Plug gap

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05-26-2006, 10:38 PM

FoxGT

5th Gear Member

Thread Starter

Join Date: Jul 2003

Location: United States

Posts: 3,451

Plug gap

Anyone got any advise on what I should gap my plugs to? '89 GT. & the only engine parts that should matter I think are the major engine parts i have on. (explorer intake, x303 cam, full mac exhaust)

Any suggestions? they are at .046 now

05-26-2006, 11:04 PM

sc94gt

3rd Gear Member

Join Date: Jul 2004

Location:

Posts: 501

RE: Plug gap

I have mine gapped at .45
That seems to work well for me.
I also went with one plug colder because the motor is boosted and I drive highway mostly.

05-26-2006, 11:05 PM

elusive1

1st Gear Member

Join Date: Nov 2005

Location: CA

Posts: 120

RE: Plug gap

i have mine gapped at .50

i'm pretty sure that's what the service manual reccomends...

05-26-2006, 11:17 PM

Mustangn

1st Gear Member

Join Date: Apr 2006

Posts: 101

RE: Plug gap

Look under the hood mine saids .042-.046. I have a 91 GT Stock

05-26-2006, 11:57 PM

FoxGT

5th Gear Member

Thread Starter

Join Date: Jul 2003

Location: United States

Posts: 3,451

RE: Plug gap

but my car isn't stock. I don't expect the intake or exhaust to change what the gap should be, i do however expect the cam to.

05-28-2006, 01:06 AM

5.0_faithful

2nd Gear Member

Join Date: Feb 2006

Location: the country

Posts: 280

RE: Plug gap

Chiltons says stock is .054".

05-28-2006, 02:33 AM

Grimace5.0

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Join Date: Sep 2004

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Posts: 1,130

RE: Plug gap

Whatever they come out of the box gapped at. Just go over each and make sure they are all relatively close. Technicly, between .042 and .054. Plug gap isn't as critical as some folk think it is, plus you run the risk of F' ing up the plug or ground strap.