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Author Topic:   Spark Plug Gap
65_302
Gearhead

Posts: 239
From: Bixby, OK
Registered: Jul 2001

posted 11-19-2002 11:31 PM     Click Here to See the Profile for 65_302   Click Here to Email 65_302     Edit/Delete Message   Reply w/Quote
I know its been discussed before, but I did a search and could not find what I am looking for.

I need to know where I can go to find the stock spark plug setting for the GT40 aluminum heads, 9:1 compression. Its an XB3 crate motor and the plug that came with it are Autolite 104s. I have messed with them so much recently, I can't remember the stock setting.

Thanks.

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Moneymaker
Administrator

Posts: 19704
From: Lyons, IL, USA
Registered: May 99

posted 11-19-2002 11:33 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
You can't go wrong with a .035 to .040 gap.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"

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65_289
Gearhead

Posts: 761
From:
Registered: Jul 2001

posted 11-20-2002 01:35 PM     Click Here to See the Profile for 65_289   Click Here to Email 65_289     Edit/Delete Message   Reply w/Quote
How much should the gap be increased with a Holley 800-200 Strip Annihilator and a Pertronix coil?

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Moneymaker
Administrator

Posts: 19704
From: Lyons, IL, USA
Registered: May 99

posted 11-20-2002 02:41 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
I would never gap a spark plug for a high performance application more than .040. This advice was given to me by our good friend and sponsor Don Ward, head performance engineer at Autolite.

------------------
Alex Denysenko
Co-Administrator and Moderator

NHRA/IHRA/SRA member and licensed Superstock driver
MCA member# 53321
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Professional Manwhore
The Barry of BarrysGrrl

Quote #1: "I never met a magazine mechanic I liked."
Quote #2: "Make sure brain is in gear before engaging mouth!"
Quote #3: "If you can't run with the big dogs, stay on the porch!"

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