Heated Exhaust Gas Oxygen sensor.What you are using is actually a WAF or Wide range Air Fuel ratio sensor.
You are however very correct in that it is a far more accurate design of exhaust gas monitoring device :)

Thanks, Dustin..

F1campion, was it cylinder number 6? If it was, I know some tricks.
Also, TRUCKIN, the procedure for checking the timing on EFI engines is not done at RPM, but about 1200rpm with the computer in "service" mode to 8.25*. The timing at high rpm could be 40*+ advanced and you would not know wilthout a scan tool. This can give really poor performance.

Jeg's shows the MSD rev limiters at $94 apiece. I'll take $135 for both of them. I think I got 5200 rpm chips for them but cant exactly remember (might be 5400). As I said, new in box, but they are somewhere in my storage trailer - that'll be fun...