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#1
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spark plugs
I have a 428 with Edelbrock heads, Holley, ProCharger and HEI distributor housing with just the magnetic pickup in it. I use an external coil and control box. It's been 20 years since I put new plugs in it and even though it still runs good I decided to treat it to new plugs. I have always used Champion RC12YC on the street and RC9YC when I raced it. Now there are Platinum, Double Platinum, Iridium and ones with multiple electrodes. Do any of these new designs work enough better than what I have to make it worth changing? Or should I just stick with what worked in the past?
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#2
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Stick with what works.
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#3
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Stay away from Chumpions. I have had 2 fall apart on me. Electrode, gone, Engine ate it or spit it out.
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#4
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Champion isn't the same company as before. Swallowed up by big business where profits override quality.
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Ed 1968 GTO (Thanks Mom) 2006 Silverado 2007 Cadillac SRX 2015 Chevy Express |
#5
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NGK would be your best bet.
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66 GTO Nostalgia Super Stock/Street Legal Car 421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99 Multiple NSCA/NMCA World Champion 66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles 67 GTO 2dr Post, 428, Tri Power, 3.55 Gears 80 Trans Am Black SE Y84 W72 WS6 |
#6
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If it ain't broke...
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#7
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+2 NGK
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"I know just enough to keep me here, but not enough to get me out" |
#8
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Stick with a copper core plug.
NGK and Autolite would be my choices. |
The Following User Says Thank You to Formulajones For This Useful Post: | ||
#9
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40 years ago i learnt a lot of troubleshooting an engine and when the smoke and dust settled with a new set of ACDelco replacing the Champion "race-plugs" finally engine ran like it should.
Lesson learnt, avoiding "tres hombres", Champion, Mallory and MrGasket since....... |
The Following User Says Thank You to Kenth For This Useful Post: | ||
#10
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Quote:
Champions had the most brittle porcelains in the industry thirty years ago when I swore I'd never buy another one. Far as I know, nothing has changed in that respect--but since I don't buy them, my experience is very limited. Champion plugs ALSO had soft, fast-wearing electrodes back then, and so far as I know, they still do. I liked Autolite until they went to China. NGK and AC for me, now. Feedback-Fuel-injected vehicles can benefit from long-life plugs using Platinum or Iridium. Carbureted vehicles are going to leave deposits on the plugs so there's no point to long-life plugs in that application. Copper-core plugs aren't so expensive, they may be worthwhile. Multiple ground electrodes are a marketing gimmick. |
#11
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For what it's worth, NGK is Japanese so I don't view that as any better than China.....But the plugs seem okay from my experience using them. I just don't care for their backwards heat range numbers that don't follow the industry standard.
I dropped ACdelco more than a decade ago when they started screwing with their heat ranges and dropped a bunch of part numbers in the process.. As far as origin I really don't think that means a whole hell of a lot anyway as pretty much all of it is made in some other country these days. |
#12
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Don't tell anyone from Japan that. They do not like China made products or the people.
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66 GTO Nostalgia Super Stock/Street Legal Car 421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99 Multiple NSCA/NMCA World Champion 66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles 67 GTO 2dr Post, 428, Tri Power, 3.55 Gears 80 Trans Am Black SE Y84 W72 WS6 |
#13
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+3 NGK. Standard plug in my Toyota and Honda but always an upgrade in my non Jap vehicles. I cross-reference and convert ALL of my small engines to NGK.
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#14
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It's all a crap shoot these days. Buy something and try it, if it works, great, if it fails, buy somewhere else. Not a lot we can do about it, especially now. |
#15
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Quote:
Quote:
Japan = "Free world". Real elections, dissent isn't a crime. Haven't inflicted a surprise attack on us since '41. Sure there is. Quit (or reduce) purchasing from the Commies especially when there's a competing American, North American, or Free-World product. |
The Following User Says Thank You to Schurkey For This Useful Post: | ||
#16
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NGK is good stuff. They are the go-to plug in the BMW world which I am also involved with.
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1966 Pontiac GTO (restoration thread) 1998 BMW 328is (track rat) 2023 Subaru Crosstrek Limited (daily) View my photos: Caught in the Wild |
#17
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A lot of the Motorcraft plugs are made by NGK also.
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"I know just enough to keep me here, but not enough to get me out" |
#18
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It's beginning to look like I will stay with the Champion plugs I am used to. I crossed the RC12YC number and came up with 11 different NGK numbers.
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#19
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Quote:
Where as other brands like ACDelco and Champion are very limited in heat ranges, and in the case of ACDelco some heat ranges that were previously available have disappeared. |
#20
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Try the BKR6E. I use them in my Edelbrocks. They make it in a 7 as well which is colder.
ETA:The 6 would replace your 12, the 7 your 9
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'65 Tempest 467 3650# 11.30@120.31 Last edited by Scott65; 04-29-2021 at 06:34 AM. Reason: Clarification |
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