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1 Attachment(s)
Setting up AEM wideband
Hey guys I just bought HP tuners and am slightly familiar with it but am confused by wideband settings.
When setting up the wideband, hp tuners has a preloaded table that you can choose but I dont trust its accuracy. I would rather input the information from the instructions that came with the gauge. After all, whats the point of data logging if it doesnt match the gauge..
Here is a link to the instructions for my unit-
http://www.aemelectronics.com/files/...GO%20Gauge.pdf
What im unclear on is that it says that the output is 0-5 volts but on all the charts provided It says 0 Volts=10.0 AFR and 4.25 Volts= 18.5 AFR
None of the charts go up to 5 Volts. Is 5 Volts 20 AFR?
Im using this formula provided by the tuning school to figure out the formula to input manually into hp tuners
http://www.thetuningschool.com/downl...and_offset.xls
Help me out here guys... just want to make sure my wideband matches my gauge dead on.
Attached is the information I entered into the spreadsheet according to instructions for my wideband
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Also what you might check to put your mind at ease. When you have it setup as close as you think it can be, use your phone to take a video with both the screen and the gauge in frame, make sure it cycles up and down a couple times. Go back and pause the video periodically and see the discrepancy, if any...
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Instead of video, set up 2 graphs. One collecting lt+st error and one collecting wb error. In closed loop, the narrow band O2's will keep afr at stoich. Drive a good steady pace log session and look at your wb error results. Should be close to zero. Any delta will be offset and can be used to tweak the wb user defined offset value.
Also beware...if you have changed your tune stoich to anything other than 14.68...say 14.2 for e10, the aem will be reporting 14.7 so you have an immediate .5 offset. That's why you need to be tuning in lambda.....
Ed M
