Where do you take your AFR reading from?
07-12-2010, 09:12 AM
#2
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Pre cat, but that's hard to do if you're doing it on a stock exhaust vehicle. It should be about 12-18" downstream from the head, or after turbo.
07-12-2010, 01:37 PM
#4
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I think it depends on the sensitivity of the wideband meter your using. Most consumer wideband systems are 5 wire and are very sensitive to fluctuations caused by a cat so you would want them pre cat. A 7 wire sensor is more accurate and isn't as affected by a cat converter so it can be place post cat.