Iowa99GST
10+ Year Contributor
- 142
- 1
- Apr 29, 2010
-
Des Moines,
Iowa
What's the difference? Pros & Cons?
Thanks guys.
Thanks guys.
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The cheap NB gauges are actually really useful for monitoring almost any modified DC voltage... as long as it's not a NB signal.
Ya, a narrowband gauge is just a 2x 3914/3915 bar-graph circuits stacked. It would be more useful as a voltage gauge. Just swap out a few resistors for different values and you'd have a pretty cool bar-graphed voltage gauge.

Its very possible to tune with a narrowband. It reads in volts instead of afr's. Which you can easily find a conversion ap for or just find a target volt reading to aim for. The same way you would aim for a specific afr. If your logging to get the volt readings that is.
Its very possible to tune with a narrowband. It reads in volts instead of afr's. Which you can easily find a conversion ap for or just find a target volt reading to aim for. The same way you would aim for a specific afr. If your logging to get the volt readings that is. Ive never heard anything good about the NB gauges though.

Oh yeah?
The rich region output of narrow band O2 sensors is temperature dependant, which renders it useless if an accuracy better than 1.5:1 AFR is desired. This is immediately obvious given the fact that a single output voltage actually represents wildly different air fuel ratios depending on the unregulated and unmeasured sensor temperature. These sensors were designed for operating closed loop around stoichiometry (14.64:1 for
gasoline), and for performance tuning they are useless...
/THREAD
You must have reinvented the NB sensor and developed new theory then.
Please teach us.
EDIT:
Damn... beaten again. I gotta start typing faster.
AND???Safc guys did it for years and years. I know of some evo guys that have ran mid 11's with safc and nb o2. Not that there isnt better options more easily obtainable now but still...
Heres a pic ive had laying around for a while.
AND???
This is not a debate on being cheap or not... How many people use a SAFC still? (Rhetorical question, please don't answer)
Overlay what I posted and maybe you'll begin to understand what was said an why it doesn't work
And?? it works...
If you have a logger
This is the most important tool you can have. Make sure to note knock, timing and airflow when logging. These values are very key when it comes to tuning and diagnosing your car.
DO NOT: Count on just an O2 gauge for tuning. Yes, it can tell you when you are running incredibly lean or rich, but knock and timing are more important to look at...
I'm not going to debate this any further...
Your more then welcome to "tune" your car that way...
But I myself will give you a little advice "I've had laying around for a while" from those SAFC days
Yea theres no need to debate, ive ran a 12.5 on a ebay 16g and safc. Moved on since then but most people's advice is regurgitated shit they heard from somewhere else. and that quote is good advice.
These cars are very capable with stock parts and basic mods.
Back "in the day" people who were making power with NB tuning and EGT sensors were thinking outside the box and pushing the limits. We're in a different day and age now. Implying that tuning with a NB is in any way a good thing is just bad advice.
A logger is a logger...and MMCD will still work as long as the ECU isn't locked in ECMlink communication mode.
Don't think everyone drives everywhere with their laptop... .
A logger is a logger...
