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16 in the same time as 8?

Which will be faster - (16) plugs in a 5.7 hemi or (8) in a 440 w/Hedman's?


  • Total voters
    13
Stop the Charger clock:
3:55pm
Somebody do the math while I clean everything up.
 
47 minutes for the GTX, 70 minutes for the Charger.
Thank you kindly, sir. :)
All cleaned up, both critters have been run and checked for problems:
IMG_20200510_171220028_HDR.jpg IMG_20200510_171227188.jpg
Everything seems to be in order here. :)

CONCLUSIONS:
1. Per plug, the Charger with its' modern 5.7 "hemi" was much quicker on a per-plug
average - but the sheer number of them (double the GTX's 440) and the redonkulous
2bazillion threads per plug both means it lost the overall contest.
Add to that all the anti-seize you MUST apply to the plug threads (and the old ones
will still fight you coming out even doing so!) and the dielectric grease needed for all
(16) boots (again, mandatory lest you rip rubber boots on coil packs!) and it makes
for a simple access/convoluted process.
IMG_20200510_134252269.jpg

Undo (2) 10mm screws per coil pack, pry the pack off the plugs, put your collection
of deep sockets and extensions together for the long reach down the plug tube and
commence to ratcheting....and ratcheting.....and ratcheting some more.
Plugs looked fine, but I did wait quite a but longer than the recommended 30k
change interval, so they fussed some when first being loosened.

2. The 440 in the GTX, hampered by the world's worst headers (ok, almost) makes
for a lot of dropsies, contortions, scrapes and nicks and what have you.
Each plug takes a different combination of tools to access it, of course.
Thankfully, it isn't a long-threaded plug and there's not much danger of seizing them
in cast iron heads, so no anti-seize needed (although I do still put a dab of dielectric
in all the boots).
(I also cussed a lot more working on the GTX as well, if anyone's keeping that score.)

Our WINNER! The GTX with (8) new J11Y plugs installed:
IMG_20200510_171158061.jpg

Old plugs didn't look too awful bad, either:
IMG_20200510_155703079.jpg


Hands trashed, wrists sore from all that ratcheting, I decided to keep going and climbed
under the GTX to patch up the old 3" exhaust where the previous owners' welding skills
*cough* yielded a rod "hanger" that had managed to rip off the side of a pipe in front
of the muffler, leaving a gash.
Ground it smooth, cut a patch out of some spare 3" pipe I had and clamped it in there
with a heavy duty clamp, then installed a proper hanger like Ma Mopar intended.
(I don't have any welding gear, nor the talent to perform such. We improvise and adapt
around here.)

Thanks to everyone who participated in the poll - and as usual, FBBO members knew
best! :thumbsup:
 
well the new muscle (16) plugs last 10 or more times as long
as the older muscle "usually"

a better ignition, hotter & a longer spark, like 20* of dwell burn,
in the old muscle (8)
will help burn all the extra fuel, make the plugs last longer
 
Last edited:
I guessed wrong, but then i wasnt familiar with all the other "stuff" that had to get out of the way first on the charger. And i dont have hedmans, but i know it takes more time to do #5 and #6 than the other six plugs combined, with my ancient hookers.

Okay you guys, stop visualizing ancient hookers!
 
I guessed wrong, but then i wasnt familiar with all the other "stuff" that had to get out of the way first on the charger. And i dont have hedmans, but i know it takes more time to do #5 and #6 than the other six plugs combined, with my ancient hookers.

Okay you guys, stop visualizing ancient hookers!
:rofl:

I actually really like the setups on the modern hemi's. The plugs are right there on top and there's no plug wires
to fool with - you slap the coil packs right down on top of the plugs.
Wish we could do that with our old ones, equipped with old hookers or not. :lol:

I suppose a fella could have skipped the anti-seize and dielectric grease applications if he were not worried about
ever changing plugs again, but the next fella after him would be seriously pissed. :)
Nope, gotta do it. I've seen what happens to them when you don't.
 
well the new muscle (16) plugs last 10 or more times as long
as the older muscle "usually"

a better ignition, hotter & a longer spark, like 20* of dwell burn,
in the old muscle (8)
will help burn all the extra fuel, make the plugs last longer
These modern hemi's had standard "copper" plugs in them from the factory (Champions) that
Chrysler says to replace every 30k miles. That has always sort of confused me, what with all the trick
long life plugs out there these days.
Other manufacturers use plugs with 100k life cycles, after all - so why are these hemi's any different?
Why do they insist on using old technology plugs in them?
I've had more than one Chrysler rep over the years tell me to stick with the Champions because using
any platinum, iridium, what have you type plugs "confuses" the computer on-board.
Sounds like a load of hooey to me, but I stick with the Champions in the truck and the Charger anyways.
 
344,000 miles on my 2007 Ram and all that I have used has been the OEM spec Champion plugs,
 
I have also read the iridium plugs can mess with some computers.

I found way back when my hands worked it didn't take long to do the plugs on the 65 383 Sport Fury with HP manifolds. The difficult ones were easy using a spark plug socket and an end wrench. Break em loose and turn em out by hand. Can't see what you are doing but it was quick.
 
I have also read the iridium plugs can mess with some computers.

I found way back when my hands worked it didn't take long to do the plugs on the 65 383 Sport Fury with HP manifolds. The difficult ones were easy using a spark plug socket and an end wrench. Break em loose and turn em out by hand. Can't see what you are doing but it was quick.
Yep, some even with headers are a "feel, not see" affair. Heck, most of 'em are. :)
 
Yep, the HP manifolds came off a friend's 70 Charger RT and Boomers went on it. Wasn't bad but on both cars they better be cold.
 
did my 5.7 in the magnum today 1.5hrs. without hurrying and taking a few calls. I didn't put anti seize on them on purpose, if they don't come out in 5yrs. who cares!it'll be time for an upgrade anyway! about 5 years on the platinums and the ground electrode was starting to wear away, gaps opened about .005-.010 about 50,000K
 
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