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09-18-2003, 02:26 AM
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CC Member
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Join Date: Jan 2001
Location: upminster, essex, uk,
uk
Cobra Make, Engine:
Posts: 241
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Not Ranked
Spark plug choice
I'm in the process of building a 331 stroket for my Cobra.
It has a compression ratio of 9:1 (for when I can afford a supercharger !) and world windsor SR heads in Aluminium.
I have an MSA 6AL ignition Edelbrock inlet manifold and performer plus cam and a 600cfm Holley.
What plugs should I be using?
Will it change when I put on a supercharger?
Thanks guys
Simon
__________________
At over $6 per gallon, we must REALLY love our cars in the UK !
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09-18-2003, 06:40 AM
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Senior Club Cobra Member
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Join Date: Dec 2001
Location: Shasta Lake,
CA
Cobra Make, Engine:
Posts: 26,593
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Not Ranked
Simon,
Different people have had good luck with different plugs, but the main concensus is stay away from the platinum ones. I run a Jacobs Pro Street ignition and I have used Champion, Autocraft, and Motorcraft. I have the best luck and the motor puts out more power with the Ford Motorcraft plugs. As for the supercharger, I can't give you any suggestions there. Some of the guy's running them whould be able to help you in that area. You might play with various heat ranges and plug gaps also. I wound up getting the best results with a gap of .049.
Ron
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09-18-2003, 06:52 AM
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CC Member
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Join Date: Dec 2000
Location: Broken Arrow. OK ( South Tulsa), USA,
OK
Cobra Make, Engine: 66 COBRA FE 427 /4SP. (HCS Coupe w/ 408 Stroker and TKO 600 -sold)
Posts: 5,595
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Not Ranked
Plugs
George Anderson recommended Accel #416 plugs for my FE and I have been completly satisfied. I like them better than Champions or Autolight. I haven't tried Motorcraft yet.
Clois
__________________
Sunshine, Asphalt and no stop signs...Perfect
"Let's roll"
"Be part of Something Good
......Leave Something Good Behind!"
from CD "Long Road Out of Eden"
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09-18-2003, 07:29 AM
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CC Member
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Join Date: Feb 2003
Location: Billericay, England.,
Posts: 18
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Not Ranked
What plugs should you be using?
Ear Plugs 
GUMBALL UK
P.S. See you Sunday |
09-18-2003, 08:16 AM
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Senior Club Cobra Member
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Join Date: Oct 1999
Location: Menomonie, Wisconsin,
Posts: 3,505
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Not Ranked
Anything but Champions.
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09-18-2003, 08:54 AM
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Senior Club Cobra Member
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Join Date: Aug 2001
Location: Rocky River, Ohio,
OH
Cobra Make, Engine: Everett-Morrison, 347 Tri-power Stroker
Posts: 678
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Not Ranked
Just went down this same path a couple of weeks ago when I did the last tuneup; after posting a forum here and talking to my engine builder and others, I ended up with Autolites.
I was running Champions, with no real problems... just thought that I might upgrade to one of the platinum-style plugs. I was steered back to a standard plug.
I also run the MSD 6AL box, but run the plug gaps smaller than the MSD manual calls for. I get a pretty good idle and crisp response on the highway at 0.045" gap... any larger and it seems to stumble a bit at speed.
My compression is about 10:1
- Dan
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09-18-2003, 09:28 AM
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CC Member
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Join Date: Dec 2000
Location: Broken Arrow. OK ( South Tulsa), USA,
OK
Cobra Make, Engine: 66 COBRA FE 427 /4SP. (HCS Coupe w/ 408 Stroker and TKO 600 -sold)
Posts: 5,595
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Not Ranked
Dan I am running the same gap as you and that seems to work well with my engine and MSD 6AL.
Clois
__________________
Sunshine, Asphalt and no stop signs...Perfect
"Let's roll"
"Be part of Something Good
......Leave Something Good Behind!"
from CD "Long Road Out of Eden"
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09-18-2003, 12:28 PM
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CC Member
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Join Date: Nov 2002
Location: Mt. Pleasant, MI,
MI
Cobra Make, Engine: None Yet
Posts: 187
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Not Ranked
Why not platinum? I thought they were the best.
auto10x
Bill
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09-18-2003, 07:34 PM
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CC Member
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Join Date: May 2001
Location: The Heart of the Citrus District,
NJ
Cobra Make, Engine: Sold 3047 & 3002 in 2012
Posts: 2,763
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Not Ranked
Plugs
My engine builder only allows NGK, period.
Don't know why..Don't care...I just use them and they work great
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