I want to build my own wideband using the kit from www.diy-wb.com. However, I want to use the cheaper Bosch LSU-4 sensor instead of the NTK L1H1.

Does anyone know if the schematics they give will work with the LSU-4 sensor? They don't mention the LSU-4 anywhere on their site so I am assuming not. If not, does anyone know where I could find alternate schematics that work with the LSU-4?

 

The WBO2 (TechEdge) is known to work with that sensor -- that's what I'm planning on using.

http://www.wbo2.com

 

I realize the Techedge works with that sensor but I plan on building my own wideband from scratch using the directions from www.diy-wb.com.

The total cost is much lower than ordering a kit from www.wbo2.com.

The cost of the PCB board+parts via www.diy-wb.com is something on the order of $30. However, the schemetics they provide require the use of an NTK L1H1 sensor which is quite expensive ($120+).

If someone knows of a modified schematic that works with a Bosch sensor, the total cost of a complete wideband (including the sensor) would be under $100.

In comparison, the Techedge costs at least $200.

 

If you can't afford the NTK sensor you might be getting into the wrong kind of hobby, I can understand that you want to save money, but at what cost !?? Do you want to trust your motor to an inferior sensor... after all you usually get what you pay for.... as well as, where else are you cutting costs... a new engine is more expensive than the sensor, to say the least.

Tuning is also not the cheapeset... and did you know that the wideband sensors (all of them) loose accuracy over time !? Approx.(30k mi) and therefore need to be replaced !? I would do some more reading before I'd jump into this headlong...
Also concider paying a bit more for tuning, and have them provide the wideband for a fraction of what a good one would cost....

 

> If you can't afford the NTK sensor you might be getting into the wrong kind of hobby, I can understand that you want to save money, but at what cost !??

I can very easily afford the NTK, but I like to understand WHY I am paying more money for something before I join the bandwagon.

> Do you want to trust your motor to an inferior sensor... after all you usually get what you pay for.... as well as, where else are you cutting costs... a new engine is more expensive than the sensor, to say the least.

I realize the Bosch LSU-4 is less accurate than the NTK. But, I believe the NTK is only 1.5% more accurate than the Bosch. This really only makes a difference for laboratory testing, not for car tuning. And yes, it is affected by high heat, but I know many people have had success with the sensor when placing it near the end of the downpipe.

> Tuning is also not the cheapeset... and did you know that the wideband sensors (all of them) loose accuracy over time !? Approx.(30k mi) and therefore need to be replaced !?

I believe both the NTK and Bosch sensors are supposed to last 500 hours on unleaded fuels and less than 50 hours on leaded fuels. But, in practice, the lifespan can vary significantly depending on the environment its in. This is exactly the reason why I am looking into the LSU-4. I'd rather replace a $50 sensor multiple times than a $120 sensor.

> I would do some more reading before I'd jump into this headlong...

That is a good suggestion and I will continue reading as much as I can...

> Also concider paying a bit more for tuning, and have them provide the wideband for a fraction of what a good one would cost....

I do plan on getting it profesionally tuned, but I'd like to be able to monitor A/F ratios and make small changes if necessary.

 

the original DIY WB doens't have digital temperature control for the LSU sensor. That is why techedge released version 2.0 since it produces more accurate more consistent values.

You can buy their 1.5V which is an improved version of the original DIY WB for much less then the version 2.0 they are selling.