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Old 01-30-2012, 08:17 AM   #1
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Spark Plugs

Was going to replace the spark plugs of my 91 5.0 LX and I encountered a problem, I couldn't decide what plugs to get. There are a lot of them from NGK Iridium IX to the G-Power, the V-Power, and the Ford Motorcraft OEM. I was wondering if there were any y'all would particularly recommend, since I will be sticking with them for a while. Thank you.
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Old 01-30-2012, 09:10 AM   #2
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Quote:
Originally Posted by DaBomber
Was going to replace the spark plugs of my 91 5.0 LX and I encountered a problem, I couldn't decide what plugs to get. There are a lot of them from NGK Iridium IX to the G-Power, the V-Power, and the Ford Motorcraft OEM. I was wondering if there were any y'all would particularly recommend, since I will be sticking with them for a while. Thank you.
Pretty much plugs are plugs!.. There is no real gain from them, unless you have a full aftermarket setup from like MSD!..
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Old 01-30-2012, 09:31 AM   #3
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I'm pretty sure my car is stock with the exception of the seats
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Old 01-30-2012, 09:36 AM   #4
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Quote:
Originally Posted by Eturner

Pretty much plugs are plugs!.. There is no real gain from them, unless you have a full aftermarket setup from like MSD!..
Wrong, sorry.

Depending on your temp range I suggest you use Auto Lite's, plain copper cores.. I use only AutoLite #25's some prefer #24's
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Old 01-30-2012, 09:59 AM   #5
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So there could be a slight advantage between plug types? What could those be?
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Old 01-30-2012, 10:08 AM   #6
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Heat ranges your car operates in.. For example I believe nitrous uses a colder range.
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Old 01-30-2012, 10:09 AM   #7
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Quote:
Originally Posted by deadsp0t
Heat ranges your car operates in.. For example I believe nitrous uses a colder range.
This is one
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Old 01-30-2012, 10:33 AM   #8
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Quote:
Originally Posted by deadsp0t

Wrong, sorry.

Depending on your temp range I suggest you use Auto Lite's, plain copper cores.. I use only AutoLite #25's some prefer #24's
I don't think he was asking about heat ranges and all!.. I think he was asking about using one brand over another!..
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Old 01-30-2012, 10:35 AM   #9
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Quote:
Originally Posted by Eturner

I don't think he was asking about heat ranges and all!.. I think he was asking about using one brand over another!..
Even still, they are very different.
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Old 01-30-2012, 10:43 AM   #10
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Quote:
Originally Posted by deadsp0t

Even still, they are very different.
Sorry but I do believe you are wrong on that one!... When I switched out my plugs (Factory vs Bosch Iridium) I saw no real difference between the two!.. And you don't much more different than that!.. Lol.
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Old 01-30-2012, 10:47 AM   #11
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Quote:
Originally Posted by Eturner

Sorry but I do believe you are wrong on that one!... When I switched out my plugs (Factory vs Bosch Iridium) I saw no real difference between the two!.. And you don't much more different than that!.. Lol.
First of all, you have a different engine entirely, and second anyone in the know would have told you not to waste your cash..
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Old 01-30-2012, 10:52 AM   #12
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Quote:
Originally Posted by deadsp0t

First of all, you have a different engine entirely, and second anyone in the know would have told you not to waste your cash..
True!.. But how does that support your claims as to the difference in plugs when comparing Just brands?...
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Old 01-30-2012, 10:57 AM   #13
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Quote:
Originally Posted by Eturner

True!.. But how does that support your claims as to the difference in plugs when comparing Just brands?...
Facts, not claims. Different engines like different plugs and react differently to different brands. Particularly the push rod 5.0's. I've had 5.0's for 16 years and have used about any plug you can name. AutoLite 25's or motorcraft plugs run best in 5.0's, being the OP has a 5.0......
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Old 01-30-2012, 11:51 AM   #14
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Re: Spark Plugs

as has been said, get the right range plug in copper and get a good brand but a plug is basically a plug.
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Old 01-30-2012, 01:25 PM   #15
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Re: Spark Plugs

dont get the hige dollar e3 plugs i tried them and my stang spit and spurter for 2 weeks change plugs with ngk and car ran fine ever since
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Old 01-30-2012, 03:28 PM   #16
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Re: Spark Plugs

Several years back I did a lot of research on spark plugs.I had numerous manufacturers send me examples of their latest and greatest.
I bench tested the plugs on a homemade 40,000 volt tester.
It would have been better if I could have tested them under typical cylinder pressures, but I did not have the money or means to affect that type of test.


What I found out is that, unless you need a specialized plug for forced induction or nitrous use, there are no big improvements from any of the gimmick plugs over the standard old Autolite #25 Copper Core spark plugs.


However, I did find during my research that the fine tipped Irridium spark plugs had been proven to work better for forced induction or nitrous use.
They are harder, stronger, have a higher melting point and less resistance than regular plugs. They provide a more focused ignition for better overall ignitability and improved durability.


Also Platinum plugs do last longer because of Platinum's higher melting point. They do not wear as fast as a traditional plug. They do Note: That you should not use Platinum plugs with nitrous.
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Old 01-30-2012, 07:44 PM   #17
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Re: Spark Plugs

I will also cast my vote for standard copper autolites or motorcrafts. Good plug for a good price. The expensive "special" plugs imo are just a way to seperate a man and his money.

At the very least, anything except Champion will do
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Old 01-30-2012, 08:40 PM   #18
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Re: Spark Plugs

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Originally Posted by Otlaw80 View Post
I will also cast my vote for standard copper autolites or motorcrafts. Good plug for a good price. The expensive "special" plugs imo are just a way to seperate a man and his money.

At the very least, anything except Champion will do
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I never could get much use out of Champions other than using them in lawnmower engines.
Even then they were always fouling or quitting when I was in the middle of the yard or anywhere away from the shop.
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Old 01-31-2012, 03:51 AM   #19
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So yall think #25s are the boom in a 5.0 like mine. ill have to grab some ive been wanting to swap mine ever since my pops put champs in and swaped out my dual prong v groove platnums. i could have killed him. But what can u do hes family right lol!
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Old 01-31-2012, 05:25 AM   #20
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Re: Spark Plugs

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So yall think #25s are the boom in a 5.0 like mine. ill have to grab some ive been wanting to swap mine ever since my pops put champs in and swaped out my dual prong v groove platnums. i could have killed him. But what can u do hes family right lol!
I would, but the choice is yours.
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