The OEM oxygen sensor is a wideband! Just monitor it via the OBDII port using a scanning tool.

 

For those that are using E85, the reported AFR will be inaccurate, because it's assuming that you are using gasoline with a stoichiometric ratio of 14.6. So you will be running slightly leaner than reported. You can easily correct for this.

Please correct me if I'm wrong.

 

It reads in lambda. The AFR reading will be accurate regardless of ethanol content.

 

I agree that the sensors read lambda - and lambda is independent of fuel type. But from what I understand when converting from lambda values to traditional AFR values a conversion factor has to be used. This conversion factor is dependent on fuel type.

So for example when I'm using DashCommand or ScanXL, the program is taking the actual lambda value and calculating AFR by multiplying lambda by the stoichiometric ratio of the fuel that it thinks I'm using (in this case gasoline ~ 14.7). So if you are using something different than gasoline this number will not be accurate.

The best thing is to just monitor lambda directly.

 

Because it's lambda (reading oxygen levels) it will always reflect 1.0 for the perfect mix. That is then converted to an A/F ratio. So long story short, the reading mechanism is completely accurate and usable for any ethanol mix. Just keep in mind you can run ethanol much leaner more safely than petroleum. E85 mixture air/fuel ratios of 13.5:1 are OK at higher RPM IMHO.

 

So is the Bavarian Cable on Burgers website going to delete cell codes automatically for catless downpipes like the Can Tool does? Or do you have to delete them manually in the software? I see the can tool is gone on the site now and has been replaced. Anyone using it so far with catless downpipe?

http://www.burgertuning.com/scanner.html

 

+1

 

Saw/heard Terry's 1series at Strasse today. Beastly!

 

Is that because of the cooling effects of ethanol? I have been reading that running leaner with E85 is much more forgiving that gasoline.

It's funny up until recently I've always thought that ethanol was the worst thing you could do to your engine, I guess that was just propaganda.

 

No, it does not work like that.

The bavarian technic is a software program run on a laptop. You plug it in, scan the car, read the codes, clear the codes etc. Due to the nature of running it on the laptop it is not practical to do this on the fly.

Any decent generic code reader will clear the cat code, but not automatically. You will have to read the code and clear it.

I do this with the scanguage. Get the code, read it and clear it. Takes around 1 minute. The only problem with my N18 is it will not clear it with the engine running, I need to turn it off, then turn to ignition on with engine not running to clear it. On my N14 I can clear it with the engine running, so can clear the code in 10 seconds whilst driving.

 

Thanks! It's running great! Can't wait to test out trans this weekend at ShiftSector.

 

Yes it inherently lowers EGT more than gasoline does.

 

Those running a JCW n18 , how much more seat of the pants pull did you get using the JB+ over stock.


Thanks.


This thread is so jacked full of information going in all different directions.


Should have about 10 separate threads.

 

You should be about 20psi, more mods less boost. The difference is more than any other mod you could do. JB+ is a must

Sent from my iPhone Office

 

Thanks Mario!


I was more asking about a noticeable power increase over stock. Very noticeable, or somewhat.


Otherwise the JCW car, my car ,,, would be all stock.

 

It's noticeable and if you improve the octane of fuel, above 91, you can feel it even more. Tune and downpipe make up for about 90% of power gains.

Sent from my iPhone Office

 

I am by no means at the level of know-how as Terry, but I second this ^^^

From all I've read, the O2 sensor is just that: it only reads the Oxygen content of the exhaust. Its signal (lambda) is sent to the ECM for adjustment of the ratio based on the sensor's reading. Thus the fuel content is moot* (in this closed loop system). That is what's such an awesome (IMO) thing about E85 blending. It's pluses all around!!

*well, the 'limit' on blending is the fuel trim 'hardcoded' into the DME

 

I agree. I wasn't doing a good job at explaining my thoughts.

 

It's all good, the forum can be a great sounding board; mix that ethanol up!!
After a couple weeks of downtime I am ready to resume the mixing plan :-)
(Will post findings in the other thread).

 

Also, step on the brake pedal...

 

Does this jb + shorten the life of engine !turbo etc in any way. I mean running stock with it set at stock setting.

 

Probably. But no more than opting for the dealer JCW tune which still keeps the factory warranty. Which is the maximum life you can expect from the engine without problems.

 

Anyone noting high idle, mine is around 1,200k when warm. I have no idea if its the e85/93 blend i am using or the JB+? Also how bad would it be to run leaded fuel in the mini. I have a choice of running Sunoco standard (110oct) or i can get unleaded 260gt (100oct). Might give that 260 gt a try a few times, running e85 after sometime can clogged fuel injectors and rust in the tank fyi.

 

Lead will kill your cats and oxygen sensors.

 

My idle is ~700 rpm.