Fuel 9 is lean (performance 99 octane fuel). Fuel 1 is a richer AFR according to Revo's set up guide... Only way to check whats best is log the car for correction factor on all cyl and run some gears on the road testing settings. I was thinking of lowering fuel to 7 and log it at Timing 5 and if all is good put timing to 6 and check again.
See below:
"One feature of the select plus units is the ability to adjust the requested air fuel mixture the engine will burn. It does not control fuel injector on time but rather sets a target air fuel mixture for a richer or leaner burn. Position 0 on the SPS3 is always stock and position 9 will typically yield a .91 Lambda for normally aspirated cars. If you are not familiar with AFR (air fuel ratio) we recommend leaving this setting at 9. This adjustment is only a target and will not force the ECU to comply; if the setting is outside of the safety parameters the computer will compensate for the error allowing the safe operation of the vehicle"
Source:
https://products.revotechnik.com/products/pdf/SelectPlus_AdvancedUserGuide_V0707.pdf
My understanding is its better to run slightly richer AFR than leaner with my fuel set to 9 if i ended up stranded somewhere without 99 ron and had to put in 95 i'm sure i would get knock on the current fuel setting.
When you took it in to be mapped did you tell them what fuel you run? Looks like they may have made an assumption you are using 95 ron or perhaps mapped it conservatively because they didn't know.
