Wideband o2 With Narrowband Emulation

Don Abbondio Posts : 7 Join date : 2015-07-05

[You must be registered and logged in to see this link.]

Has anyone ever used one of these? I'm thinking of buying one to increase the accuracy of the AFR readings while leaving the O2 sensor in the loop through emulation. Though it's half the price of a dyno tune down the street from me. I actually found a place very close to me that offers dyno tuning maps starting at $300 ($395 for the GTRx tuned ECU). It can be fed into the spare O2 sensor lines of the 5AM, but I need to check the specs to know if it is 0-5V tolerant or just another narrow band 0-1V input. Though it is less expensive than adding a Innovative motorsports wideband sensor controller. Thoughts?

GRiSO Capo Posts : 10200 Join date : 2013-09-30

I can't help with the Spartan (though I've been looking at the SLC eval kit as a possible cheap wideband unit for forum members). Their gear looks like it might suit the DIY tuner well.

I don't quite follow what you plan to do. Do you want to keep the stock sensor connected and use the Spartan (or similar) with the second lambda input? Why?

The lambda inputs in the 5AM will accept a 0-5 volt signal. They are not narrowband limited. However, I expect you'll find the single lambda OS does not activate the second lambda input.

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
.

.
[You must be registered and logged in to see this image.]
.
In GRiSO we trust!
.

Don Abbondio Posts : 7 Join date : 2015-07-05

The device has a emulated output to replace the narrow band sensor. The wide band is mathed to narrow band and also has a 0-5V 10-20 AFR output. I haven't opened the map in tuner pro yet to know if the Lambda's are on or off yet, but this would be an option to leave the wide band sensor in even with a stock map. I have read that it is possible to record the second sensor through the ECU, but that requires hooking the output up to the ECU and turning it on in Tuner Pro.

GRiSO Capo Posts : 10200 Join date : 2013-09-30

frizzit wrote:: The device has a emulated output to replace the narrow band sensor. The wide band is mathed to narrow band and also has a 0-5V 10-20 AFR output. I haven't opened the map in tuner pro yet to know if the Lambda's are on or off yet, but this would be an option to leave the wide band sensor in even with a stock map.

I can say with 100% certainty that this will work. I am running an LC-2 in this configuration, using the simulated narrowband output to trim via wideband sensor. You will need a dummy load across the ECU heater circuit, otherwise it will throw an error. The ECU uses current sensing to monitor the stock O2 sensor. See this thread: [You must be registered and logged in to see this link.]

Quote :: I have read that it is possible to record the second sensor through the ECU, but that requires hooking the output up to the ECU and turning it on in Tuner Pro.

Again, I'm certain this won't work with a the 5AM running the single lambda firmware. The firmware isn't configured for the 2nd lambda. You can only modify the code in the flash memory with TunerPro. I would like to be proven wrong though.

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
.

.
[You must be registered and logged in to see this image.]
.
In GRiSO we trust!
.

Fra Cristoforo Posts : 477 Join date : 2014-01-07

Tell me who writes this nonsense. If you want two lambdas, then the two lambda ecu map is needed, and the lambdas should be left and right mounted, and give similar signal. Not one stock and one wideband.
And it needs changing connections to the ecu in the connector.

But for almost everyone here, this is much to complicated to make it successfull.

This is also funny:

Quote :: $300 ($395 for the GTRx tuned ECU)

Hardware isn't changed with gtrx, it's just another map, like we do. So why charge more?