Wez Posted February 8, 2003 Share Posted February 8, 2003 Hey Guys, Just wondering if anyone has had any experience with this, sounds pretty good and is fairly well priced and could also be used to interface into AEM, Motec and Autronics for automapping and reliable tuning. http://www.lambdaboy.com It also has its own software so you could compare the output from the sensor to the raw data your ECU is seeing which would make calibration a bit easier. Regards Wez PS the website has lots of info on it aswell. Quote Link to comment Share on other sites More sharing options...
Adam W Posted February 8, 2003 Share Posted February 8, 2003 That looks pretty good. Another one to check out is the FJO wideband setup which has got a consistently good rep and has been recommended to me by a couple of people who I respect. The FJO is about $700 I think . . . does anyone know how the two compare? Quote Link to comment Share on other sites More sharing options...
Wez Posted February 8, 2003 Author Share Posted February 8, 2003 Hello, Is this the wideband you mean? http://www.fjoinc.com/automotive/WBO2details.htm#wbo2rpm Looking at it briefly this wideband has an output range of 0 - 5V compared to the Lambdaboy 1.8 - 2.8V. I was told that 1.8 - 2.8V would give you 200 points of reference through 1V so therefore the 0 - 5V would give you 1000 points of reference, I would guess that 200 is more than enough for fine engine tuning. Someone please correct me if i am wrong. Regards Wez Quote Link to comment Share on other sites More sharing options...
Adam W Posted February 8, 2003 Share Posted February 8, 2003 That's the one. No idea about the technical stuff you mention, doesn't sound critical to me though as you say. I'm more worried about absolute accuracy (including over the long term), reliability, and self-correction as the sensor degrades over time. Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted February 12, 2003 Share Posted February 12, 2003 I was told that 1.8 - 2.8V would give you 200 points of reference through 1V so therefore the 0 - 5V would give you 1000 points of reference, I would guess that 200 is more than enough for fine engine tuning. Umm? The wideband sensors have a more linear output characteristic than the narrowband. But they pretty much give the same outputs. This sounds more like the signal conditioning circuitry is amplifying one WBO2 sensor to be in the range 1.8->2.8 and the other 0->5V I don't think it neccessarily holds that if you have 200 points for the 1.8->2.8 you can interpolate this and get 1000 points for the 0->5V one. It's all down to what is measuring the voltage. Most of these devices will use some form of analogue to digital converter and it's this arrangement that determines the resolution accuracy of the WBO2. So for an 8bit ADC you get 256 points. But it might be that they arranged it so that not all the available range is used by the ADC and therefore the WBO2 output only covers 200 points and not the full 256. Given that you use the same 8 bit ADC with the other sensor 0->5V and adjust the input of the ADC you'll still get 256 points. Only when you go for a larger bit width ADC will this increase. e.g. 10bit ad you get 1024 points. So all in all you need to ask "What is the min and max AFR range?" (e.g. 0.7Lambda to free air) "What resoution does the device have" (0.05Lambda steps) Forget about exact voltages, they are meaningless without the relationship to the AFR. Regards Pete Quote Link to comment Share on other sites More sharing options...
Wez Posted February 12, 2003 Author Share Posted February 12, 2003 Hey Pete, Here some more info for you :- Range - 8 to 24 AFR Response Time - 0.10 seconds Accuracy - 1% at 14.7, 2% full scale on RS232 output Analog Output - 1.8 to 2.8V, 8 to 24AFR Analog Output - 0 to 1V simulated EGO sensor output Kit Contents :- LambdaBoy Meter, NTK UEGO Sensor, 6' Sensor Cable, PC serial data cable, PC software disks, 15' power supply cable with clip connectors. Pete have you not thought about making a wideband controller? I am sure you would sell a few if they were in the right price range. Regards Wez Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted February 12, 2003 Share Posted February 12, 2003 Pete have you not thought about making a wideband controller? I am sure you would sell a few if they were in the right price range. Yes. And I made the DIY EFI version of the WBO2. But the NTK sensor is mega expensive. Bosch do a wideband sensor that is 1/2 the price but finding out how to properly use it is proving difficult. It's definitely on the cards. Pete Quote Link to comment Share on other sites More sharing options...
Wez Posted February 12, 2003 Author Share Posted February 12, 2003 What is mega expensive? I thought they could be sourced for approx 150 USD as the honda 1.5 lean burn engine uses them as a stock sensor. Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted February 12, 2003 Share Posted February 12, 2003 compared to the Bosch ones at £60! USD to Pounds normally works out to be the same when you've paid the duty. This is assuming it was a commercial venture and you have to pay all duties. I'm sure the individual could source one for the dollar equivalent if sent on it's own in a plain jiffy bag. Pete Quote Link to comment Share on other sites More sharing options...
Nathan Posted February 12, 2003 Share Posted February 12, 2003 Originally posted by TRL Performance compared to the Bosch ones at £60! USD to Pounds normally works out to be the same when you've paid the duty. This is assuming it was a commercial venture and you have to pay all duties. So true!! Tell that to all the people that compare HKS USA prices to UK ones!! Pete, what problems do you have with the Bosch sensor? Thats the one we use with our Motec wideband and I thought it was a pretty standard heated sensor? Cheers, Nathan TDI PLC Quote Link to comment Share on other sites More sharing options...
THOR Racing Posted February 12, 2003 Share Posted February 12, 2003 Pete, what problems do you have with the Bosch sensor? Thats the one we use with our Motec wideband and I thought it was a pretty standard heated sensor? No, you misunderstand The difficulty is finding enough information about the sensors heater characteristics and drive current and voltages for the Nurnst pump Cells inside. Great if you have a Motec as they've done the research and have electronics which work with multiple WBO2 sensors. Not so good when you are trying to make one yourself from stratch. That's all I meant. I have a datasheet from Bosch and it's a little difficult to follow. assumes you know how to interface to them in the first place. And the DIY EFI WBO2 project won't work with it. Or rather I'm too scared to try and waste £60 a pop. I'd rather learn how they are meant to be driven first. It may be possible to modify the DIY EFI version but again it assumes you fully understand the WBO2 technology. I'm sure is not rocket science, but somethings always hard until you learn about it. Then a big fat "Doh!" reverbs around the room!!!! Pete Quote Link to comment Share on other sites More sharing options...
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