[CBR335]

As the extremes are being pushed and tunes/hardware become more aggressive, safety is of the highest priority right? Along those lines, I'd like to hear opinions from forum members of the subject of wide band AFR monitoring and integration. From other threads and boards it is obvious that this is being considered and implemented by the tuning/enthusiast community, Shiv and others.

1) For you guys running wide band AFR sensors for extra safety, are you running single or dual sensors?

2) Where are you placing the sensors in the exhaust? DPs etc.

3) What monitoring equipment/tune integration/failsafes are being employed or are planned?

If a single setup, will this be adequate to ensure safety at high boost (20+) or with NOS? Or, should both cylinder banks be monitored simultaneously?

Interested to hear input. Thanks.

[Former_Boosted_IS]

I use the FJO wideband that supports up to 6 sensors. It has leanest channel output available. I bought this for flexibility, but at this point I feel the need only to monitor one pipe. Will I upgrade at some point? Maybe but with such a small shot of nitrous I don't feel the need yet.

FJO has some significant advantages. High speed datalogging (I am seeing around 30 samples per second) and a high speed digital databus connector for your gauge or safety device. It is a superb piece.

[CBR335]

Thanks FBIS as usual for replying on both forums with insight and no BS. We can all learn from each other to make our tuning safe. I for one am installing a safety net first and pushing the edge second.....

I would still like to hear the input of others regardless of tuner preference.

Shiv, others?..........

[Fried_rice]

I just purchased my 335i and this will be the first mod I do to the car. I wouldn't think of tuning a car or running a pre-tuned map without one. I've used the NGK Powerdex on my supra and SC300 and plan to do the same with the 335i. It allows for the NTK sensor which is tough enough to survive leaded gas. Another option that would work for 99% of people is the AEM wideband, it's around $200. One sensor has worked for me in the past with 800RWHP, so I'm confident it is sufficient.

[OpenFlash]

Originally Posted by CBR335

Thanks FBIS as usual for replying on both forums with insight and no BS. We can all learn from each other to make our tuning safe. I for one am installing a safety net first and pushing the edge second.....

I would still like to hear the input of others regardless of tuner preference.

Shiv, others?..........

I installed a Innovative LC-1 a while back. Only in one bank (bank1) so it's not exactly ideal for monitoring pushing the edge. Now, I we've rigged up the Procede to read/display/log both factory wideband sensors. Currently, I'm in the process of mapping out the DME's AFR target at all engine speeds (above 10psi). So when above 10psi, any deviation from those AFR target can be considered lean-run. Then a boost-cut/valet mode will be triggered when AFR, on either bank, goes X% leaner than the target for Y milliseconds.

Below a log of factory wideband lambda bank 1 and 2 superimposed on the same graph. You can see both banks reading nearly identical to each other. The only think worth mentioning is that it represents the lambda/afr that the DME perceives, not actual (post wideband-bias effect). So it's not accurate in terms of absolute numbers. But it is perfect for knowing when the DME target isn't reached which, arguably, is more important.



Shiv

[Former_Boosted_IS]

Originally Posted by shiv@vishnu

I installed a Innovative LC-1 a while back. Only in one bank (bank1) so it's not exactly ideal for monitoring pushing the edge. Now, I we've rigged up the Procede to read/display/log both factory wideband sensors. Currently, I'm in the process of mapping out the DME's AFR target at all engine speeds (above 10psi). So when above 10psi, any deviation from those AFR target can be considered lean-run. Then a boost-cut/valet mode will be triggered when AFR, on either bank, goes X% leaner than the target for Y milliseconds.

Below a log of factory wideband lambda bank 1 and 2 superimposed on the same graph. You can see both banks reading nearly identical to each other. The only think worth mentioning is that it represents the lambda/afr that the DME perceives, not actual (post wideband-bias effect). So it's not accurate in terms of absolute numbers. But it is perfect for knowing when the DME target isn't reached which, arguably, is more important.



Shiv

Shiv good stuff on the update. Any plans on allowing your LC1 0-5V or concievably any wideband like my FJO input into the tune? It would make for a great AFR failsafe.

[dzenno]

Originally Posted by shiv@vishnu

I installed a Innovative LC-1 a while back. Only in one bank (bank1) so it's not exactly ideal for monitoring pushing the edge. Now, I we've rigged up the Procede to read/display/log both factory wideband sensors. Currently, I'm in the process of mapping out the DME's AFR target at all engine speeds (above 10psi). So when above 10psi, any deviation from those AFR target can be considered lean-run. Then a boost-cut/valet mode will be triggered when AFR, on either bank, goes X% leaner than the target for Y milliseconds.

Below a log of factory wideband lambda bank 1 and 2 superimposed on the same graph. You can see both banks reading nearly identical to each other. The only think worth mentioning is that it represents the lambda/afr that the DME perceives, not actual (post wideband-bias effect). So it's not accurate in terms of absolute numbers. But it is perfect for knowing when the DME target isn't reached which, arguably, is more important.

Shiv

cool stuff! I know the procede reader software has the ability to rescale graphs...is there any way to rescale this with this multiplication factor of 14.7 and expand vertically the graph where the AFR curve is active (on WOT)?

[OpenFlash]

Originally Posted by dzenno

cool stuff! I know the procede reader software has the ability to rescale graphs...is there any way to rescale this with this multiplication factor of 14.7 and expand vertically the graph where the AFR curve is active (on WOT)?

Yep... easy. Just multiple the min and max converted numbers in the channel configuration window by 14.7. It will then read in terms of AFR.

Shiv

[dzenno]

Originally Posted by shiv@vishnu

Yep... easy. Just multiple the min and max converted numbers in the channel configuration window by 14.7. It will then read in terms of AFR.

Shiv

Ok...is this signal 0-5V that procede is looking at or 0-2v? From the graphs it seems max is 2V?

[OpenFlash]

Originally Posted by dzenno

Ok...is this signal 0-5V that procede is looking at or 0-2v? From the graphs it seems max is 2V?

The numbers don't represent a voltage signal. They are nominal values read from the CANbus.

Shiv

[cn555ic]

Originally Posted by shiv@vishnu

Yep... easy. Just multiple the min and max converted numbers in the channel configuration window by 14.7. It will then read in terms of AFR.

Shiv

Can you show a image shot of what needs to be inputed into the channel configurations? It would make it easier for people to understand!

[Fried_rice]

That's pretty cool that the stock engine has wideband sensors. As far as calculating the AFR's, just multiply the 1.0 or .8 on the wideband readout graph by 14.7( I think that's what he meant).

For instance at 6 seconds it seems to read 16.5 lbs of boost and roughly .8 on the wideband graph. 14.7 * .8= 11.76AFR

That would be badass to have a can gauge like prof-efi.

[Ironring Racing]

Shiv,

It looks like you've got channels "Can Cool Temp" and "Can Knock" reconfigured to read the OEM wideband lambda sensors. Is this something we have the ability to reconfigure ourselves, or is it a custom mapping setting?

If we can do it, how?

[OpenFlash]

Originally Posted by Ironring Racing

Shiv,

It looks like you've got channels "Can Cool Temp" and "Can Knock" reconfigured to read the OEM wideband lambda sensors. Is this something we have the ability to reconfigure ourselves, or is it a custom mapping setting?

If we can do it, how?

You can reconfigure how the numbers are scaled (lambda or AFR) by adjusting the converted data.

Shiv

[Ironring Racing]

Originally Posted by shiv@vishnu

You can reconfigure how the numbers are scaled (lambda or AFR) by adjusting the converted data.

Shiv

Are you saying "Can Cool Temp" and "Can Knock" are currently are displaying lambda bank 1 and 2 by default in the public software?

[OpenFlash]

Originally Posted by Ironring Racing

Are you saying "Can Cool Temp" and "Can Knock" are currently are displaying lambda bank 1 and 2 by default in the public software?

Yes. We will add new appropriately named channels for them in the next user software release. But for now, we just put them in two of the lesser useful CAN channels.

Shiv