Join Date: Feb 2000
Location: Detroit, Murder City
Yes, I'd like some more elaboration as well...
I've seen next to zero difference in measured A/F ratio before or after the turbo as long as the HEGO is up to temp and there are no leaks in the system. Mind you, I've tried on only a couple dozen turbo V8's with a meager ECM Lambda Pro setup, datalogging at better than 100Hz into the MD1750 under load.
We're not talking about driving around for three years with the wideband installed for daily driving. But even if we were, the stock HEGO's seem to live just fine and get accurate measurements both before and after the turbine.
Calibrated Success, Inc. EFI Training, Tuning, Consulting
Engine Management: Advanced Tuning