Pre or Post Turbo?

7.3n/anut

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I know its been on here but im puttin a pyrometer in my 1992 F-250 and i cant remember if i need a pre or post-turbo thermo couple since its an IDI.
 

MIDNIGHT RIDER

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PRE-TURBO is a much better reading than post-turbo.

A post-turbo reading is only a guess at best of actual combustion-chamber temperatures.
 
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