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jpnovak jpnovak is online now
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Join Date: Apr 2000
Location: Austin, TX
Posts: 7,474
Marty, Excellent discussion starting here.

The 3.2 motors have a CHT located on the forward side of #3. It mounts under the section of engine tin. Sal (Scarceller) has logged a lot of data from the 3.2 Motronic. He said that 320F is the peak under a high, hill-climbing load. I do not know what AFR the car was running to get them to this temp.

Wide Band O2 + data logger for 84-89 Carrera

I tried mounting a RTD on the fins of my heads. The problem was that the cooling fan would move so much air that I never read over 130F. Mine was located in the corner of #1 right behind the block-off plate. I wish I had had my heads drilled for a CHT insert.

I have the ability to log CHT with the EFI system. My psuedo-CHT measurement is only used as a warm-up indicator. I am more than willing to experiment if someone can suggest a better mounting location.
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Old 08-03-2009, 11:53 AM
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