Thickness of spark plug leads

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Jan 18, 2004 | 05:05 AM

SHADO

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Thickness of spark plug leads

Hey guys, i went to the auto shop 2day to get new spark plug leads, i wanted to get 8.5mm or 9mm for higher performance, but the guy that worked there told me that these days every1 is usin thinner leads cos they disperse the heat a lot quicker and they have the same performance as thicker leads. Is this true?

Jan 18, 2004 | 05:06 AM

SHADO

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By thinner i mean like 4-5mm

Jan 18, 2004 | 04:23 PM

Kevin M

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Joined: Nov 2002

Posts: 18,369

From: Reno, NV

Car Info: 1993/2000/2001 GF4 mostly red

No, thicker is better. By insulating the wire better, it doesn't get as hot, and has less resistance, which leads to better spark. That's why Magnecors and the like are so big. Bigger is better in this case.