SparkPlug Gapping

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Nov 27, 2004 | 04:37 PM

Hawk350

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Joined: Aug 2001

Posts: 499

From: Grand Island, NY

SparkPlug Gapping

I am putting in NGK 4554 plugs into my car.....I will have to gap them right? What is the normal gap needed for lt1 heads? Thanks In Advance.

Nov 27, 2004 | 04:58 PM

joeSS97

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Joined: Jun 2001

Posts: 1,781

From: Detroit area

Re: SparkPlug Gapping

.050""

Nov 27, 2004 | 05:08 PM

Hawk350

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Registered User

Joined: Aug 2001

Posts: 499

From: Grand Island, NY

Re: SparkPlug Gapping

thanks

Nov 27, 2004 | 05:09 PM

Hawk350

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Registered User

Joined: Aug 2001

Posts: 499

From: Grand Island, NY

Re: SparkPlug Gapping

by the way, what kind of plugs are you guys using on heads and cam applications? Mine seem to be black when I take them out....either I am running rich or I need a new tune..

Nov 27, 2004 | 05:16 PM

joeSS97

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Posts: 1,781

From: Detroit area

Re: SparkPlug Gapping

I use Delco Rapidfires.With a PCMforless tune...you probably should have a tune...or need new O2s".

Nov 27, 2004 | 05:19 PM

Hawk350

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Joined: Aug 2001

Posts: 499

From: Grand Island, NY

Re: SparkPlug Gapping

Quote:

Originally Posted by joeSS97

I use Delco Rapidfires.With a PCMforless tune...you probably should have a tune...or need new O2s".

O2's a brand new...car was dyno tuned but 3 plug wires were burnt though so I am not sure how good the tune turned out. EGR valve was also removed and cleaned.