Spark Plugs

BitingSnake

New Member

Sep 11, 2007

6

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Marengo, OH

Sep 24, 2007

#1

• Sep 24, 2007

• #1

This may be a dumb question but what is the reach of a spark plug? I dont know if this is another word for gap or what. Im trying to order some plugs from summit and and it has a couple different reaches for my car. There is .460 in. reach, .708 in. reach, and .807 in. reach. Any help is greatly appreciated. Thanks.

 

go-stang5.0

New Member

Jan 27, 2003

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Glenview,Il

Sep 24, 2007

#2

• Sep 24, 2007

• #2

The reach is how far the electrode sticks into the combustion chamber when properly screwed in. Too much reach is BAD! as the plug will interfere with valve/piston movements. Too little reach and you may have incomplete/improper combustion. That said...I have no idea what the proper reach is. Good luck.

 

blksn955.o

Founding Member

Mar 15, 2002

3,263

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st.louis mo 314

Sep 24, 2007

#3

• Sep 24, 2007

• #3

A 1994 cobra with stock gt40 heads will use a NGK TR5 for a stock plug. One range colder is a TR6 and for 2 colder you need the irrid. plug that is like a TR7i or TRi7...or something.

Cross ref. that plug with other brands and you should be golden.

IMHO I would go with either a autolite or NGK plug.

 

BitingSnake

New Member

Sep 11, 2007

6

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0

Marengo, OH

Sep 24, 2007

#4

• Sep 24, 2007

• #4

Thanks for the help guys. Much appreciated.