C4 spark plugs?

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Nov 22, 2006 | 09:38 PM

bigstu2203

Thread Starter

Intermediate

Joined: Aug 2006

Posts: 25

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From: Taylors SC

C4 spark plugs?

What spark plugs would you recommend for a 1990 C4 with the standard 5.7 L V8 engine?

Nov 22, 2006 | 11:36 PM

VetteUSA

Le Mans Master

Joined: Dec 2004

Posts: 7,475

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From: Austin TX

St. Jude Donor '07

Seems that most folks here use and recommend the NGK plugs.

I, however, went with the OEM ACDelco Platinums on my 93.

Last edited by VetteUSA; Nov 22, 2006 at 11:56 PM.

Nov 22, 2006 | 11:50 PM

Red Tornado

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Joined: Sep 2002

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From: OBAMA IS HITLER

either the conventional acdelco coppers #FR5LS, or the platinum acdelco rapidfire #5's.

Last edited by Red Tornado; Nov 23, 2006 at 12:01 AM.

Nov 23, 2006 | 12:25 AM

65Z01

Team Owner

Joined: Dec 2000

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From: SE NY

Cruise-In II Veteran

I run the stock AC Delco plugs in the Vette and in the IROC-Z, both with cut-back electrodes for a little extra efficiency & power.

Nov 23, 2006 | 01:07 PM

rick lambert

Le Mans Master

Joined: Oct 2003

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From: seattle WA

Well, mines an 87, but I've always had best luck with AC Delco, if you check their website you know you'll be getting the right plug.Funny, in the ole days it was always Champion for me.

Nov 23, 2006 | 01:15 PM

JLeatherman

Burning Brakes

Joined: Sep 2006

Posts: 1,202

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From: MD

Quote:

Originally Posted by rick lambert

Funny, in the ole days it was always Champion for me.

Never again will I use a champion plug in anything. The company I was working for last summer ordered a round of Champion plugs for use in their airplane engines. In total, it was over a thousand plugs. Every 15th or 20th plug failed almost immediately. Inspection showed flaws in the porcelain allowing the plug to arc internally instead of at the electrode. I'll never trust my engines to champion plugs again.

Nov 23, 2006 | 01:29 PM

skybolt31

Drifting

Joined: Dec 2003

Posts: 1,492

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From: Westfield MA

I use the AC Delco Standard 41-629 in my 86. Even standard plugs last so long these days it seems worth getting something fancy. Your milage may vary...........................