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Old 01-02-2003, 02:03 PM   #1
2000vfr800
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Default SE Michigan Tuners (or others who want to come to SE MI)

Some weekend in the near future, I am going to borrow the ETAS LA4 air/fuel meter from work to check the air/fuel ratio of my tune. This has a sensor which needs to be threaded into your exhaust.

If you have a place for this sensor (for example, Vishnu Uppipes have an extra bung for this purpose), and want to measure your a/f, let me know.

Maybe we could have a tuning meet??
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Old 01-02-2003, 02:08 PM   #2
desiwrx02
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Id love to! I am running on the stock ECU and am really curious as to what shape thats running in. Basically its a DeltaDash type of deal for A/F? If anyone has Deltadash, the could bring that too. Im wondering if my EGT tap in the DP just after the turbo would work well enough...
Ajay
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Old 01-02-2003, 02:25 PM   #3
2000vfr800
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It has a analog output from 0-10V DC which could be used by Delta Dash if the external sensor module is used. It also has a display. It can measure Lambda, a/f, and O2.

I might get Delta Dash and the external module before then (if some things work out), so we might be really set...
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Old 01-02-2003, 04:27 PM   #4
D_REX
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The up pipe is not a good place to measure WOT AFR. When you are in boost it is pressurized, unless your O2 compensates for this pressure the reading will be off. Try to measure just after the turbo.
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Old 01-02-2003, 05:03 PM   #5
2000vfr800
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Thanks for the heads-up. I am going to try and get a second one and take measurements before and after the turbo to see if there are any differences. Should be interesting...
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Old 01-02-2003, 10:50 PM   #6
DocDetroit
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I'm in too!

Which O2 sensor does it use? I know the NGK sensor uses a bung you can get from Pegasus racing (P/N 3883). I'm not sure if the Bosch sensor is the same size or not.
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Old 01-03-2003, 08:07 AM   #7
SonicWRX
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Quote:
Originally posted by 2000vfr800
Thanks for the heads-up. I am going to try and get a second one and take measurements before and after the turbo to see if there are any differences. Should be interesting...
Be careful with the wideband sensor in the uppipe. Most of those 5-wire sensors don't like a pressurized environment and it can cause their premature failure.

I will let Jon expound ...

Mitch
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Old 01-03-2003, 01:30 PM   #8
2000vfr800
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Yes...if you check out the bottom of that thread, you will see that I am going to try and conduct an experiment to see if this is true.
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Old 01-03-2003, 01:36 PM   #9
D_REX
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Quote:
Originally posted by 2000vfr800
Yes...if you check out the bottom of that thread, you will see that I am going to try and conduct an experiment to see if this is true.
it's something I've read on several forums, although it may all come from the same source. When you do your experiment please record and report the brand and model of all equipment, especially the sensors themselves and the controller. I have read reports indicating the pressure dependancies are greater on some sensors than others.

Thanks,
Dustin
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Old 01-03-2003, 01:56 PM   #10
2000vfr800
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I am going to log everything about the tests.

The thing that bothers me the most about Jon's thread is that the guy making the claim also sells a system of his own.

Now, I have no reason to doubt him, or his research since I have not looked into it. But, it will be fun to do the test. I am also going to run this theory by some guys here who have 20 years of engine (mostly diesel...with big turbos) testing experience to see if they have heard of this.

Don
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