Gapping HT0 plugs 2005 Mustang GT - Ford Mustang Forum
 
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post #1 of 13 (permalink) Old 04-22-2010 Thread Starter
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Gapping HT0 plugs 2005 Mustang GT

Guys, trying to tight gap my new AutoLite HT0 plugs to .026-.028... Does anybody have a best practice for how to do this? Seems like it's going to be a chore...

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post #2 of 13 (permalink) Old 04-22-2010
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Easiest method is to use the gapping tool made for these plugs available by either MMR or Steeda. Or you can use a 9/16" spark plug socket, 3/32" punch and hammer with your feeler gauges.

Either way you must be running a lot of boost for that narrow of a gap...


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post #3 of 13 (permalink) Old 04-22-2010
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Not that it was the correct way to do it but I tapped mine against a piece of wood and than used feeler gauges. Came out just fine @ .032

Way too much to list. I'm broke because of it. Tuned by Blue Collar Performance.
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post #4 of 13 (permalink) Old 04-22-2010
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What kind of boost are you running to need that tight of a gap?

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post #5 of 13 (permalink) Old 04-22-2010
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Quote:
Originally Posted by BLEWBIU View Post
Not that it was the correct way to do it but I tapped mine against a piece of wood and than used feeler gauges. Came out just fine @ .032
Good way to crack the insulator!

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post #6 of 13 (permalink) Old 04-22-2010
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i wonder if you could use a brake flaring tool ....... :smoke:

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post #7 of 13 (permalink) Old 04-22-2010
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Thank god I didn't, no issues anyhow...

Way too much to list. I'm broke because of it. Tuned by Blue Collar Performance.
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post #8 of 13 (permalink) Old 04-22-2010
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post #9 of 13 (permalink) Old 04-23-2010
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Quote:
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What kind of boost are you running to need that tight of a gap?
By his signature it looks like none.

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post #10 of 13 (permalink) Old 04-25-2010 Thread Starter
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10 psi, is that too tight??
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Yes, I ran .028 at 15.8 lbs and now run .032 at 12.4 lbs. Maybe try .035?

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Agree... Somewhere between .032 and .035. Start high and work down. Run the biggest gap you can without suffering spark blowout.

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I've found at 10 psi running .032 or .030 is the best. When I swapped my plugs (and found out they were gapped in the most ghetto ass way) we figured out some of them were blowing out because the gap was almost .040 on some of them.
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