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Old 01-02-2003, 04:58 PM   #10
Jon [in CT]
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Quote:
Originally posted by 2000vfr800
Hmmm...very interesting...

I just posted a thread where I am going to get an ETAS Lambda Meter LA4 from work and do some datalogging with it. I might be able to get a second one and place one before the turbo, and one after and see how much they differ.
Wow ... must be nice to have access to an ETAS LA4. I see they were "on sale" last month for only $3999.95 (see http://www.etasinc.com/html/la4promo...promo_main.htm).

Ideally, your test would have one sensor mounted in the uppipe and the other mounted in the downpipe. If what I have reported is correct, then when you're under boost and the A/F ratio is significantly richer than stoichiometric, the uppipe sensor will mistakenly report a richer A/F ratio than the downpipe sensor and as the A/F ratio moves farther from stoichiometric, the discrepancy becomes larger. At stoichiometric, you should notice very little difference.

Please do report your results.
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