X-Mozilla-Keys:                                                                                 
Ed Anderson wrote:

 Paul, if you draw a line from the center of the lead spark plug thru the
trailing spark plug to the side of the housing, the set screw is approx 1"
beyond the trailing plug.  Possibly could be a thermocouple hole, just had
not seen on on NA rotor housing.  In fact, after looking at the 87 - 91
workshop manuals they all show the knock sensor on the center housing, given
more weight to your suggestion.  Is this something the racers install to
keep tabs of housing temps or standard on turbo housings??

Ed

I can understand the line from the center of the lead spark plug to
the cneter of the trailing spark plug. Does the line then turn 90
degrees to get to the side of the housing?
 
I have about six rotor housings around from different years. I will
take a look when I go up to the hangar tommorrow.

Its a mystery.

Paul Lamar
 
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