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Author Topic:   reading plugs
capri man
Gearhead

Posts: 7611
From: doerun, ga.
Registered: Nov 2000

posted 01-24-2002 08:47 PM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
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

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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

posted 01-25-2002 10:22 AM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
HHHHHEEEEELLLLPPPP!!!!!!!!!!!

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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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Just Strokin
Gearhead

Posts: 754
From: Tuscaloosa, Alabama
Registered: Dec 2001

posted 01-25-2002 02:19 PM     Click Here to See the Profile for Just Strokin   Click Here to Email Just Strokin     Edit/Delete Message   Reply w/Quote
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

posted 01-25-2002 03:31 PM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
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.

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Moneymaker
Administrator

Posts: 27499
From: Lyons, IL, USA
Registered: May 99

posted 01-25-2002 10:05 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
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

posted 01-25-2002 10:22 PM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
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.

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84stang
Journeyman

Posts: 9
From: Alpharetta, GA
Registered: Jan 2002

posted 01-26-2002 01:10 AM     Click Here to See the Profile for 84stang   Click Here to Email 84stang     Edit/Delete Message   Reply w/Quote
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

posted 01-26-2002 01:35 AM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
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

posted 01-26-2002 07:29 PM     Click Here to See the Profile for Just Strokin   Click Here to Email Just Strokin     Edit/Delete Message   Reply w/Quote
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

posted 01-26-2002 08:05 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
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

posted 01-27-2002 11:13 AM     Click Here to See the Profile for capri man   Click Here to Email capri man     Edit/Delete Message   Reply w/Quote
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

posted 01-27-2002 01:33 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
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

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