340 Owners - What spark plugs are you running?
#2817603
09/05/20 08:36 PM
09/05/20 08:36 PM
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Joined: Apr 2012
Posts: 1,563 Macomb, MI
vinnyd76
OP
pro stock
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OP
pro stock
Joined: Apr 2012
Posts: 1,563
Macomb, MI
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Interested to learn what brand/type spark plugs you are using in your Mopar - specifically 340 owners / engine builders?
Last edited by vinnyd76; 09/05/20 08:42 PM.
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Re: 340 Owners - What spark plugs are you running?
[Re: calrobb2000]
#2817716
09/06/20 09:16 AM
09/06/20 09:16 AM
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Joined: Aug 2006
Posts: 2,525 God's Country Maryland
GODSCOUNTRY340
master
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master
Joined: Aug 2006
Posts: 2,525
God's Country Maryland
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autolite 64
cheep and efective !
Autolite's are the only ones that seem to last in my 340.
I love the smell of Deer guts in the morning, it smells like... VICTORY!
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Re: 340 Owners - What spark plugs are you running?
[Re: jmf340]
#2817741
09/06/20 11:01 AM
09/06/20 11:01 AM
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Joined: Jan 2003
Posts: 3,923 Richmond, Indiana
19swinger70
master
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master
Joined: Jan 2003
Posts: 3,923
Richmond, Indiana
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Autolite. 64 or 65 - cant remember.
1970 340 swinger. sublime 1967 barracuda fastback BB 55 Plymouth Project
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Re: 340 Owners - What spark plugs are you running?
[Re: vinnyd76]
#2817797
09/06/20 12:48 PM
09/06/20 12:48 PM
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Joined: Aug 2003
Posts: 43,230 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,230
Bend,OR USA
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What compression ratio, C.I. and which type heads, stock or aluminum?
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 340 Owners - What spark plugs are you running?
[Re: mopar346]
#2817974
09/06/20 08:28 PM
09/06/20 08:28 PM
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Joined: Apr 2005
Posts: 4,923 new berlin wisconsin
Mr T2U
master
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master
Joined: Apr 2005
Posts: 4,923
new berlin wisconsin
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it has been a while since i had a small block. if i remember correctly i used to run NGK GR4 V power plugs with a MSD 6al ignition system with a blaster coil..
perception is 90% of reality
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Re: 340 Owners - What spark plugs are you running?
[Re: Cab_Burge]
#2817987
09/06/20 09:28 PM
09/06/20 09:28 PM
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Joined: Apr 2012
Posts: 1,563 Macomb, MI
vinnyd76
OP
pro stock
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OP
pro stock
Joined: Apr 2012
Posts: 1,563
Macomb, MI
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Thank you for the feedback!
Last edited by vinnyd76; 09/06/20 09:29 PM.
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Re: 340 Owners - What spark plugs are you running?
[Re: Cab_Burge]
#2817989
09/06/20 09:29 PM
09/06/20 09:29 PM
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Joined: Apr 2012
Posts: 1,563 Macomb, MI
vinnyd76
OP
pro stock
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OP
pro stock
Joined: Apr 2012
Posts: 1,563
Macomb, MI
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What compression ratio, C.I. and which type heads, stock or aluminum? Compression ratio around 10:1, Stock X-Heads
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Re: 340 Owners - What spark plugs are you running?
[Re: vinnyd76]
#2818414
09/08/20 07:27 AM
09/08/20 07:27 AM
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Joined: Jul 2007
Posts: 11,836 Florida
mopar346
Let me tell ya about fat chicks!
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Let me tell ya about fat chicks!
Joined: Jul 2007
Posts: 11,836
Florida
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When I type in 1970 340 Duster into the search criteria for Auto Zone, they recommend Autolite 65s. Is it just a different temp between the 64 vs 65? I tried both when I first put it together and settled on the 64s, I liked the way they burned better. I'm in Florida and have been known to hammer it.
Careful, your character's showing!
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Re: 340 Owners - What spark plugs are you running?
[Re: Mr340]
#2819230
09/10/20 10:29 AM
09/10/20 10:29 AM
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Joined: Jun 2004
Posts: 935 Elizabethtown, KY
6T9Hemi
super stock
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super stock
Joined: Jun 2004
Posts: 935
Elizabethtown, KY
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I was a Champion user but switched to NGK's about 4 or 5 years ago and am very happy with them, one is 340 w/ironheads and the other is 416 w/eddy heads
Gary What number NGK's do you run and is it up or down from the normal heat range.
1969 340 4 Speed Swinger R4, black vinyl, white butt stripe, 3:91
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