AEM wideband gauge 30-4110 installation | AEM
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Last seen: 2 years 3 months ago
Joined: 03/15/2018 - 18:18
AEM wideband gauge 30-4110 installation
I purchased an AEM Uego 30-4110 wideband O2 gauge and intend to install it in a 2000 Porsche Boxster S. The installation instructions say to mount it at least 18” from an exhaust port and before catalytic converters. On this model of Porsche it has a “warmup cat” that is located at the headers. See photo below. It is so close to the engine that it is not possible to mount the sensor 18” from the exhaust ports. The other alternative is to mount it after the warmup cat (and before the second set of catalytic converters). What do you suggest? How much will the afr readings be affected by mounting it after the warmup catalytic converter? Does it matter whether it is mounted on the left vs right header?
Last seen: 13 hours 33 min ago
Joined: 06/06/2014 - 09:31
Unfortunately you're dealing

Unfortunately you're dealing with one of the worst case scenarios for mounting and using a wideband O2 sensor. Regardless of which way you choose to go, you're going to have some trade off to accept. If going ahead of the cat, you risk shortening the sensor life due to higher temp exposure being closer to the exhaust ports. If after the cat, you risk having skewed AFR readings. We have no way of knowing how different the readings will be pre or post-cat. The only way to know for sure would be to put a sensor in each location to see the delta. Ultimately AEM has no suggestion one way or the other as neither are ideal and both have trade offs. You're aware of each trade off now - the decision is up to you. Sorry we can't be more help.