Spark plug gap |
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colonelsandersman
Member Joined: 26-August-2011 Location: Clear Lake MN Status: Offline Points: 64 |
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Posted: 22-April-2013 at 5:46AM |
I have a 1973 Gran Torino with a 351w. I pulled the engine to change gaskets and upon inspection noticed the casting is dated 1974, the chiton manual says for 1973 plug gap at .34 but for 1974 .44. I figured the plug gap was simply increased for emissions so I reinstalled the plugs with .34 gap, I figure the hotter burn is worth the 2hp lost form 73 to 74. Is there an advantage or disadvantage to doing this. What does this actually do for my engine?
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Jake
1973 Gran Torino |
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Robbdtme
Senior Member Joined: 06-June-2012 Location: Central WI Status: Offline Points: 765 |
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I think that was the difference between points and electronic ignition systems. Thinking the electronic version has a higher voltage thus using a wider plug gap for a larger spark. Nothing to do with emissions.
Edited by Robbdtme - 22-April-2013 at 6:57AM |
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Johnny cash Special 74-75-76 freak. 77 XR7. 78 LTD II sport looks pretty but poop 302 in it.
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robot9000
Senior Member Joined: 02-September-2011 Location: Michigan Status: Offline Points: 505 |
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Bigger gap = larger spark, but is hard to pull off with points and condenser. If you run electronic ignition, I think you can run a bigger gap.
I just changed my plugs on my 351w with Autolite's and I gaped them to .36 (from memory here at work, might be .36...). Def not in the .40's. I got plain old Points.
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1973 Gran Torino Sport
2010 Mazda 6 2007 Jeep Wrangler 2011 Damon Daybreak 35BD |
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