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Post Info TOPIC: Big block spark plugs
LT1Caddy


Poncho Master!

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Big block spark plugs
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What brand of plugs are BB guys running in their cars ?  Just trying to get a handle on the  "best" brand. On another website I saw that NGK's are the latest fad.  I just finished having a big problem with a 4 stroke out board and the mechanic said to get rid of the NGK's!

Back in the 90's, guys were running Autolites. Never heard anyone running Champions though, performance guys.

Just curious



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73SC


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I run what the General put in'em at birth.... AC Delco.



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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
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4SPEED427


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There is no better plug for a big block than an AC Delco. 

Champions are good for Chryslers and lawn mowers.



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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
seventy2plus2


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AC Delco only.

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70 2+2 convertible
70 2+2 hardtop
70 Parisienne hardtop

 

 
gtodrive


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AC Delco in my 427. Tried using Champions in my American Pontiac 428s and could never get them to run properly.confuse Put the Delcos back in and no problem!



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'69 427 2+2 Convertible
65 SD L79


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AC= American Chinese



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694279


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hi i have lots of  R43 XLS  NOS  WORK PERFECT FOR BIG BLOCK CHEVYS



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73SC


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Seems unanimous! AC Delco.



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Ray White, Toronto ON

Formerly - The one and only 1973 LeMans 454 "Astro-Jet"

Built March 9, 1973 - Oshawa ON

1993 Corvette Convertible LT 1

Built January 10, 1993 - Bowling Green Kentucky 

 
DonSSDD


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AC Delco in the 409, work great but rust more than some others. Ive found the OE brand works best in most of my engines, be that AC Delco, NGK, Denso, or champion- in lawn mower or chain saw. Anything else and youre playing with fire.

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63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC.
1963- Pontiac top selling car in Canada

Mahone Bay, NS Still not old enough to need an automatic
LT1Caddy


Poncho Master!

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I'm surprised it is unanimous. I guess most of the guys here are just street driving, not racing.

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4SPEED427


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Why couldn't you use AC plugs if you are racing?

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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles 

1966 Grande Parisienne, 396 1 of 23 factory air cars (now converted to a "factory" 4 speed)
LT1Caddy


Poncho Master!

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Back in the 90's when I was in racing heavy I saw lots of guys running Autolite plugs in BB cars. drag racing and road racing. I had a LT1 small block then, warmed over 475HP. It was a lot "friendlier " racing then. I would help guys tuning their cars and they said the Autolites didn't foul nearly as much as Delco plugs. I just took their word for it, numerous guys did it. I was running a SB and beating most of them at the time.
I was on another website lately and the question came up and now guys are saying NGK's are the "hot" ticket.
As I stated, just wondered what the BB guys here were running.......

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