Spark plug question/Nitrous

N

nos90gt

New Member

Nov 30, 2003

70

0

0

Central FL

Nov 6, 2005

#1

• Nov 6, 2005

• #1

I have a Spark plug question. I am spraying 150 shot. What plug should I run, and what should the gap be set to? Motor is a GT-40 crate motor/carbed,MSD 6AL with gt-40 iron heads.
Thanks for any help you can give. Thanks, Scott
insane6925@aol.com

 

RacEoHolic330

I like to dress like a pretty girl

15 Year Member

Mar 4, 2003

4,014

1,698

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Allentown, PA

Nov 6, 2005

#2

• Nov 6, 2005

• #2

autolite 3923 at .035

 

N

nos90gt

New Member

Nov 30, 2003

70

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0

Central FL

Nov 6, 2005

#3

• Nov 6, 2005

• #3

Thanks man

 

blksn955.o

Founding Member

Mar 15, 2002

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st.louis mo 314

Nov 6, 2005

#4

• Nov 6, 2005

• #4

I ran the autolight 3923's on my gt40 iron heads...they are not correct they are for an Alum. head. They have a wider area (and some along those models have an alum. gasket that has to mount flush with the head) and will not seat along the plug hole due to the iron heads tapper at the plug hole.

I run a NGK TR6 its one range colder...stock is a TR5 and 2 steps colder is a TRi7 it is only avail. in an irridium(sp? no friggan idea) plug, as notice the "i" in the name. This is the correct plug for the iron gt40 heads.

a good gap is .035 like said above.

 

N

nos90gt

New Member

Nov 30, 2003

70

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0

Central FL

Nov 6, 2005

#5

• Nov 6, 2005

• #5

Right now I am running Ac's-R42LTS at .035

 

S

Scorcher2005

Member

Apr 17, 2004

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South Carolina

Nov 6, 2005

#6

• Nov 6, 2005

• #6

so long as you get a copper plug thats a step or 2 colder than stock you'll be fine. I've actually ran the stock heat plug (Autolite 25s) w/ the stockish gap of .045-.05 w/ my 125 shot and it was fine