Wiring in wideband to 808 ecu

[V8hilux]

So I basically just tune the ve tables with the wideband, then run off the old standard narrow band? (Wideband now becomes obsolete/useless to ecu?)
Then all the wideband is good for is just for me to glance at every now and then to see what it's doing while driving?

Would the wideband ve learn tune the cars ve by just going for a drive? What would happen if i left the simulated narrowband hooked up?

Thanks huys.

[delcowizzid]

log it and see how it goes the ecu may just spit codes or have very funny o2 sensor swings most people i know have pulled there hair out trying to get narrowband sim to work as it should on pretty much most controllers you wont need it when in wideband mode anyway

[V8hilux]

So do I even need a narrowband hooked up if I have the wideband analog out going into the pin D8 ?

Will the ecu just see the wideband and ignore narrowband signals. Can I turn the narrowband off in the ose12p and just use the wideband for everyday running of the car?

what setting would i turn on/off in flags etc to do this.

What is the best way to run the car? wideband/narrowband? not sure here what to do... too many options ha ha.

[delcowizzid]

i would run both when tuning and take the wideband out when you have finished and just fit it when you want to do some further tuning mine all just plugs in the ciggy lighter so it can go ffrom car to car easy and my sensor lasts ages as its not in there getting hot for no reason .avoid having the unit power up on cold start untill you have purged all the first wave of moisture out the exhaust the sensors dont like getting cold water on the heater element

[V8hilux]

So does the normal narrowband read rich mixtures like 11 AFR accurately. This is in a turbo car so the plan was to set up the boost region of ve tables at 11 AFR to start with and see how it went.

I might disconect the narrowband simulation and re wire the original narrowband back into D7.

I will have a quick play with the wideband ve learn in the 20-100 kpa range with light load and see how it goes. If it doesn't look good, I will turn off the wideband ve learn and just set the ve table by the normal way. (is it possible for Wideband ve learn to build the entire ve map? or just the stoich range)

I have no other use for the wideband... So If I decide to risk buggering up the sensor, could I just leave it in so I could keep an eye on the AF ratio just for curiosity sake, while the ecu runs off the original narrowband. (that's if the narrowband can handle the rich boost AF.

If I decide to leave the wideband in the exhaust,(in a seperate bung) can I just turn off the wideband flags in the 0se12p or would I have to disconect the wideband from the d8 pin all together?

I was going to put the wideband about 1 metre downstream from the turbo. right before where my cat convertor should be.

Thanks for all the info.

[delcowizzid]

the narrowband only works at light throttle cruise anywhere the fuel ratio table says 14.7.it will read high volts on boost but its not used for anything fueling up there wideband ve learn will work everywhere and will seek target a/f ratio as set in a/f table but ide start by setting ve rich so it leans out to target not richens to target.over 10psi target 11.5 untill max torque ie when the but dyno feals torque fall then lean it out to 11.8-12:1 up top higher in the revs to get max HP upto 10psi can go 12:1 the whole way through the revs on boost but each engine is different it may like to or need to be richer to stem knock

[V8hilux]

the narrowband only works at light throttle cruise anywhere the fuel ratio table says 14.7.it will read high volts on boost but its not used for anything fueling up there wideband ve learn will work everywhere and will seek target a/f ratio as set in a/f table but ide start by setting ve rich so it leans out to target not richens to target.over 10psi target 11.5 untill max torque ie when the but dyno feals torque fall then lean it out to 11.8-12:1 up top higher in the revs to get max HP upto 10psi can go 12:1 the whole way through the revs on boost but each engine is different it may like to or need to be richer to stem knock

The light bulb just came on!!! ha ha.

So the narrowband sensor does not controll fuel mixtures at all times the car is going... Untill now, I didn't realise that.

So by setting the ve tables, we are cementing in a set formula for fueling...pulse width = blah blah, at each load point and revs in the maps. Have I got this right.

I was wandering what would happen if the 02 sensor shit itself halfway through a boost run. lol.

And the narrowband just keeps the engine at stoich when we are in closed loop? So the only time the engine is relying on the 02 sensor is in closed loop? and at all other times, the AF ratio always comes from the ve tables/pulsewidth/etc.

Am i figuring this out right or am I way off. Now I see why you don't need the wideband after tuning... it doesn't change any fuelling unless in wideband ve learn mode.

When you say to set the ve rich and let the wideband lean it out, do you mean to set the ve tables manually at something like 150% VE or something and then let it work at it.

What settings in the ose12p should i be interested in setting/playing with to get the wideband ve learn setup for an automatic ve tune?

I know where the part in 12p is to turn wideband VE learn on... anything else i should do?

Thanks

[delcowizzid]

omg winning LOL yeah mate thats how she works o2 just works at cruise so you allways have good economy even when the engine gets wear and tear will keep itself trimmed nicely then the WOT fueling is pretty much set in concrete and as long as you have all the air temp correction tables etc right it should allways run at the right a/f ratio no matter the weather or feet above sea level .this is where you make up some power with stock engines they set the fuel ratios for a nice tight engine and set it rich for safty over a long period of time so it can allways be improved

[V8hilux]

ha ha.

A lot of things didn't make sense till now. ha ha.

So while the wideband ve learn is on, should i be turning things off like temp corrections or other corrections etc as to help the ve learn get a better read?

if so, what exactly should i be turning off?

Will I need to also find a good maths/physics forum and learn Calculus, as a supplement to delcohacking to figure out how to adjust the corrections for weather...? lol.

Or could i just run with the figures that came in the ose12p v11 download??

Cheers.

[delcowizzid]

take a look at my v6 turbo base bin in the custom bin section theres one table thats blank in the 100-200kpa range % coolant calculation contribution or the like table its guessed prettuy much but works well do the same to the v8 table then adjust ve untill its got good a.f ratio's on boost and monitor changes in ratio over a few weeks of differing weather if ratio doesnt wander its all good to go