Is anyone running dual WBo2 sensors? I am going to be installing a megasquirt eventually and was thinking of replacing the NBo2 sensors in the headers with WBo2's hook them into the dual WB inputs on the Megasquirt-II. Would there be any benefit to this. When I was reading about returnless fuelsystems some members were mentioning that the flow/pressure for the front injectors were not the same as the back injectors, would this mean I would benefit from being able to tune the AFR for each bank or is it not worth the extra $100 for the seconds WB and controller?

 

Would it be more accurate to tune fuel in each bank rather than the whole motor? YES

Would it be worth the extra money for the other sensor? DUNNO- To the best of my knowledge, no one here has done that, so there's no way to know if there is a NOTICEABLE difference bet'n the banks. I dont think the difference would be significant however. But I do see this setup being very useful when it comes to diagnosing bank-specific ECU codes.

Good question tho, anybody else can shime in on this subject??

 

this is the kind of thing that you cant really know until it is tested. once we know if there is a significant difference between the banks we will know if it is worth it...

 

ms can run 2 wb , its like controling each bank ..

i only have one tough. if i were you id go for 2 innovative lc1 ...

 

If you have the money, go for it, if not; A one o2 sensor car will run just fine.

 

I was thinking about building 2 JAW controllers and use those bosch WBs that are in the 1.8 jetta's, they are only $50 from autozone

 

it might be good, its a diy ...

not that i discourage diy :P

but remeber o2 wb is your eyes when it comes to tuning .. if your on tight budget id get only one lc1 ,

 

its not so much a budget thing, I just enjoy working with electronics and diy always teaches me more than just buying something plug+pray

 

thats true, true
you can buys a lc1 , built a jaw , compare each other ,
if its accurate then sell the lc1 to a friend or member

heres a great article on wb
http://www.fordmuscle.com/archives/2...tout/index.php

 

I tuned my car individually for each bank (using EU) with only one WB sensor...

 

do you have access to the results page?

 

I would prefer to not have to do a chinese fire drill with my o2 sensors but I see how that could get the job done

 

i had few weeks ago , i guess they change their policies . think u have to suscribe

 

dan, are you able to set fuel trims for each individual cylinder with EU?

 

Yes, there's an individual map, contains a row for each cylinder which is an offset to the I/J maps, across 16 rpm points.


It's 2 sensors... not that difficult really.

 

?? 2 sensors to one controller, is that what you are doing? do you have a switch hard wired so you can flip back and forth?

 

plug and unplug with the wires to the unit sounds pretty easy to me

 

i dont know how eu work deal whit this but

i dont see the point to tune 2 bank individually , if once its running you have only the feedback from one wb sensor

 

No, 1 WB sensor, 1 controller. Swap it between banks and tune in 2 iterations. Run the narrowband output from the WB to the stock line to keep the ECU happy at idle/partial throttle.

When I said it's only 2 sensors (in response to your fire drill comment) I meant it's not that hard to switch out each NB for the WB sensor one at a time, you only have to do it twice.

 

so you have your primary fuel trim map, and then 6 extra maps that offset each individual injector, if desired or necessary, from whatever the primary map has them doing?

 

http://kevlo911.ic3donline.com/images/ijmap.JPG

Looks like that

 

After tuning each bank individually one would assume he moved the WB to a normal location (after the y join) to monitor both banks as a whole. Even if you can't see what each bank is doing all the time with two WBs, you've still got the better tune.

 

o2 sensors arent used for any feedback style tuning/adjustments?

 

They are...what do you mean?

 

Ok I cant shed some light on this too. If its been said im sorry! Ok the back bank runs richer due to the way the fuel rail feeds the gas in. It enter through the back rail which allow the rear injectors to rob most of the fuel. But you can look in the FID stickes and do the cheap rail mod to help this problem. Ok on adjusting each banks fuel I see it making it more balanced but I dont think it would make but a few horsepower increase. maybe 2-5. But I could be wrong though too.

 

i mean i understand the benefit of doing a static tune for each bank with 1 wbo2 but don't engine conditions change thoughout the rpm range, or driving though different areas/terrains where air temp + air pressure + differ... can't the wbo2 help in _live_ adjustments?

 

Use the WB to tune for WOT conditions. Tuning each bank separately.(2 iterations)
When WOT tuning has been taken care of: