rate my plugs

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Jun 21, 2006 | 08:12 AM

7Deuce

Thread Starter

Racer

Joined: Apr 2004

Posts: 472

Likes: 0

From: Hartland WI

rate my plugs

I pulled the plugs on my 72 and they all pretty much look like the following pictures. How do you think they look? From what I've read and looking at the pictures on the NGK website they appear to be the proper heat range, etc. I'm not an expert on this so I appreciate any input.

NGK pictures

My plugs

What do you guys think?

Jun 21, 2006 | 01:40 PM

Kalway

Safety Car

Joined: Dec 2004

Posts: 4,071

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From: San Diego CA

Maybe a touch lean, but looks fine otherwise.

Jun 21, 2006 | 01:49 PM

jeckel

Instructor

Joined: May 2006

Posts: 168

Likes: 0

From: Florence NJ

Quote:

Originally Posted by Kalway

Maybe a touch lean, but looks fine otherwise.

Jun 21, 2006 | 02:00 PM

Easy Mike

Team Owner

Joined: Jun 2000

Posts: 38,923

Likes: 1,482

From: Southbound

Cruise-In II Veteran

Looks like regular no-lead to me.

Jun 21, 2006 | 02:11 PM

zwede

Race Director

Joined: Sep 1999

Posts: 11,361

Likes: 383

From: Plano TX

Not bad. It's starting to burn some oil though. Oil on the threads and the discoloration at the porcelin tip also looks like oil.

Jun 21, 2006 | 02:46 PM

Glass Act

Melting Slicks

Joined: Jul 2005

Posts: 2,545

Likes: 3

From: 406ci SB, AFR 180 Heads - 490 HP @5,600 RPM 529 lb-ft @ 4,100 RPM

By the looks of those plugs your set up is fine. Enjoy your ride

Jun 21, 2006 | 03:38 PM

ajrothm

Le Mans Master

Joined: May 2006

Posts: 9,993

Likes: 1,136

From: League City Tx

great shape really..Especially if they have been in the car a long time. Change em and forget about it! Car is running fine.

Jun 21, 2006 | 04:44 PM

norvalwilhelm

Race Director

Joined: Nov 2000

Posts: 11,872

Likes: 12

From: Waterloo ontario Canada

Quote:

Originally Posted by Kalway

Maybe a touch lean, but looks fine otherwise.

I don't thing so. I like my plugs white. New cars get better mileage AND engine longevity because of running lean. I run a blower car and run it lean. My plugs are white after a run on the expressways. After 6 years I pulled the heads and the pistons looked fantastic, very little crude on them and the valves also looked clean.
Not a sign of burning anything.
Rich mixtures don't make more power, they also shorten the life of a motor by washing the cylinder walls plus gas mileage is down.
The qualifying engines for nascar use to run leaner, hotter and more spark for a qualifying engine and then drop back to a richer mixture for the long hall.
I feel the plugs look fine and would NOT richen it up.
I have played alot with jetting and have done 4 or 5 swaps in the past week playing with my motor.
A couple of jets sizes richer can quickly mean 3 or 4 miles less per gallon.
Yes we drive street cars and gas mileage counts. I am getting about 14 0r 15 on a blown bigblock around town and a little highway thrown in.