Originally Posted by
horsepowerguru427
If theyre working properly then there is no need to replace them. So, even with a wideband installed, STFT in OL DO NOT make fueling changes. You can monitor what the computer is seeing but it doesnt have the ability to make adjustments in the background like it can with LTFT in CL. DEFINITELY use the wideband once youre getting into WOT and/or PE though. Some people prefer to use CL and STFT+LTFT math to tune VE and MAF. I have had much better results using STFT in CL personally and ive tried all of it. I collect data in STFT and apply it until im getting <1% variation while driving.
I enabled STFT, disabled PE (mostly) just dont go past about 80% throttle or 6000rpm while collecting data. DFCO is also turned off and i changed the transients slightly for the cam overlap and larger injectors. go collect data using this tune (MAF only enabled) and apply changes by 1/2% as youve been doing. take a few logs and apply them back to back to keep ambient temp changes to a minimum. After doing the MAF then disable it and tune the VE. I like to start with the VE and move to MAF after but it doesnt really matter on your setup honestly. Let me know how it works out.