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Dr.Dakota
Dodge Dakota
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5/28/2002
13:12:28
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 Subject: Idexed Plugs?
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Message:
I just bought my AutoLite spark plugs (thank Harlow), but I read you guys 'index' your plugs...what is that exactly?
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Fubar512
Dodge Dakota
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5/28/2002
14:57:01
|  RE: Idexed Plugs?
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Dr. Dakota, Try this link: Spark Plug Indexing
You should find it informative.
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Troy
Dodge Dakota
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5/28/2002
16:32:17
| RE: Idexed Plugs?
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It is where you remove the washer that comes on the plug, and install washers of different thickness to align the electrode on the plugs. These washers are specifically designed for this, and are available at Jeg's, Summit, or possibly a local parts store can get them. The gain from this is not huge, but every little bit helps.
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BlueBayou
Dodge Dakota
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5/28/2002
18:03:31
|  RE: Idexed Plugs?
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Not to dredge up more "its a hemi... No its not" debate, but what good would indexing a plug when its dead nuts in the middle of the cylinder? If it would do some good, which way would you want the plug facing? hehe
Just thought I would ask
Blue
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homey
Dodge Dakota
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5/28/2002
19:38:55
|  RE: Idexed Plugs?
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Message:
maybe they don't have 4.7's.
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Troy
Dodge Dakota
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5/28/2002
21:15:27
| RE: Idexed Plugs?
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Homey is right for me. I have a 5.9.
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Dr.Dakota
Dodge Dakota
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5/28/2002
21:20:06
| RE: Idexed Plugs?
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Message:
No, I do have a 4.7L. I read the tip Fubar sent, thanks Fubar, great article. Now my only question is which direction do I point the gap in a 4.7? I ask this because the article Fubar sent me to was not a 4.7L. Is the 4.7L the same 'quenching-area' position? Do I point the plugs in the same direction (in perspective to the intake manifold)? Any help would be greatly appreciated.
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Bob W
GenIII
5/28/2002
23:30:55
| RE: Idexed Plugs?
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Message:
Good job Fubar512 this is interesting $tuff I will try it on my 4.7
Gibson headers, Gibson Cat-back, Volant cool air system, 180 stat, Jet stage II chip, ARE Lid
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Joe Blow
Dodge Dakota
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5/29/2002
01:19:57
| RE: Idexed Plugs?
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Hey BlueBayou, the 4.7L doesn't use true hemi heads, they've been referred to as hemi heads because they're very close but not quite. There is still a flat spot in the combustion chamber.
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BlueBayou
Dodge Dakota
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5/29/2002
10:49:26
| RE: Idexed Plugs?
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Joe Blow: That is why I didn't want to get into the "hemi" debate. Whether or not the actual combustion chamber has the infamous hump, the plug is still in the middle of the cylinder and the spark would be equi-distant from the cylinder walls.
Assuming that the heads swirl the air... which they do, there would be no benefit to indexing the plugs. At least on a 4.7 or a Hemi.
Blue
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dakquad
Dodge Dakota
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5/29/2002
12:53:33
| RE: Idexed Plugs?
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Bluebayou, read the article linked above. I think that will clear it up for you. Even if it is a hemi shape there is still a better quenching area because of the flow. That's how i read it any way!
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Dr.Dakota
Dodge Dakota
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5/29/2002
13:27:44
| RE: Idexed Plugs?
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Message:
To put it all to rest...I talked to Bernd and he said its a waste of time on the 4.7L, unless its all hopped up for racing. But if you want to do it anyways, point the gap towards the middle of the combustion chamber, a little toward the intake manifold rather than towards the exhaust manifold.
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bernd
*GenIII*
5/29/2002
14:04:31
| RE: Idexed Plugs?
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Message:
Unless you've done some work to the factory heads, indexing the plugs is a waste of time/effort unless you're wanting that last 1/10th of a second out of the truck.
Factory heads have inconsistencies that may offset the indexing effort anyway.
1997 Dodge Dakota SLT - V6
Supercharged/Intercooled @ 10# w/Nitrous
14.55 @ 96.01mph
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Fubar512
Dodge Dakota
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5/29/2002
16:04:13
| RE: Idexed Plugs?
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Message:
Dr. Dakota, Blue Bayou, on a 4.7, I would orient the plug gap towards the exhaust valve.
Bernd, I wish plug indexing actually gave me a whole .10 of a second improvement in the quarter!
I gave it try, but only after replacing my plugs, cap, rotor, and wires (yes Harlow, I'm using Autolites). My G-tech times improved by .20, but I would say the bulk of the improvement came from replacing worn-out components!
Gas milage also seems to be improved, but again, I attribute that mostly to my having gone thru plugs, wires, etc.
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harlow wilcox
Dodge Dakota
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5/29/2002
20:54:58
| Way to go Fubar512!
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Message:
He has discovered the benefits of using Autolite igniton engineered sparkplugs in his rig!
He is enjoying fast, sure starts, smooth idle, improved pep and performance not to mention, improved MPG!
Try a set of Autolites today won't you?
Best of luck to Fubar512!
And remember, no matter what your ride is, you are always right with Autolite!
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Magnum Opus
Dodge Dakota
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5/29/2002
21:27:48
|  RE: Idexed Plugs?
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Harlow, Man, you are a scream!
Middy.
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