Spark Plug Modifications

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Jul 12, 2005 | 03:37 PM

katman

Thread Starter

Junior Member

Joined: May 2003

Posts: 90

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From: Overland Park in the Great State of KANSAS

Car: 91 Z28

Engine: 468 ci

Transmission: thm 350

Spark Plug Modifications

I've heard of people cutting the ground electrode off at the edge of the center electrode as opposed to going across the center electrode. Any comments good or bad? I've got a 79 Z28 359ci about 10.5:1, runs mid 12s. MSD Digital 6+, MSD billet distributor, MSD HVC II coil, MSD wires, Accel plugs .035. Normally Aspirated now going to install Nitrous Express 2 stage plate soon. Would this mod help? Should I increase the gap to say .045?

Jul 13, 2005 | 12:10 PM

rgarcia63

Supreme Member

Joined: Jan 2003

Posts: 2,133

Likes: 4

From: Houston, Texas

Car: 88' IROCZ

Engine: 388 TPI Motown 350 Race block

Transmission: 700R4

Axle/Gears: 2.77

Re: Spark Plug Modifications

Quote:

Originally posted by katman
I've heard of people cutting the ground electrode off at the edge of the center electrode as opposed to going across the center electrode. Any comments good or bad? I've got a 79 Z28 359ci about 10.5:1, runs mid 12s. MSD Digital 6+, MSD billet distributor, MSD HVC II coil, MSD wires, Accel plugs .035. Normally Aspirated now going to install Nitrous Express 2 stage plate soon. Would this mod help? Should I increase the gap to say .045?

Cutting the ground strap back is good for performance.
Nitrous may blow the spark out if you go with too wide a gap, and you shouldn't gap a plug more than .008", .o45" is proabably OK.

.035"+.008=.043"

Last edited by rgarcia63; Jul 14, 2005 at 07:35 AM.

Jul 13, 2005 | 05:20 PM

sixpackmtrspts

Member

Joined: Jul 2005

Posts: 235

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From: upland, ca

since your gonna be playing with nitrous, get alot of plugs lol.

i have done this to my plugs for years adn have never had any issues but i dont use nitrous.