Spark plug gap
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Joined: Apr 2005
Posts: 490
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From: Hamilton ON Canada
Car: 87 GTA t-top
Engine: L98 350 w/RMT
Transmission: 700R4
Axle/Gears: 9 bolt BW 3.45
Spark plug gap
Just wondering for all who have turbo/ supercharged their TA's with v8 if they needed to close the gap on spark plugs or just leave it.
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Joined: Jul 1999
Posts: 1,773
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From: Panama City FL
Car: 87 Iroc
Engine: Turbocharged 5.7 Pro-Fl-XT
Transmission: 700R4 for moment
Axle/Gears: 3.25 9 inch
Re: Spark plug gap
At 30 thousanths, my stock TPI worked fine to around 6-7 psi. Beyond that it would break up. That was with stock style 7mm wires. I have a MSD 6AL now but still running 30 thou and 7mm wires. No sign of breaking up to 16 psi so far 
From my research though, it is better bet to run a larger gap than a smaller so long as the ignition system will handle it.
From my research though, it is better bet to run a larger gap than a smaller so long as the ignition system will handle it.
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