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Old 11-10-2008, 06:12 PM   #5
Scooby Specialist
Member#: 156973
Join Date: Aug 2007
Chapter/Region: International
Location: Adelaide, Australia
2002 ADM WRX STi
STi Black/Blue


Most tuners (and dynos) put a removeable WB02 sensor in the tail-pipe during tuning/logging/dyno. I have compared my LC-1 directly behind my turbo to a WB02 in the tail-pipe and there was almost no difference in actual AFR - however, there was a definate difference in response.

At a constant throttle, AFR is almost exactly the same, a quick stab of the throttle will show the difference in response - and the WB02 in the tail pipe felt about half a second behind.

Saying that, many reputable tuners have and still do tune with the WB02 in the tail-pipe, so it can't be as bad as it is perceived to be - can it?
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