Last night i had a buddy in the truck with me so we took the truck out to the place where i alwas test out my new mods or race people. We had my hellion scan tool hooked and i put him on the bank 1 front 02 and bank 2 front 02 and timming we made two runs one on and one off the nitrous.
On the nitrous the 02's were .86
off the nitrous the 02's were .81
timming was 16 in 1st
14 in 2nd
12 in 3rd

no race fuel so i didnt try the high timming side. what do my 02 vlt's convert to in a/f.

 

I don't think it works like that.

the hegos aren't used during wot, so I'm not sure if the readings are even real, meaning, I don't know if the hego just kindof "hangs" at the last used reading, or if the hego continues to read accurately and the PCM just ignores it.

either way, .8v would be rich 0.0v is lean, 1.0v is rich.

but I still don't think this method using the stock sensors is accurate at all.

good luck though.

later,
chris

 

chris i think you are right because i just called my buddy and he said it didnt move the whole time. This means it probally hung on the last reading. guess its time for a wideband