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Discussion Starter · #1 ·
Can you get an accurate indication of rich/lean when the plugs are cold or do you need to 'read' them when they are hot? Thanks.

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Jim Anson, 87 GN with: TA-49; 50# injectors; 62mm Hemco; 3" DP; Walbro 340; CAS V-4; and SMC alcohol system. Stock long block, transmission, and converter. Best run of [email protected] with JL 110 chip, 110 octane and 23# boost.
 

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Surely you jest
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If it's too lean, it'll be "blistered" (looks like it's been sandblasted in spots to me). Heavy carbon build-up means it's rich (small amounts are normal). Both of these symptoms will be present (if they exsist) while the plug is hot or cool. HTH.

[This message has been edited by *JOKER* (edited July 20, 2001).]
 

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General Useless POS
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You need to make a pass and shut it down. Pull the plugs and see. Driving the return road will change the look of the plugs and give a different reading. This is not really recomended in a turbo car since the turbo is most lkely still whizzing over 100K RPM. You dont wanna shut off its oil supply at that speed intentionally.
 

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Discussion Starter · #4 ·
Thanks.

------------------

Jim Anson, 87 GN with: TA-49; 50# injectors; 62mm Hemco; 3" DP; Walbro 340; CAS V-4; and SMC alcohol system. Stock long block, transmission, and converter. Best run of [email protected] with JL 110 chip, 110 octane and 23# boost.
 
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