Part Number for plugs to use on GT40 irons?

Mustang Yawie

Founding Member

Jul 21, 2002

281

14

28

Rialto CA

Apr 23, 2006

#1

• Apr 23, 2006

• #1

Can anyone tell what part number to use on iron GT40 heads? installing a vortech soon and want to know what number to use for colder plugs? thanks

 

Mustang5L5

That is…until I whipped out my Bissell

Mod Dude

Feb 18, 2001

43,260

17,945

224

Massachusetts

Apr 23, 2006

#2

• Apr 23, 2006

• #2

Stock plug would be an Autolite 764 or a motorcraft 32C

 

Mustang Yawie

Founding Member

Jul 21, 2002

281

14

28

Rialto CA

Apr 23, 2006

#3

• Apr 23, 2006

• #3

How Do i figure what a colder plug would be? thanks

 

M

Mike92GT

Founding Member

Jan 23, 2002

583

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Florida

Apr 24, 2006

#4

• Apr 24, 2006

• #4

If your using Autolite, a lower number is a colder plug. So if your using a 764 , the next coldest would be 763.

 

millhouse

Founding Member

May 14, 2002

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Simpsonville, SC

Apr 24, 2006

#5

• Apr 24, 2006

• #5

Ahh...again, autolite 103's are 1 step colder than stock and fit gt40/gt40p's

Edit:

Depending on what you reference, 764's seem to be the stock plug for the gt40's. That would make the 103's 1 step colder. Corral has a good plug reference, although they list the 103's as 2 step's colder than stock (765's).

Anyways, here is a link....

http://www.corral.net/forums/showthread.php?t=436174

 

Mustang Yawie

Founding Member

Jul 21, 2002

281

14

28

Rialto CA

Apr 24, 2006

#6

• Apr 24, 2006

• #6

Thanks, ill save that for future reference