How many EGO sensors?

[cinquecento]

Hi..

I'd like some feeback on the best way forward regarding the number of EGO sensors for a 96 500 with a non lucas ECU. I am using Megasquirt.. but Omex, Emerald etc apply equally here.

Should I use one or two wideband sensors?. Is the AFR and injector pulse width/duty cycle likely to differ from one bank to another? I beleive they do vary.. but enough to worry about?

I have been thinking to use one EGO sensor for one bank.. and an Exhaust gas temp in the other?...

Many thanks...

[GreenV8S]

I think it will depend to a large extent which MS solution you're going for. I think if you're using MS1/Extra then you would only have a single wideband input. The MS experts would be the people to ask, though.

ETA: Oh, I see you're already using MS so you probably *are* the expert here! Um, in general the engine should be fairly symmetrical so I don't see any particular reason to need separate sensing/feedback on the two banks, but if it's available you may find you can get the engine that bit closer to a perfect tune.

Edited by GreenV8S on Wednesday 10th October 09:50

[dnb]

As far as I know, MS doesn't have built in EGO controllers. So you end up with an external TechEdge/Innovate/VEMS Round etc (delete as appropriate) wideband controller for each sensor, and the output of that fed into the MS ECU.

I use one sensor on mine. (same idea as you wideband in one side and EGT in the other - maybe you got the idea from the Growl? ). I haven't bothered with the second EGO yet, since the car runs just fine with one, and passes UK emissions tests easily. It even passes the fast idle test with no cat.

[cinquecento]

Dave and Peter...

Many thanks. Techedge are local... so I'm happy that I can get support/help if needed. Using MS-II with "standard code".. I haven't yet vertured into the extras world!!