NGK Spark Plugs..
 

I did some work on some of the cars this weekend including our 68 Butternut Yellow BB car....I thought the performance seemed a little off, so I pulled all 8 plugs (R43XLS AC's)..they looked a little worse for the wear. Our carb doc(Eric) recommended I go to the NGK and increase two heat ranges. So, I got some NGK BPR4ES #7222 plugs, gapped them at .35 and installed. The idle speed increased 200 rpm's on it's own https://www.yenko.net/ubbthreads/imag...mlins/grin.gif Car runs strong and smooth now...thanks to Eric for his typical sage wisdom https://www.yenko.net/ubbthreads/imag...lins/beers.gif

wilma

Re: NGK Spark Plugs..
 

Our L72 and L78 engines always ran fine with the AC 43N plugs. If and when I can't get them, NGK would be my second choice. With unleaded gas the plugs last me at least four times longer than when I was using leaded gas. A friend used to do mostly city driving and ran the 44Ns and tried 46N but thought they might be a little too hot. He never had any damage done though.

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NGK's are ok Tom but any plug change especially in a BB would show a gain. I tried the NGK's for awhile and did not have the luck I do with running R44S Delco's in my Z. https://www.yenko.net/ubbthreads/imag...lins/dunno.gif

Re: NGK Spark Plugs..
 

[ QUOTE ]
NGK's are ok Tom but any plug change especially in a BB would show a gain. I tried the NGK's for awhile and did not have the luck I do with running R44S Delco's in my Z. https://www.yenko.net/ubbthreads/imag...lins/dunno.gif

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Thanks for the technical support https://www.yenko.net/ubbthreads/imag...s/rolleyes.gif

Re: NGK Spark Plugs..
 

[ QUOTE ]
NGK's are ok Tom but any plug change especially in a BB would show a gain. I tried the NGK's for awhile and did not have the luck I do with running R44S Delco's in my Z. https://www.yenko.net/ubbthreads/imag...lins/dunno.gif

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When we were dyno'ing one of our L72s back in 2000 I had an ever so slight stumble I couldn't get rid of...kept trying new plugs (strictly AC's), changing heat ranges, gaps, etc...couldn't fix it. Dyno guy asked if he could make a suggestion, and had the parts store run over a set of NGK's...the rest as they say is history.

Unfortunately, the AC plugs you buy today aren't the same as they used to be...matter of fact, I believe they're made by Champion.

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Rob, I agree with this...after doing the BB car I wanted to put some new plugs in the 69 granny 6 cylinder. They didn't have the NGK's for that motor..so I installed a new set of AC Delco's. It still has a slight roughness to the idle...I plan to find some NGK's and try them for comparison. We have them in several of the 70 L78 cars and they work great.

wilma

Re: NGK Spark Plugs..
 

NGK's!!!! Endorsed by the Hillbilly Racing Team!!!! Even makes my old boat hum! https://www.yenko.net/ubbthreads/imag...ins/3gears.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif

Re: NGK Spark Plugs..
 

[ QUOTE ]
NGK's!!!! Endorsed by the Hillbilly Racing Team!!!! Even makes my old boat hum! https://www.yenko.net/ubbthreads/imag...ins/3gears.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif

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Spot on! I just ordered up a spare set of NGK's to swap out - mine is starting to stumble a bit because I've been idling around town with the track fat jets in it. I'm suspecting they are a bit fouled, we'll see!

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All the finish dyno pulls we have made on the LS6 motors were using NGK and there was a noticable improvement over the stock plugs. Once the dyno pulls are made I reinstall the AC plugs for correctness.

Re: NGK Spark Plugs..
 

I really don't remember why I even tried them (even against my own father's advice!) but I've always had really good luck with the Champions in my closed-chamber LS-6. I'll have to look at the number of them because I can't remember right now, but there's a way to change a digit or two in the plug # to revert down to a 5/8 plug from that giant 13/16 plug. That really made plug changes a little easier especially on a car with headers. If anybody's interested, I'll get the numbers.

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Trivia question: AC is an abbreviaton/acronym for?


Answer

Re: NGK Spark Plugs..
 

Without looking at the answer...Albert Champion.

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I used to run strictly AC plugs. After reading Toms's posts about NGK plugs I gave them a try because I was having a miss at cruise rpm in my new 406. After putting the NGK plugs in it, I've had great results. The engine runs so much better. I have since put NGK plugs in everything else I own and I noticed a performance/drivabilility improvement in each vehicle. Whats great about it is that they are only $2. I have an auto restorer magazine at home that I recently got in the mail and they did a comparison on 12 or so different spark plugs. They ranged in price from about $1.50 to $12.00. The regular NGK plugs won the contest. https://www.yenko.net/ubbthreads/imag...mlins/grin.gif The next time I go home I'll try to scan the article in so everyone can read it.

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I have one box of the old AC43N plugs left and will keep them for the COPO engine. I'll have to try the NGK plugs from now on in the 396. I used them years ago in my snowmobiles when the Bosch plugs just didn't work. We didn't need to carry spare plugs after that.

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I used NGK plugs in my 67 442 and it was night and day compared to the AC plugs I was using. They really woke up the motor. Very inexpensive hp increase.

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If anyone is looking for pretty near an exact copy of the AC 43N in NGK the number is B7ES. I've been running them for a couple of years and have had terrific luck with them.
Jim

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I too have had good luck with NGK.

I have also done a bunch of research on how plugs are made. Champion is sort of unique in manufacturing. If you've got any laying around, you can actually unthread the metal plug connector form the porcelain. You can then see the talc, spring and resistor (or not depending). Kinda neat to see the anatomy of a spark plug.

I would suspect that if Champion is making AC plugs, they would be making them to AC spec, and not necessarily their own. I bet you can still unthread a Champion end, while the AC plugs probably are assembled as they always were. Not saying anything about the quality of the old vs new other than they are not equivalents of each other just because Champion makes both.

Re: NGK Spark Plugs..
 

[ QUOTE ]
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NGK's!!!! Endorsed by the Hillbilly Racing Team!!!! Even makes my old boat hum! https://www.yenko.net/ubbthreads/imag...ins/3gears.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif https://www.yenko.net/ubbthreads/imag...ins/3gears.gif

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Spot on! I just ordered up a spare set of NGK's to swap out - mine is starting to stumble a bit because I've been idling around town with the track fat jets in it. I'm suspecting they are a bit fouled, we'll see!

[/ QUOTE ]I only run the old AC plugs. Maybe the new ones are junk. I tried the NGK's and had good results but they did seem to foul a little around town over the older AC's. I am a little rich in the primaries too. I also had good luck with the Autolite 85 or 86's. https://www.yenko.net/ubbthreads/imag...lins/dunno.gif

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For those interested, below is a link to a post I made a couple years to help with the questions I was getting about *which* NGK plugs for which heads...

click here

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I'm running XR5's, love 'em.

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Spark plug test article from Andy...

https://www.yenko.net/attachments/spa...lug%20test.pdf

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Suprisingly old AC Delco is right there.

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Called NGK yesterday to find out what to run in my stock 70 LS5. He said the replacement for the R43T is a NGK 2405.

Not sure if I really got the warm and fuzzy from this guy....But that is what he told me.

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I just may have to give a set of NGK's a shot in the ol' LS-6 of mine and see how they compare to my usual plugs.

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Our AC Delco Store up here is telling us that NGK had been making the Delco Plugs for the last 3-4 Years.

Kevin

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I just read that same article today and my question is: what is the difference between V Power and G Power on the NGK plugs?? The NGK G power were the ones tested and rated #1 in this article and they actually added almost 7hp on the dyno according to this article.

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Looks like V Power is more of a standard plug, while the G power has a smaller tip- which is generally accepted as the prefered design with air gap plugs.

I have seen multiple electrode plugs make more power on small turbo engines, so to state the obvious- these results may not carry accross all engines. Regardless, NGK makes a good plug.

Although precious metal plugs do cost more money, the value is not as much in performance as it is in plug life. I also beleive most precious metals are not as conductive as say conventual materials.

Those mystery plugs are kind of neat. They require less energy to jump the gap since it is able to travel across the surface rather than having to jump through the air. I tend to beleive the old combustion chambers were designed with a conventional spark plug. Most multiple electriode plugs, surface gaps and such just aren't ideal for our old engines.

Having the spark fire form a tiny tip works with a conventional design. Unfortunately the tiny surface is much more suceptible to errosion form spark so you'll probably only see them in precious metals. I think it would be great if they made a set with conventional materials for the increased conductivity, but they wouldn't last long, and it they erroded too quickly then it could actually effect the tuen of the engine. Sorry for the ramble.

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Rob , does a cross reference list exist for the G power NGK's.?

Rehashing an oldie here. Folks still prefer the NGK plugs in the L78/LS6 engines.?

Yes, NGK over all others.

Are folks using the NGK G power vs. the V Power.? I have been using the V power 2771 UR5's for a long time. I guess no complaints, just checking to see if there is an NGK upgrade.? TY