Nistune Forums

Hi!

Question nr 1: Is it possible to change the lambda value of 14.7 that the ecu strives to match in closed loop. Example I would like the closed loop to try and match 12.5 AFR

Question nr 2: How do I increase the RPM scale in the fuel and timing map. I would like to be able to rev to 8200

Regards

John

Q1 I don't know for sure in nistune how to do it, but I know the Zeitronix Wideband will give out a fake Narrowband signal for the ECU to use, it can be set at whatever AFR you want. BTW a narrow band )2 sensor will never be able to make out wether your at 10 or 12.5

for the sencond Question you have to readjust your rev limiter 1st then the fuel and timing RPM scale (2nd section in nistune)

please note that if you change those values, you'll need to expand your actual fuel and timing maps as the AFR and timing values won't follow the changes in RPM scale

the O2 sensor itself is sending the voltage signal around 0.5 volts at 14.7:1 so you cant make it read richer unless using a third party unit which can be reprogrammed to simulate differently

see the mapping guide and tuning guides in relation to RPM scales. you can change the limiter and scaling tables to suit