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Old 08-21-2003, 04:28 PM   #97
Scooby Newbie
Member#: 40416
Join Date: Jul 2003
Location: CA
68 Porsche VW Bus

Default LM1 Sensor Location

Hi Y'all,

Thank's all the people on this thread for all the interrest in the LM-1.

Before all of you in the group buy will ask, the most asked question (which has not made it onto our web-site yet) is:

Where should I mount the sensor?


Depends on your application.

The coolest spot is the best. Experience so far has shown that right before the cat is typically the coolest. The sensor should be mounted at a 9-10 o'clock or 2-3 o'clock position. The Bosch wideband is sensitive to its housing temperature. Specially Turbo applications with wide pipes retain a lot of heat in the exhaust system. This is because wide pipes have a high volume to surface ratio which slows down the cooling of the exhaust gases by the pipe surface. The same is true for coated exhaust systems. This makes the sensor housing hotter through heat conduction by the bung. By mounting the sensor at an angle under the car allows the under-car airstream to cool the sensor housing. Of course for those with extremely hot exhaust systems (like blown or turbo'ed rotaries) a possible remedy is an exhaust bypass pipe of 3/4" or 1" diameter in which the sensor is mounted.

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