Glad this topic has come up. I planning on getting a wideband afr gauge when i get my breathing mods on my n/a (rolla mani,induction kit,possible custom exhaust mani, full exhaust and decat)
If i get a rrfpr will it possible to tune it myself. Or is it something that absolutley needs to be done by a pro?
Thanks
Yes, you can tune it yourself. No, it isn't hard.
Hit boost, watch gauge, too low? turn up. Too high? turn down.
The big difference between running it up yourself or running it up on the dyno is with a basic wideband gauge you can't log a curve against revs.
Buy an Innovate LC1 with a gauge, that way you have all the benefits of a gauge (instant viewing, no setup required) but the ability to log to your laptop for far more precise adjustments.
Off boost at idle and cruise/light load you should be at 14.7 afr due to the closed loop operation of your standard narrow band o2 sensor. This means that if your sensor is reading 'rich' e.g anything less than 14.7, your ECU will pull fuel until it's bang on the money. 14.7 is NOT 'more safe' than 15 or 16, just the best compromise between the different exhaust emissions caused by your car. On boost your afr on a stock ECU will be anything from 12.5 - 10 varying across the rev range. Your target for full boost/high load should be 11.5 - 12. You probably won't need much adjustment to achieve this depending on your setup.
