90' L98 supercharged - which spark plug???

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Jul 24, 2010 | 07:06 AM

supercharged90tpi

Thread Starter

Cruising

Joined: Jun 2009

Posts: 12

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90' L98 supercharged - which spark plug???

Hi all,

I have a 1990 C4 tpi with a supercharger paxton,
about 320hp, i'd like to put the best plug on it,
but i dont know which of them ????

Thanks
Ben

Jul 24, 2010 | 07:23 AM

PAINTER MAN

Burning Brakes

Joined: May 2004

Posts: 1,230

Likes: 27

From: Athens Ohio

I am sure a lot of people will disagree with me on my choice of plugs. I have a supercharged 86. I am running the same cheep NGK plugs that I had in the car before adding the supercharger. The install instructions recommended going to the next colder plug. I decided to see how it ran first. I have never had any problems.

Jul 24, 2010 | 08:25 AM

supercharged90tpi

Thread Starter

Cruising

Joined: Jun 2009

Posts: 12

Likes: 0

Quote:

Originally Posted by PAINTER MAN

thanks for answer,
did you have the part number or the reference?

thanks
Ben

Jul 24, 2010 | 12:03 PM

tequilaboy

Melting Slicks

Joined: Aug 2003

Posts: 3,401

Likes: 397

From: Lakeville MI

I like the Autolite 3923.

Cheap, readily available, copper core, no issues with fouling.

I'd also consider the AR3923 with nickel plating and cut back electrode.

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