how do you tell ifyour wideband needs calibrating or not??? is it just the DIY units that need calibrating?

 

i have the same problem with my tech edge that I sold to underpressure02 except mines read the other way (it was a lot richer than what the display showed). We verified that the techedge was off by using an FJO on the same sensor (fjo was confirmed to be accuruate via wideband from a dyno).

Chad sent back the whole kit to Australia and it's been over 3 weeks and he still doesn't have the kit back. We've checked the ground and got a good power source (basically well above the voltage that tech edge suggested).

 

Yeah my techedge was reading to lean so we kept adding fuel then we relized that it was wrong. I sent it back and the guy claimes it is still stuck in customs. I have version 1 so how can I calibrate that with my o2 sensor?

 

also where are you guys putting your sensor?? if its in the manifold thatyd account for part of the inaccurate readings

 

mine is pretty much where the stock o2 sensor is .

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by underpressure02 &raquo;</TD></TR><TR><TD CLASS="quote">mine is pretty much where the stock o2 sensor is . </TD></TR></TABLE>

putting it in the manifold where there is boost, will cause it to read richer then it actually is..thats according to techedges website

 

I've got mine 2" off the turbo (in the downpipe).

 

Well, we (Tech Edge) checked this unit and found the cable had been modified and some of the wires from the sensor were shorted out. So, there was a simple reason why the unit wasn't working.
In general we have very few failures and faults considering the number of our units out there. We're very happy to fix any units that do require attention, and we're happy to discuss any faults we do find (we even have a "fixes" page). All we ask is that our customers follow some simple rules when returning units for repair so we know the extent of the problem, what changes you've made to the unit, and that you label any packages that get sent back to us so our customs service doesn't try and charge us import duty on goods we've previously exported ;-).
And, for those people waiting for the NTK sensor prices to come down before they buy a wideband unit, we have a new model coming out in the next 4 weeks or so that will use a Bosch LSU sensor I believe is available for as low as US$50 from VW.
Sorry if this sounds like an advertisement, but I felt compelled to defend our product. (Peter)

 

WRT calibration - the default calibration usually gives quite reasonable results with most sensors. We do provide an adjustment that can give a more precise calibration, but in general it's not necessary for 95% of situations people use our unit in.

 

Yes, indicated AFR will be richer than is really the case for all wideband sensors at all pressures greater than atmosphereic. We have been doing some testing the last few days and have found the Bosch LSU sensor is less pressure sensitive than the NTK sensor. Our new wideband unit will be using the LSU sensor.

 

Which unit are you talking about when you say "checked this unit and found the cable had been modified and some of the wires from the sensor were shorted out. So, there was a simple reason why the unit wasn't working."
And what cable had been modified? Also is that unit capable of hooking up the wire for the AEM ems so that you can autotune like the fjo?

I do agree with you that you are happy to fix any units that do require attention. As far as writing warrenty repair on the box. I was under the impression that if I put the rma number on the box and wrote for warrenty repair on the customs form that I had to fill out that would be fine for customs.

 

hey, I'm local near you and learned alot about the TechEdge unit, Peter has been helping alot in this area ... perhaps I can help you as I'm in NJ ...

Also, take it offline with Peter, no need to get *public* on TechEdge like that, I'm sure it'll get resolved ...

PM me privately for help on the unit too ... I like it and would recommend it to anyone, especially for the price.

greg

 

how accurate are the pre assembled v1.5's?? within .2 ??? and how much richer does it read under boost if the sensor is a few inches away from turbo in downpipe??

 

I don't want this to be too technical, but sometimes giving a "simple" answer is just not appropriate....
It's not as simple a giving a single accuracy percentage or figure - accuracy varies from stoich where the unit should be dead accurate, to the extreme rich and lean regions which will be most inaccurate. Also, if you're using a display (you don't need to if you're data logging) there is the accuracy of the display to consider.
In general we would expect 0.2 AFR accuracy to be easily realised between the AFR limits of 11 and 20. Better accuracy than that can be acheived but then there are many environmental factors that come into play such as where the sensor is placed (ie. extremes of temperature and pressure both affect accuracy).
As we state on our website, we don't expect you to instal a wideband sensor anywhere near a turbo, and certainly not on the pressure side of the turbo. I suggest that 18 inches from a turbo outlet is as close as you should mount a wideband sensor.
It is possible to get large fractions of an AFR difference if you have more than a couple of pounds of exhaust backpressure that the sensor is reading. The differences is because the sensor works on measuring how much current is required to "neutralise free oxygen or free fuel". At high exhaust pressures more current is required because there are more molecules (they have been compressed) and that currrent is converted into the indicated AFR - so, high exhaust pressures produce higher indicated currents which translate into a richer than reality reading, or, stated another way, the actual AFR will be LEANER than indicated. This fact is why we're very careful to point out you need to mount the sensor away from any pressure as you can fool yourself into tuning too lean under boost.
Now, I don't want people to think our unit is any different to other wideband units in this respect, it's just that we think it's important people are aware of this pressure effect.
Tech Edge will be offering a future wideband unit that can actually compensate of exhaust backpressure and hence give a more accurate AFR under a wider range of operating conditions - but this is not an indication that we have any concerns about the current version 1.5 unit we are discussing.

HTH, Peter.

 

Hm... mine is about 2 inches down the downpipe from the turbo... I always thought that this was a better spot becuase you would get a quicker reading... would I be better off putting the WB in the hole where the stock o2 goes?

 

yes

 

OT - sorry to hijack your thread jeremy... but i think you might be interested too...

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Peter &raquo;</TD></TR><TR><TD CLASS="quote">Our new wideband unit will be using the LSU sensor.
</TD></TR></TABLE>

groupbuy for honda-tech members?... complete kit w/ o2 sensor?... (excluding the display)... i am sure everyone on this thread (and more) would definitely be interested...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1.8T_EG &raquo;</TD></TR><TR><TD CLASS="quote">OT - sorry to hijack your thread jeremy... but i think you might be interested too...

groupbuy for honda-tech members?... complete kit w/ o2 sensor?... (excluding the display)... i am sure everyone on this thread (and more) would definitely be interested...</TD></TR></TABLE>

more like an overflow and a one year backorder as there are a few other boards watching these threads too. lets just hope there isnt a price gouging at that

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Peter &raquo;</TD></TR><TR><TD CLASS="quote">yes</TD></TR></TABLE>

isnt that contradicting?? u just said put it like 18 inches away from pressure source..and he asks if he should move it from his downpipe to the place where thereis most pressure(manifold) and u tell him that would be best????????wth am i missing here

 

you dont get it..

im about to put the bung on my dp for my w/b... i was going to put it about 3 " off the turbo on the downpipe like lots of well knowledgable people have suggested..
now your saying put it in the stock location?????
hrmmm

 

some stock locations are different i guess... just put it like around 18 inches away and u should be all set

 

i wasnt asking you cause you dont know anything
im asking the thread orginator

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SiRkid &raquo;</TD></TR><TR><TD CLASS="quote">i wasnt asking you cause you dont know anything
im asking the thread orginator</TD></TR></TABLE>

umm ok right..i dont know anything..i'm stupid..specially since i'm restating the facts that techedge has said to do..and also falcon does..

its pretty obvious the thread originator doesnt know whats going on...same with u

 

SiRkid: How do I not get it? I'm simply re-iterating and verifying what Peter said.... read his post.

GOLDBERG: How is it obvious that I (the thread starter) don't know what's going on? What are you referring to? I'm reading the responses in this thread from Peter and everyone else and learning as I go... what's the problem?

 

he was referring to you as some kinda expert or something..and if u were you wouldnt posted this thread, right?? we are all learning about this and wondering thats why weve looked..i dunno about sirkid..hes just dumb