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 FAQ: Which Spark Plugs & Ignition Wires should I use?

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Abaddon
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Thu Dec 04, 2014 3:16 pm

+1 on the AutoLite coppers. I change them out usually once a year (just 'cause), and the electrodes are already showing significant wear.
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Thu Dec 04, 2014 6:08 pm

That driver side plug is a total PITA. I'm only 5'4" and where the car was on the lift made it so I had to stand on a big block of wood so I could get my arm up there. Any lower on the lift and the car would've been too low. Oh well. Got the plugs and wires done.

I was relieved that none of the rear wires corroded onto the plug and broke. Two of the front ones did.
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Sun Dec 07, 2014 11:19 pm

Example of one job that's easier done from the top.

_________________
'98 SC Riviera • 268k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180Ί t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch


'05 GTO • 49k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun
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KnottyEagle
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Mon Dec 08, 2014 6:43 am

My arms aren't long enough.
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Wed Dec 24, 2014 3:08 pm

Anyone have luck with the MSD 8mm wires? I see a few people have them but haven't really seen anything about reliability/durability.
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Thu Dec 25, 2014 12:36 pm

I use a set of taylor thundervolts i paid around 40$ clearance from part source (like an autozone but canaduh) and for plugs al104s gapped to .55 in the riv and used them in my lss before , they wear out so damn fast though but there cheap as hell so i do em 3 times a year, i always notice kr reduction whenever i replace em with fresh ones !
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Fri Dec 26, 2014 9:07 pm

matt270avian wrote:
Anyone have luck with the MSD 8mm wires? I see a few people have them but haven't really seen anything about reliability/durability.

I don't know about these on our cars, but my understanding is that the MSDs wires are good wires. They are completely overkill, only get them if you are going after a particular look, the stock wires are excellent.
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Fri Dec 26, 2014 10:05 pm

deekster_caddy wrote:

matt270avian wrote:
Anyone have luck with the MSD 8mm wires? I see a few people have them but haven't really seen anything about reliability/durability.


I don't know about these on our cars, but my understanding is that the MSDs wires are good wires. They are completely overkill, only get them if you are going after a particular look, the stock wires are excellent.

I got them for the same price as stock wires, so I figured why not.
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Tue Mar 03, 2015 5:28 pm

Update on my MSDs:

Functionality wise they work as advertised. No major complaints or downfalls here.

What really bothers me is the design of the boots. They're angled kind of weird so it's hard to keep them away from the manifolds. This angle also makes it really hard to get the boots seated all the way so it's entirely possible for one of them to fall off/come loose and cause misfires.

Another complaint is the wire separators/holders. You have to be pretty careful inserting/removing the wires because the holders will put a cut in them fairly easily.

Lastly, the wires are a bit long. Granted, they might not specifically be only for the L67, but still.
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Tue Mar 03, 2015 5:51 pm

matt270avian wrote:
Lastly, the wires are a bit long. Granted, they might not specifically be only for the L67, but still.

I assume you bought the MSD's designed for the GP? They are going to be longer. The GP (or W body) has a different routing than a G body. They have to be longer....
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Tue Mar 03, 2015 6:11 pm

Yep. How is the routing different on the GPs? I've never really looked....
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Wed Mar 04, 2015 9:42 am

matt270avian wrote:
Yep. How is the routing different on the GPs? I've never really looked....

For starters, the GP has those "dog bone" mounts on the front of the engine. The wires take a giant dip underneath the RF mount as soon as they leave the coils. That adds length. They just have a few more things to go around/attach to in order to keep them out of harms way.
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Thu Mar 12, 2015 3:11 pm

I changed the plugs on my 97 riv yesterday. It has 90000 miles and bone stock. The ones that were installed were NGK laser irridium. They looked pretty good and I'm pretty sure they were original. The gap was still at.060. I tried to be careful when I pulled them out so I could save them but I broke the ceramic on a couple. Anyway after checking out some posts about the 3800 series 2 I decided to install conventional ac delco plugs 41601 gapped at .058. I swear that made a BIG difference in acceleration. So anyway my buddy has a 92 riv with 35000 original miles. We pulled the plugs out of it and those are worn to over .090. They were conventional plugs too probably original. We put 41601 plugs in his riv too. I noticed the spark plug wires are discolored at the coil. Maybe they were running hot jumping that huge gap on the plugs?  Has anyone ran these ac delco 41601 plugs on a supercharged riv? And if so for how long? You can get them for 1.45 at rockauto. I didn't think they were that hard to change once you figure out the right tool combination. That's four plugs for the price of one irridium. Thanks
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Fri Mar 13, 2015 7:29 pm

The "Iridium" plugs are supposed to be 100,000 mile plugs. The '92 didn't have those. I'm surprised at the gap with only 35K but that's not unheard of.

Your '97 did not come stock with NGKs, somebody replaced them along the way.
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Sat Mar 14, 2015 3:41 pm

That's what sucks about buying used cars you never know what has been done to them. At least they went with top of the line plugs. Those same NGK lazer irridium plugs are 7.50 each at rock auto. I'll pull one of those conventional plugs I installed after 10000 miles see how they look.
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Sat Mar 14, 2015 9:16 pm

Just put in some Belden wires.  The N/A  (700949) has a different p/n than the SC (700951) applications.  Hopefully they hold up.  I kept the receipt.

I probably should have
a) read this thread 1st; and
b) pulled pin when I noticed the box said 8-cyl at the store, but only contains 6 wires.  The box has the correct p/n printed on it.

I'll report back if they fail.

albertj wrote:




AA wrote:
Well I'll be a sonuvabitch. Knowing good and well what could happen, I went and tried NAPA's Beldon brand ignition wires on my Grandpa's '96 SC Riv. He'd been experiencing that pulsating hesitation we commonly see with these engines around 100-150k, when the wires start to wear out. I knew it was the wires, so I drove 300 miles to do the job, but I didn't have time to order the OEM Packard/Delphi wires, so I bought NAPA's "best". The sales clerk told me he'd "never seen a pair returned for any reason." They weren't cheap, and I thought they would be good enough for Grandpa.

Well, they weren't good enough. After a month of trouble-free driving, got a call. Same problem again. He got it scanned - multiple misfires. The guy at NAPA is about to get his "first" returned set of Beldons from us!

I can't believe it. We preach and preach about OEM wires being the best, and I thought maybe this time I'd get lucky with a solid brand from NAPA. Nope. Sorry Grandpa, and shame on me! I'd say lesson learned, but I knew better.

headbutt headbutt headbutt headbutt

Order placed. Heading out to fix the problem when they arrive. So frustrating!

PS - spark plugs looked good as new. We re-gapped them and reinstalled. The car ran completely free of misfires for 4-5 weeks.




The 3800 NA uses the same wires, they work ok in that application.  The coils on the SC Riv are MUCH higher energy and they turn the Belden wires into plasma at the crimps.
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Sun Mar 15, 2015 11:21 am

Jason, I may have jumped to conclusions after the Beldon install. After replacing the wires with a fresh set of Delco/Delpi, the problem didn't go away. We replaced all the plugs, and suspect a bad coil. I sold the Beldon wires on eBay for $25.

_________________
'98 SC Riviera • 268k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180Ί t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch


'05 GTO • 49k miles • 0-60: 4.8s • 16.9 avg MPG • Nelson Ledges Lap: 1:26
Because fun
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http://www.cardomain.com/ride/657082/4
Jason
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Sun Mar 15, 2015 4:26 pm

AA wrote:
Jason, I may have jumped to conclusions after the Beldon install. After replacing the wires with a fresh set of Delco/Delpi, the problem didn't go away. We replaced all the plugs, and suspect a bad coil. I sold the Beldon wires on eBay for $25.

Glad to hear. The Beldens were cheap at $40 cdn at Napa with a lifetime warranty. With the headers, plugs and wire are a breeze. If they crap out, I'll just get a refund and go for Delco.
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Wed Apr 22, 2015 11:16 pm

turtleman wrote:
Basically my only plans in terms of modification right now is a 3.4 pulley & intake plumbing (and 180 tstat & higher flow mufflers in case it makes a real difference) and i will pretty much always be using 91-93 oct gas just depending on what station i go to. my question is do i want to use 605 or 104 plugs?


lmfao dunno


So funny..
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matt270avian
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Wed Apr 22, 2015 11:46 pm

Hey, we've all been there......
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PostSubject: Re: FAQ: Which Spark Plugs & Ignition Wires should I use?   Thu Apr 23, 2015 12:00 am

I just wanna go where Turtles going.. 11s? twisted
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