DIY WB input voltage

[Maxtor]

For those of you that have the DIY WB02 - where did you tie into for input voltage? Is it picky about where you get input voltage (i.e. cigarette lighter)?

Second - I know it is "best" to place the sensor as close to the rear of the turbo as possible - but will the bottom of the down pipe (just before the CAT) give accurate readings?

Thanks in advance. I'm about 95% done with the kit, hope to wrap it up this coming weekend.

 

[leroy]

I tried the cigarette lighter for awhile, but couldn't get consistent results. For my portable one, I have some alligator clips. The battery is a good source, but I've also had good luck at the fuse box.

I think your placement will be fine. The sensor is heated, so you shouldn't see any big difference, unless you have an exhaust leak.

Jim

 

[Falco]

My one is also a bit closer to the cat than to the turbo and I'm happy with it.

Peace,

 

[Maxtor]

Thanks, guys. There is definitely more room towards the end of the down pipe - glad to hear that location will work.

Too bad about the cigarette lighter for a power plug - that would have been too convenient.

Thanks again.

 

[spooldup]

can someone explain the point of having a wb02 besides being able to see exalty what the 02 value is? What i mean is it seems like a waste to put this o2 in. Why not check your plugs to tune? If i am right after you dial in the truck you should not have to change it right? I must be missing something here. :-?

 

[leroy]

can someone explain the point of having a wb02 besides being able to see exalty what the 02 value is? What i mean is it seems like a waste to put this o2 in. Why not check your plugs to tune? If i am right after you dial in the truck you should not have to change it right? I must be missing something here. :-?

You can get in the ballpark a lot quicker if you know what your air/fuel ratio is. It is especially useful, if you're making big changes like cam or injectors. I think it's easier to look at a voltmeter, or a diacom/datamaster log than to pull plugs.

Jim

 

[2cold]

I've only used WBO2 a couple times on my truck but I used a fully charged battery in the passenger side footwell and hooked it up to that.

 

[TurboTony]

The DIY w/b needs approx 13.5 volts to work accurately. You need to hook it up to a reliable voltage source.

I used a 30 amp relay from the alternator stud to power mine. Its a bit of overkill, but i wanted a clean voltage source.


Tony

 

[JoeLutz]

Jim,
Since the wb O2 is heated, do you think it would be ok for a portable one to be mounted in a piece of pipe and coupled to the tailpipe temporarily using somekind of flexible hose for dyno tuning as long as it seals good? This would eliminate removal of the stock O2 or the need to weld in a new bung.
Thanks

 

[2cold]

yes, that works. That's the way the one I was using was, I just ran the cable through the corner of the rear hatch no problem.

 

[JSM]

If you are looking at doing this on your own truck, and it will be installed for a bit, why not take out stock o2, put in wb, and change closed loop enable temp to max (hence always open loop)

you don't want closed loop playing with things when you are tuning anyways.

wire can run under cowl, through door, with ease...

stock o2 sensor is just a paper weight, compared to wb

 

[leroy]

I have a portable wb mounted on a short piece of pipe. It has a J-shaped piece of metal welded on the side. I can clamp it around the exhaust pipe. I've had mixed results. The exhaust size and design seems to affect it some. Probably too easy to get fresh air mixed in. A longer pipe may help.

It's also not accurate post-cat.

Jim

 

[JoeLutz]

Thanks