Hentai wrote:so the ngk afx read 11.2X:1 AFR?
EDIT: The manual for the AFX (attached for caching) states that it uses an arbitrary stoich value of 14.57, rendering my calculations above wrong. Hentai pointed this out to me. Correct ones are below:
0.8 - 0.03 = 0.77, 0.77 * 14.57 = 11.2189. 11.656 is the correct reading knowing that the gauge displays a stoich AFR of 14.57. Apologies to Hentai for the above comment, which though vague, was useful, but not the below one. Even if Alan used the wrong value for conversion, the device is still in error by a significant amount, IE: 0.776870281400137 instead of 0.8 or an error of 0.023 Lambda rather than 0.03. It'd be nice to clarify anyway.
Get your copy from here rather than the attachment: http://www.ngksparkplugs.com/pdf/AFX_Tu ... REV_06.pdf
Hentai, read the comment again. Your comment does not make any sense at all. The last one was dubious too. I try not to post in this thread unless I have something to offer as I don't want to dilute what is currently a high signal to noise ratio thread, one of few on any forum. If you could do the same, that'd be great, thanks.Hentai wrote:Considering the AFX is not a NGK made item, and is a ECM CO dervied product I would disagree thereHelmutVonAutobahn wrote:This information was gleaned by scoping factory ECUs. ( and the AFX ). I don't think anyone outside of NGK/NTK knows much more than this.
http://www.ecm-co.com/