Spark Plugs
Thread Starter
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Mountain Pass
Joined: Dec 2003
Posts: 170
Likes: 1
From: KS
Spark Plugs
What does everyone run in their V10 for
spark plugs when you change them ?
I want to change plugs this spring and I
want a good replacement that will last.
Should I stay with Motorcraft or how
about NGK's, Autolite, etc.
Just looking for suggestions ......... Thanks.
spark plugs when you change them ?
I want to change plugs this spring and I
want a good replacement that will last.
Should I stay with Motorcraft or how
about NGK's, Autolite, etc.
Just looking for suggestions ......... Thanks.
Elder User
Joined: Jan 2004
Posts: 920
Likes: 2
From: Colville
Jhemr, Just rember that platinum melts at an extremly high temp. so it lasts long. But Platinum has the resistance of wet wood, so performance is not good. If you don't mind changing your plugs every 30,000 miles than a good copper plug is still hard to beat for performance. Most manufactures these days install platinums from the factory and then brag about 100,000 miles before a tune up. The best performance measurement for a sparkplug is the resistance of the metal used, this basicly is a measurement of how much energy that pases through the plug (good) versus how much enery doesn't pass, due to the metals inability to transfer electric current, like a cloged water pipe with holes. on one end you have water goining in under high pressure but limited volume.
on the other end you have very little pressure due to the fact that 25% of the water that entered the pipe leaked out and never made it to the other end.
on the other end you have very little pressure due to the fact that 25% of the water that entered the pipe leaked out and never made it to the other end.
Postmaster
Joined: Jan 2003
Posts: 4,417
Likes: 3
From: Durham, NC
Originally posted by 68 351 bronc
Jhemr, Just rember that platinum melts at an extremly high temp. so it lasts long. But Platinum has the resistance of wet wood, so performance is not good. If you don't mind changing your plugs every 30,000 miles than a good copper plug is still hard to beat for performance. Most manufactures these days install platinums from the factory and then brag about 100,000 miles before a tune up. The best performance measurement for a sparkplug is the resistance of the metal used, this basicly is a measurement of how much energy that pases through the plug (good) versus how much enery doesn't pass, due to the metals inability to transfer electric current, like a cloged water pipe with holes. on one end you have water goining in under high pressure but limited volume.
on the other end you have very little pressure due to the fact that 25% of the water that entered the pipe leaked out and never made it to the other end.
Jhemr, Just rember that platinum melts at an extremly high temp. so it lasts long. But Platinum has the resistance of wet wood, so performance is not good. If you don't mind changing your plugs every 30,000 miles than a good copper plug is still hard to beat for performance. Most manufactures these days install platinums from the factory and then brag about 100,000 miles before a tune up. The best performance measurement for a sparkplug is the resistance of the metal used, this basicly is a measurement of how much energy that pases through the plug (good) versus how much enery doesn't pass, due to the metals inability to transfer electric current, like a cloged water pipe with holes. on one end you have water goining in under high pressure but limited volume.
on the other end you have very little pressure due to the fact that 25% of the water that entered the pipe leaked out and never made it to the other end.
1000's of ohms series resistance in plug wires!!!
Postmaster
Joined: Jan 2003
Posts: 4,417
Likes: 3
From: Durham, NC
Originally posted by 68 351 bronc
So you disagree that platnum has more resisstance than copper?
So you disagree that platnum has more resisstance than copper?
performance!! The "effective series resistance" number of < 5
ohms is for Motorcraft platinums, which are the best plugs to use in Ford engines (IMHO).......
Sit. Stay.
Joined: Oct 2001
Posts: 18,308
Likes: 20
From: Washington State
Originally posted by 68 351 bronc
If you don't mind changing your plugs every 30,000 miles than a good copper plug is still hard to beat for performance.
If you don't mind changing your plugs every 30,000 miles than a good copper plug is still hard to beat for performance.
The insignificant performance increase is severely offset by the desire to keep the skin on the knuckles and the curse words out of kid's ears.
The Motorcraft platinums are good plugs.
Just get the updated ones.
Thread Starter
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Mountain Pass
Joined: Dec 2003
Posts: 170
Likes: 1
From: KS
The Motorcraft platinums are good plugs. Just get the updated ones.
Just get the updated ones.
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Postmaster
Joined: Jan 2003
Posts: 4,417
Likes: 3
From: Durham, NC
Originally posted by jhemr
What did they update on them, or how do you tell ?
What did they update on them, or how do you tell ?
double platinum P/N for my 3.0L FFV was AGSF12PP, the new
"Fine Wire" platinum P/N is: AGSF12FMF6
I hope this helps!!!!!
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Senior User
Joined: Sep 2003
Posts: 185
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Originally posted by Monsta
This picture will show the difference between the early model year V10 and the latter. More threads on the latter. Not sure if you can read the the part number or not...
This picture will show the difference between the early model year V10 and the latter. More threads on the latter. Not sure if you can read the the part number or not...
Sit. Stay.
Joined: Oct 2001
Posts: 18,308
Likes: 20
From: Washington State
Originally posted by bigdawg460
Is the extra threads to keep them from blowing out the head?
Is the extra threads to keep them from blowing out the head?
Still a safer bet than the short threaded plug. IMHO
Elder User
Joined: May 2003
Posts: 520
Likes: 1
From: california
How many hours does it take to change these plugs? I had a chrysler w/440 that would take me 45 min. My Ford 390 takes a fraction of that time. I'm dreading that day. I don't want to take it to the dealership. I can just imagine the cost and I don't like anyone else messing with my vehicles if I can help it. The last time I brought the truck into the dealer, the knucklehead that drove it out for me was riding the clutch.