NTK L2H2 New Linearisation

Pin outs, sensor calibrations etc
RICE RACING
Posts: 448
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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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RICE RACING
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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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RICE RACING
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Re: NTK L2H2 New Linearisation

Post by RICE RACING »

For anyone interested.

After a crash course on Hygrometers and buying three different 'good quality' analogue donkey pubic hair versions and conducting days worth of tests it finally became apparent just like everything you need to only use a calibrated and certified reference instrument to get a guaranteed RH value.

The TESTO 608-H2 version is just that, relatively inexpensive for what it is, and you have a proper version which ironically if you do the wet bulb dry bulb math rather than using a look up chart and use some fine type k thermocouples is in close agreement as I always say it is good if you have a secondary measure always to act as a sanity check !


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wet bulb 2.jpeg
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RICE RACING
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Re: NTK L2H2 New Linearisation

Post by RICE RACING »

Ok, we keep stock of these 'custom NTK' sensor in boxes of 10 as below. These are a plug & play using the stock connector for any Syvecs kit. It takes a couple of days to turn around for those interested.
Every sensor is logged and validated. Pertinent info kept on file is date calibrated and conditions when it was done
  • Baro pressure
    Temperature
  • Relative humidity
    % O2 in air
  • Accuracy to laboratory grade NTK
These will be available in stock to dealers and end users alike, you can contact a Syvecs Dearler or myself for pricing.
Once you have the sensor, email the serial number on the unit to obtain the linearization file to upload to your sensor database.
LZA09-E1 stock.jpeg
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LZA variatons fixed.jpeg
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RR cal.jpeg
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Last edited by RICE RACING on Wed Mar 23, 2022 4:19 am, edited 1 time in total.
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stevieturbo
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Re: NTK L2H2 New Linearisation

Post by stevieturbo »

So this is why there's a shortage of sensors...you've been buying them all ? lol
RICE RACING
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Re: NTK L2H2 New Linearisation

Post by RICE RACING »

stevieturbo wrote: Sat Mar 19, 2022 7:40 pm So this is why there's a shortage of sensors...you've been buying them all ? lol
No shortage here :)
Every sensor recorded with matching cal file as per below.
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RICE RACING
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Re: NTK L2H2 New Linearisation

Post by RICE RACING »

I have started running a case sample here with a dealer this weekend.
We will document the specific critical importance of working with known materials and parameters in hardware and input variables (test grade meter, lab NTK, site condition atmospheric references).
  • Serial number of dyno test meter
  • new sensor type
  • O2% calculation reference
Compared to how the RR 'NTK lab grade equivalent' https://www.riceracing.com.au/Products.htm performs, set on a different serial number reference unit, in different location at different O2% calibration conditions.

These are being run up in a test car mounted in the same location after turbocharger within a couple of cm of each other just clocked around so they fit.
Hopefully will be of benefit to others trying to do the same or if on other hand you want an independent review (not sponsored!) of how these perform and the ease of which you too can have a validated plug n play option to run on your or customers cars.
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RICE RACING
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Re: NTK L2H2 New Linearisation

Post by RICE RACING »

Here is a quick preliminary test, this was done by the NSW Australia Syvecs dealer.

This roller type dyno and slip means there is an offset of about ~250rpm as per attachment note.
Next few weeks will follow up with another RR calibrated sensor on second car and will up the data recording rates and set scales for easier comparison but this one he was happy with "they read the same" we will also try at a richer mixture setting just cause.

If anyone wants independent review you can contact them here > https://www.rpmotorsports.com.au/
  • Autronic B MAFM1 S/N B4823
    NTK - LZA11-V2 *NEW*

    Syvecs S7PLUS S/N 19626
    NTK- LZA09-E1 RR19322A
Local conditions and O2%
Nath RPC Autronic cal.jpeg
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RR19322A sensor test run.jpg
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7000rpm is 7250rpm Autronic B LZA11-V2 NEW.jpeg
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RICE RACING
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Re: NTK L2H2 New Linearisation

Post by RICE RACING »

Also, we have the 'true' lab grade' quality NTK's available to supply.
These come with a generic connector which end users can change out to suit their own fitment.
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RICE RACING
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Re: NTK L2H2 New Linearisation

Post by RICE RACING »

Here is some pics of various types I have been doing over the decades !
You will see the 'LR motorsport grade' NTK, these were available to me long before that company existed through NEKO in Japan, these would come to us with an individual eprom chip which would need to be fitted into the NEK0-AF700 meters we supplied and used. Still very popular in Japan.

Pics of one sent to me which I calibrated as well as the 'lab grade' NTK's which I supply that are commonly used here is proper meters (not motec!@).
Leb grade NTK.jpg
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LR motorsport NTK v ghetto.jpg
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LR motorsport NTK.jpg
LR motorsport NTK.jpg (155.83 KiB) Viewed 20741 times
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