spark plugs

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Jun 19, 2008 | 09:43 PM

#21

Mike Ward

Race Director

Joined: Jul 2001

Posts: 15,892

Likes: 42

Quote:

Originally Posted by glenkov48

Has anyone shown any ACTUAL proof--dyno testing, et's, etc-- that foreign or speciality plugs are better?

Of course not- marketing, marketing, marketing.

Jun 19, 2008 | 10:02 PM

#22

gofastvette

Racer

Joined: Feb 2005

Posts: 317

Likes: 2

From: coral gables miami

Quote:

Originally Posted by Durango_boy

Hmm...I thought NGK was American. I'll have to check.

Nope, from the land of the rising sun...

Jun 20, 2008 | 11:22 PM

#23

DC3

Melting Slicks

Joined: Apr 2001

Posts: 2,030

Likes: 363

From: Lubbock Texas

Quote:

Originally Posted by Ironcross

. . . ALWAYS set the plugs at .035. not 040, not 060 nor 080. for PERFORMANCE it`s .035.

Does it make any difference if its an HEI distributor? The previous owner of my '73 had installed an HEI distributor and had the plugs gapped at 0.040. I increased the gap to 0.045 and could tell the difference (better at 0.045). I didn't try going the other way though.

DC

Jun 20, 2008 | 11:41 PM

#24

Ironcross

Race Director

Joined: Nov 2002

Posts: 12,142

Likes: 54

From: Taylor Michigan

Points or electronic, {that logically includes HEI} it dont make any difference. Performance engines run best at .035 plug gap.

Spark plugs have a unique fearure in a engine. In the absence of fancy electronics a spark plug will be able to tell how a engine is performing on every cylinder. Because its right in the combustion chamber and by reading the plugs you know how the engine is performing. A easy to learn valuable skill.

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