The wbo2 info came from TGO. Been on those forums for years. Blm 128=stoich on GM pcms. But it's also an average. So you pipe the wbo2 into the pcm and log it time stamped with map, MAF, and the other values.
May not always want STOICH, like for highway cruising it may be more beneficial at low MAP values to advance timing and run a bit lean.
Bigger cams want more advance at low MAP values. I'm only running 10.7:1, so my car should be plenty happy running 93 Octane.
Well actually, not really. It's a misconception to think that 128 is = stoich.
For starters, stoich here is more like 14.2:1 w the 10%. The cal probably needs that modified from 14.7. I am more familiar w Speed Density than MAF but really they are two different ways of calcing air flow. One direct, one derived.
So you could start off keeping the cal in Open Loop and use the WB to rough in the tables, but then enabling Closed Loop and using the BLMs to get part throttle and idle on the spot.
Also, what overlap does the cam have? You very likely will need to address idle since most times the ECM is misinterpreting the fresh air drawn into the chamber and out the exhaust as a lean condition . Again, this is in Closed Loop.
Also need to disable functions like DFCO, EGR, Canister to tune properly. Min Air adjustment is also VERY important for proper IAC operation.
Just another note for now, and that deals w the correct Injector Offset v Volts.
Are these the stock injectors or aftermarket?
Some thought starters.