Which Spark Plug??

mustangman94

New Member

Mar 5, 2004

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0

Feb 22, 2007

#1

• Feb 22, 2007

• #1

I have a 94 GT and all I have upgraded electically wise is a MSD Coil. I need new plugs and I'm gunna use copper Autolite's, but I looked on here and everyone says to use 24's. But on the Autolite website here's what it says:

V8-5.0L F/inj. HO (D)
Copper Core 764

V8-5.0L F/inj. HO (T)
Copper Core 25

So it's between 764, 25, and 24. SOOO which one is it actaully??

Thanks!

 

gunfish

Member

Jul 20, 2005

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huntington beach, ca.

Feb 22, 2007

#2

• Feb 22, 2007

• #2

A lot of people use Autolite 24's because they are a colder plug than the factory 25's. Our engines have a tendency to ping with the stock tune, a colder plug helps to eliminate this.

 

mustangman94

New Member

Mar 5, 2004

34

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0

Feb 22, 2007

#3

• Feb 22, 2007

• #3

Ok that helps, thanks!

What is the 764 plug then? A hotter plug?

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

31,179

33

129

Feb 22, 2007

#4

• Feb 22, 2007

• #4

764 is for the Cobras.



I also run 24's on GT heads.

Good luck.