NGK Spark Plugs..

**Salvatore** · #1 04-06-2010, 07:37 PM

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.

**WILMASBOYL78** · #2 04-06-2010, 08:59 PM

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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.

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Thanks for the technical support

Chevy454 · #3 04-06-2010, 09:19 PM

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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.

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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.

**WILMASBOYL78** · #4 04-06-2010, 09:39 PM

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

**SmallHurst** · #5 04-06-2010, 09:41 PM

NGK's!!!! Endorsed by the Hillbilly Racing Team!!!! Even makes my old boat hum!

**YENKO DEUCE REGISTRY** · #6 04-06-2010, 09:44 PM

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NGK's!!!! Endorsed by the Hillbilly Racing Team!!!! Even makes my old boat hum!

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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!

**SS427** · #7 04-06-2010, 10:32 PM

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.

**markjohnson** · #8 04-06-2010, 11:43 PM

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.

ORIGLS6 · #9 04-07-2010, 12:51 AM

Trivia question: AC is an abbreviaton/acronym for?

Answer

**Salvatore** · #10 04-07-2010, 06:51 AM

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NGK's!!!! Endorsed by the Hillbilly Racing Team!!!! Even makes my old boat hum!

[/ QUOTE ]

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.

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