NTK L2H2 New Linearisation

Pin outs, sensor calibrations etc
RICE RACING
Posts: 357
Joined: Mon Feb 24, 2014 1:08 am

Re: NTK L2H2 New Linearisation

Post by RICE RACING »

I did get asked: "How close is the Syvecs supplied LZA-09 curve"
  • From lambda 1.000 to 0.800 it is within 1%
    The closer you get to 0.700 its out by over 7% or so on average
    For lean running ~1.200 its about 4%
Basics:
If you are using a dyno tail pipe probe to calibrate your sensor you need to think about pressure effects in the exhaust (I have a video on this that shows in detail more), is the exhaust system perfectly sealed *no air leaks*? if you are in a Nazi type gas chamber set up the lack of pure air around the sensor which the reference cell uses is something allot of people neglect to factor in. When was the last time your dyno person calibrated/refreshed their sensor? how old is it?, is the reference meter able or the user/operator able to program in the daily difference in %O2 in the air (it changes by the day and has large effects). There is a stack of things to consider before blindly following what the 'dyno operator' says as gospel. Again these differences are only of greater importance the further you deviate away from stoich, anything richer than 0.800L and you really want to be knowing what you are actually measuring.
Hope this helps a bit.
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Water Injection Specialist
RICE RACING
Posts: 357
Joined: Mon Feb 24, 2014 1:08 am

Re: NTK L2H2 New Linearisation

Post by RICE RACING »

So I put the previous listed formula into the S8 as a custom gauge so it shows live the % of O2 in the air during calibration.
Just waiting on the hygrometer as a secondary check to doing the 'laborious' wet bulb dry bulb relative humidity calculation, so once the new meter is calibrated it will be faster to input in the values and punch out new sensors with all parameters double in some cases triple verified. For the BAP I use a KA sensor of suitable range and before anyone asks yes I have tested this from sea level to 1850m altitude in the same day :lol:
The on board 'egt' channels in the ECU after 3 minutes warm up time are calibrated with the OMEGA simulator to be spot on from 0 deg C to 1200deg C, bit? anal but you have to be.
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http://www.riceracing.com.au
https://www.youtube.com/riceracingdonmega
Real turbo road cars fast > reliable > durable
Water Injection Specialist
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