WyldeSoul
Joined:
Feb 2007
Fort Wayne, IN
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Just picked up some motorcraft plugs from the local dealer, and they said that they were gapped properly.
The thing is, it looks like there's less than a 1mm gap on them. I know the turbo cars need a small gap, but shouldn't it be a bit bigger than that? I can't even fit my gap checker in there to see what the gap is.
The Wench 1987 Turbocoupe. 5 speed. Black with Raven/Charcoal interior. Beater.
Mods: Cone filter, manual 2 stage boost controller (Gillis style), Thrush Glasspack (Pre-axle dump.)
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Joe F
Joined:
Jul 2002
Hawkins, Texas - USA
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IIRC the recommended gap is 0.032"; if you're running a lot of boost you may want to reduce it to prevent spark blow-out.
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WyldeSoul
Joined:
Feb 2007
Fort Wayne, IN
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Righto, thanks.
The Wench 1987 Turbocoupe. 5 speed. Black with Raven/Charcoal interior. Beater.
Mods: Cone filter, manual 2 stage boost controller (Gillis style), Thrush Glasspack (Pre-axle dump.)
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Dan S
Joined:
Jan 2003
Harrisburg, PA
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Local dealer must be smoking something illegal or just pulled the answer from a convenient location :eek: ! I'm not at home, so I can't look up the spec, but I would not go beyond .035 on the high side or .025 on the low side depending on psi settings for your turbo or your type of ignition coil.
Too much gap with higher psi could blow out the fire!
(Sorry for the delay, I got tied up in a meeting and the reply sat on my computer. I see Brother Joe Cool gave you some good info).
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Pete D
Joined:
Apr 2001
Northern OH
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I have never see an Autolite 764 copper come out of the box at less than 0.045"
Pete Dunham
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Robert Camp
Joined:
Jan 2006
Raleigh, NC
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And boost cannot "blow" out the spark! The increase in pressure results in a higher impedance across the gap. The voltage is not enough to ionize the mixture. If the secondary voltage could be increased it would spark.
Robert Camp
'86 Medium Regatta Blue TC, 5-speed, original owner.
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Dan S
Joined:
Jan 2003
Harrisburg, PA
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Quote:Originally posted by Robert Camp:
And boost cannot "blow" out the spark! The increase in pressure results in a higher impedance across the gap. The voltage is not enough to ionize the mixture. If the secondary voltage could be increased it would spark.
Merely a figure of speech!
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