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Author
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Topic: reading plugs
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capri man
Gearhead Posts: 7611
From: doerun, ga.
Registered: Nov 2000
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posted 01-24-2002 08:47 PM
   
before i did some port work and went down to a .019 head gasket on my 306 my car was running very rich. now after about 15 runs the porcilin on the new plugs is still lilly white with only a very very small tinge of brown. the electrode is still shiney copper colored. there is a little black smut on the threads of the plugs. alex didnt you post one time about reading the threads on the plugs? am it to lean? do i need to richen up a # or two? 700 d/p with proform carb body. thanks------------------
mike r
racing is real
everything else is just a game.
81 capri-7.56 @88mph 1/8
1.56 60 ft.
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capri man
Gearhead Posts: 7611
From: doerun, ga.
Registered: Nov 2000
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posted 01-25-2002 10:22 AM
HHHHHEEEEELLLLPPPP!!!!!!!!!!!------------------
mike r
racing is real
everything else is just a game.
81 capri-7.56 @88mph 1/8
1.56 60 ft.
IP: Logged |
Just Strokin
Gearhead Posts: 754
From: Tuscaloosa, Alabama
Registered: Dec 2001
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posted 01-25-2002 02:19 PM
were these plug readings taken with a clean shut off? no idling?Sounds like you are pretty close. What heat range of plugs are you running? I might conside going up one number on the back side and leave the front alone.
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capri man
Gearhead Posts: 7611
From: doerun, ga.
Registered: Nov 2000
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posted 01-25-2002 03:31 PM
no they were taken after a run and idle back to trailer.
they are autolite 764 (gt40-p heads)
thanks, mike------------------
mike r
racing is real
everything else is just a game.
81 capri-7.56 @88mph 1/8
1.56 60 ft.
IP: Logged |
Moneymaker
Administrator Posts: 27499
From: Lyons, IL, USA
Registered: May 99
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posted 01-25-2002 10:05 PM
More compression = more heat. More heat = more fuel required Mike. I read the plugs at the threads. You should have heat in the first two to two and 1/2 threads from the electrode. They should be a sooty gray color.  ------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
US Class Nationals link
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capri man
Gearhead Posts: 7611
From: doerun, ga.
Registered: Nov 2000
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posted 01-25-2002 10:22 PM
thanks alex, mine is sorta sooty black!------------------
mike r
racing is real
everything else is just a game.
81 capri-7.56 @88mph 1/8
1.56 60 ft.
IP: Logged |
84stang
Journeyman Posts: 9
From: Alpharetta, GA
Registered: Jan 2002
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posted 01-26-2002 01:10 AM
quote:
Originally posted by Moneymaker:
They should be a sooty gray color.
What does it mean if they're brown?
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Moneymaker
Administrator Posts: 27499
From: Lyons, IL, USA
Registered: May 99
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posted 01-26-2002 01:35 AM
The threads???? They will only be brown from some funky fuel additives or water (rust). ------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
US Class Nationals link
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Just Strokin
Gearhead Posts: 754
From: Tuscaloosa, Alabama
Registered: Dec 2001
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posted 01-26-2002 07:29 PM
Really to get a good plug reading, you should shut the engine off after the run and pull the lugs with no idling.....you may need to go up a couple more jets after you read them with no idling.how cold is that plug? or is it basically the stock plug for those heads?
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Moneymaker
Administrator Posts: 27499
From: Lyons, IL, USA
Registered: May 99
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posted 01-26-2002 08:05 PM
A clean shut off from WOT reading is ALWAYS the best and most accurate. ------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
US Class Nationals link
IP: Logged |
capri man
Gearhead Posts: 7611
From: doerun, ga.
Registered: Nov 2000
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posted 01-27-2002 11:13 AM
strokin, it is the stock plug called for w/the p-heads. i just ask for the plug for a 1999 explorer.------------------
mike r
racing is real
everything else is just a game.
81 capri-7.56 @88mph 1/8
1.56 60 ft.
IP: Logged |
Moneymaker
Administrator Posts: 27499
From: Lyons, IL, USA
Registered: May 99
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posted 01-27-2002 01:33 PM
GO down one heat range Mike. ------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
US Class Nationals link
IP: Logged |
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