MG_MR2
Thanks, appreciate it, I can't PM yet, something to do with being a new member/not enough posts or time I assume. That is interesting though, in essence the range wouldn't allow the ECU to make small changes to fuel delivery to ensure the AFR is optimum? In which case by putting a wide band sensor on as well is that only effectively giving you an AFR reading but no real way to use that to adjust ratios?
If you can’t PM yet and use Facebook messenger, go to the website I linked above and then the contact us page, I have a Facebook messenger app installed on the site, can reach me directly that way and send me your phone number there if you want me to call for a chat. ;)
Yeah what narrowband is really used for from my understanding is sorting out optimal fuelling for when a cars stock ECU is using closed loop. This is normally when manifold pressures are in cruise ranges etc. You will have to forgive me as I am a wideband guy, but that’s my basic understanding. Narrowband have, as the name suggests a much more narrow range of detection, but they do still have a range. These wideband controllers output a Narrowband signal stock ECU’s understand, but it’s locked and doesn’t move like a normal narrowband sensor signal would, so really the simulated narrowband output from these wideband controllers that gets sent back to stock ECU’s is just to stop the car going into fault mode and cracking the ****s from not being able to detect the sensor is present and functioning.
So yeah, the downside of removing the stock narrowband sensor is you may end up with slightly worse cruising around town fuel economy because the stock ECU is no longer receiving a real narrowband signal to finely adjust fuelling accordingly. But again if it was me, I would most likely just leave the stock narrowband and add the wideband in to keep things simple.
Yes, basically there is a couple of uses and reasons for a wideband. The first is just for the readout, on a stock car most wouldn’t need one, but if you have a turbo car even with the stock ECU and you are doing things like upping the boost, you really want to be able to see the AFR’s, as you could go too far with the boost and your stock ECU, injectors, fuel pump may not be able to cope and the car could lean out. This way you can be sure the car is fuelling correctly even with the mods, more boost etc ect.
The next use for them is when you have an aftermarket ECU, this is when you can send a wideband output directly into the ECU, this can be used for auto tuning features in the ECU, can be used for closed loop fuel control as well as you having the visual readout to make sure you aren’t about to blow anything up lol.
So if you have a stock car with stock ECU, and not doing any mods that could affect fuelling, then a wideband isn’t necessary.