GregW

I want to log wide-band readings to my haltech datalog.

How do I do this? What do I need. ect ect.

Who has done it?

GregW

rxrotary2_7

not to be an ***.... but a good place to start looking for info on this would be to sign up for the yahoo suport group. this has been a recent topic of discussion on there for a while. i have personaly been unsucessful with loging my fjo with a spare a/d accurately. i do have the fjo's loging capabilities and that helps. the only bad thing is it doesnt show you exact range and bar, you kinda have to figure that out on your own between two laptops. (good thing i have 2 )

jetenginedoctor

Part of the problem may be a difference in potential between the negative/ground connection on your AFM and the negative/ground connection of the ECU. This is especially likely if you're powering your AFM through a cigarette lighter adapter plug-in thinger. I learned this first-hand.

A solution? Make a nice plug-in jack for the widband, and power and ground it to the same place the ECU is. This will prevent a difference in ground potential which will skew your analog inputs as read by the ECU.

Good luck.

BK
BMEP Fuel & Tuning

rxrotary2_7

thanks. i will have to try that

wira4

I use a diy-wide band and I learnt to have to calibrate the readout on Haltech(via laptop display). I was told the wide band will output certain analog voltage before the sensor warms up. I then compare this output with the spare AD readout on the laptop. If there is a difference, I will then adjust with a pot so that the laptop reads the same as on the wide band.

GregW

Any more info out there or does everyone rely on a dyno tech.


What is an fjo? and a spare a/d

not to be an *** but using yahoo groups is as complicated as getting a wideband to work with a haltech

GregW

GregW

I joined it, we will see how it goes.


GregW

Travis R

I was told that a wideband O2 sensor wouldn't work with an e6k. What type of O2's are compatable (# of wires)?
I'm trying to find the correct O2 sensor output (in mV, read on the laptop) that equals a 12.5:1 Air/Fuel ratio.
Thanks

jetenginedoctor

Easy answer, there IS no voltage number from an OEM O2 sensor that will equal 12.5:1 AFR. If there was, why would anybody buy wideband AFMs???

BK

Travis R

So what's the point of the e6k being able to monitor A/F ratios if it is totally inaccurate?
How many people go to a fully programable ECU to increase their gas mileage?
I'm still curious about how many wires (on the 02 sensor) the e6k can handle.
thanks

rxrotary2_7

why does the amount of wires bother you? i have a 4 wire O2 sensor for the haltech to get reading from. 0-1V sensor that would read something like this. but i have an 5 wire wideband 0-5v that reads something like this for tunning. i believe there is a version of the e6k software floating around that allows for WB loging. 6.34u something. most people dont drive around with their WB in the car at all times as a replacement sensor is not the cheapest thing in the world. so to run your ECU with a WB all the time is not the most ecomomical thing to do...

Travis R

I'm curious because a wide band needs 5 wires. If the e6k can handle only 4 wires then that will only get us so much accuracy.
This is for an autocross only race car, so it doesn't see a whole lot of mileage... probably less than 10 minutes every month, including warm up.
I need to convince the car owner that he needs to invest in a WB. We're trying to tune the car in a range where the O2 sensor is completely inaccurate.
Thanks for the replys.

rxrotary2_7

you are *trying* to convince him??? what is his argument that he does NOT need one? i would like to hear his side of the argument (anything other than "a true WB cost a lot of money" )

wira4

You do not wire up the WB oxygen sensor directly to the E6K. You need to buy a wide band controller which converts the low signal of the wide band O2 sensor to linear 0-5V analog signal which can then be input into E6K for display. The most number of wires going from the controller to E6K is two: signal and ground.

If you want to use Haltech's E6K UEGO software,i.,e 6.34U, that displays the actual AF ratios, you need to buy M&W wide band controller which uses a 5 wire o2 sensor. This is the only brand that Haltech has programmed the E6K to work with. Others are incompatible.

Travis R

Well, we're only now getting into the thick of tuning it. It runs *ok* but we're definitely going to need better O2 resolution if it's going to run top notch. I'd like for him to let me build him one of the DIY-WB's. That way I'll have some experience when it comes time to do mine.
wira4, thanks for the info. That's what I was looking for. Where can I get an M&W unit? What do they normally cost?

jetenginedoctor

I wouldn't put a lot of faith into one of those DIY-WB meters just yet. I've been following the mailing lists for them for the past few months, and they certainly ARE NOT a trouble-free device. Depending on what your engine is worth to you should be the guiding factor with regards to what air fuel meter you choose to buy. If your engine is only a junkyard engine that you don't care much if you destroy, then go ahead and buy the DIY gizmo and 'roll the dice.' If your engine has some value, and you can't afford to just replace it should you make a grave tuning error guided by an unproven meter, then I'd suggest saving till you've got $1000 or so and buy a real PROVEN air fuel meter.

BK