You can use the Torque Performance guy for $150US. Very highly regarded on NASOIC. My Bro in-law has use him to tune his STi. He does tunes if you dont have a wide band.
Remote mapping without a wideband in my view is akin to playing russian roulette with your engine. I have mapped identical cars on paper with the same mods using my own base map as a starting point which I know to work well for that spec of car and the AFRs outcomes have been very different. In some cases up to 1 AFR point leaner which is enough to kill an engine if left uncorrected. There are multiple factors which can affect this. Without a wideband reading you have no way of knowing this. I\'m not trying to be a kill joy but keen we are all aware of the risks.
this is completely true. we never ever tune without a wideband. its best practice to be prepared and go balls deep than do a half baked plan
I do agree that wide band is best, but if you are experinced, you still can do a conservative tune without wideband.
Our case, we only had one tapping point for 02 sensor, The Nvidia Downpipe has a casted S/S flange which isnt really easily welded. On talking to the guy at Torque, he can do tuning without wideband, just its a conervative tune and takes a few more datalogs than normal. (every log there wasnt one knock correction logged)
When the Bro-in-law switches to E85, then wideband will be used.