spark plug gap

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Jun 19, 2003 | 09:59 AM

Jim D

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Drifting

Joined: Jan 2001

Posts: 1,396

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From: Mickleton NJ

spark plug gap

I just bought a set of TR55IX plugs, and I checked the gap from the factory . They are all .055, is this gap OK, and do the plugs have to be torqued, my plug wires are on back order, I think all you guys are putting in new plugs and wires. My car is a little hard starting , hope this helps, thanks for your help as usual, Jim.

Jun 19, 2003 | 10:15 AM

davidfarmer

Race Director

Joined: Sep 1999

Posts: 12,422

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From: CONCORD NC

Re: spark plug gap (Jim D)

Those wires are very durable, but if it makes you feel better, buy new ones.

I run .045" due to high compression. You should gap the plugs to factory specs.

Jun 19, 2003 | 11:52 AM

chuckster

Race Director

Joined: Mar 2000

Posts: 17,602

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From: Palm City Florida

Re: spark plug gap (Jim D)

I set my NGK Iridiums to .050.. this way if the gap opens with time I am still in spec up to .060..

Smaller gap may also help eliminate misfires

Jun 19, 2003 | 01:04 PM

Highroller

Burning Brakes

Joined: Feb 2003

Posts: 1,016

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From: Bristol Ct

Re: spark plug gap (Jim D)

Quote:

Jim leave them alone and install them the way they were gapped, especially if your Vette is stock, I've got them in my 383 engine in my SS Camaro, after 23k the gap is still around .058. Don't forget that even with the pucks falling the stock plugs they still fire. Plus you stand a chance snapping the iridium tip. Install and :steering:

Jun 19, 2003 | 02:39 PM

IM4A2Z

Racer

Joined: Oct 2002

Posts: 473

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From: Addison TX

Re: spark plug gap (Jim D)

I gapped my TR55's at .045 on the advice of a local tuner. said it would help decrease the chance of knock under hard acceleration during the hot summer months here in Dallas.