That was an interesting read, but I believe it is pretty outdated (Nov 2002). Widebands have come a long way since then.

 

Yeah, I notice that too....I'd blame it on google for not giving me more up-to-date related material on that ~

 

Are you using the LM-1 o2 or oem?

 

I have seen something very similar with a few RSXs that we have had at the shop. The A/F in kpro is reading mid 13s at WOT in boost. Richen it up so kpro is reading around 11.5 or so and watch the black smoke come out of the tail pipe (the car is running stupid rich).

Realize that the sensor in the car is not reading properly, stick the dyno LC-1 in the same location that the stock sensor was in the exhaust, and get a reading of 9.5-10.0 a/f in boost. With 0 changes to the calibration file.

Moral of the story is don't rely on stock widebands when tuning WOT. I never ever rely on a stock wideband sensor when tuning a car for the reason mentioned above.

And before anyone says it, no, not every stock wideband is going to be skewed or bad from the factory. But to eliminate the possibility all together I never tune with them and only use them to target closed loop if they are showing similar readings as the dyno wideband sensor.

I am not saying this is your problem since both of your cars are showing very similar results via flashpro, so to verify just put an aftermarket wideband in one of them (properly calibrated of course) and see what you come up with.

 

I plan to install my LM-1 as soon as possible. I just received a new bung, and need to have it welded into my OEM header.

 

I personally would go PLX if i were to do it again. Gernby, like my friend said through the email, innovate wide-band controllers tend to shorten the life of the o2 sensors, which cost anywhere between $50 and $100 depending on how soon you want to replace it. To each his own though

 

the '06 cruve is not that bad for stock setup - if the numbers are good. it gets down to 13.8 up top and is running right at 14 flat otherwise. i would discount the initial and vtec bumps. i ran my ~205whp tuned at 13.8-14.0 for a 120,000 miles w/ 9k rev limiter and drove it hard daily without problems. yours is pushing it a little - at lease it get down up top. i would like to see at 13.2 - 13.5 if i was tuning it.


post your after tune graph...

 

[QUOTE=thesilverbullet,Dec 22 2009, 07:43 PM] the '06 cruve is not that bad for stock setup

 

What is painfully obvious is that the partial throttle tune is 50 times harder than the full throttle tune. I am able to get an almost perfectly flat AFR at full throttle in just a few minutes (better than +/- 0.1:1 variance even across VTEC). However, I've spent probably 100 hours trying to develop a mathematical model in Excel for calculating the part throttle fueling based on the WOT fueling with absolutely no success. Every time I think I have it figured out, I find another load interval where it is way off. I'm even doing some logrithmic averaging with the stock fuel maps, meaning that the lower the load level, the more the stock map is averaged in.

I know that I could save myself tons of time by having Mike at Elite Tuning tune it, but that would go against every fiber of my being. I don't just want a good tune, I want to know HOW to do a good tune.

BTW, I think the modelling that I'm doing in Excel for part throttle tuning will be a complete failure, but there is a LOT of kick ass stuff that this spreadsheet does with the FlashPro datalogs! I'll share it when I'm done.

 

^Looking forward to seeing your results. If everything goes accordingly my buddy and I should both be getting Flashpros in the new year. I think it will be fun, yet challenging to figure everything out. I will probably still use Elite Tuning to do the final tune, but I would also like to learn how to tune properly. There's a lot more info for the Civic, but they've had their system a lot longer.

One thing I'd like to know though. Is it possible to start Datalogging right away? I.e. Can I rip open the packaging and plug the Flashpro into my stock ECU and press a button to start the logging? Yeah, I can be impatient!