Spark plug gap?

black88 · February 10th, 2008, 10:49 AM

I have a 306 with edelbrock performer heads what should i gap my plugs at? Also i pulled one of my plugs and it looks kinda white what does that mean to rich or to lean?

ujslost · February 10th, 2008, 12:47 PM

to white means lean
black or suity is rich
should just have a touch of brown look to it if mixture is right.

TurboLX · February 10th, 2008, 12:49 PM

white is sometimes a bad head gasket to

ujslost · February 10th, 2008, 12:50 PM

true, if head gasket is suspected, do compression test and leakdown.

kuskye25 · February 10th, 2008, 02:12 PM

what gap are the ones in your car at, i gap at .054 but im all stock. anyway if yours are less then that you can open it up some more and thatll help richen it some to

Fastan · February 10th, 2008, 03:42 PM

The spark plug gap should be about .045" for a stock or mildly tuned normally aspirated street application.

black88 · February 10th, 2008, 05:22 PM

34 is stock right?

kuskye25 · February 10th, 2008, 06:52 PM

k my manual and ford says gap from .052 to .054 for stock applications

Stangzilla · February 10th, 2008, 11:56 PM

Originally Posted by black88

I have a 306 with edelbrock performer heads what should i gap my plugs at? Also i pulled one of my plugs and it looks kinda white what does that mean to rich or to lean?

A perfect running engines plugs should be a nice chocolate brown color.

ryans88gt · February 11th, 2008, 01:05 AM

EFI motor plugs alway look white if you pull them after you putted around town or after the car has been idling.

They run like 15:1 at idle, which = white plug.

If you want to know what your car is doing at WOT, do a WOT pass, kill the engine, and check the plugs directly after the pass. Not after the return road, but immediately after the WOT pass.

February 10th, 2008, 10:49 AM	#1
black88 Regular 1988 Mustang GT Hatch Join Date: Sep 2007 Location: Queens,NY Posts: 133 iTrader: 0 reviews	Spark plug gap? I have a 306 with edelbrock performer heads what should i gap my plugs at? Also i pulled one of my plugs and it looks kinda white what does that mean to rich or to lean?

February 10th, 2008, 12:47 PM	#2
ujslost MM Fanatic Join Date: Mar 2007 Location: Albertville, AL Posts: 3,920 Blog Entries: 1 iTrader: 1 reviews	to white means lean black or suity is rich should just have a touch of brown look to it if mixture is right. __________________ 1986 Mustang GT t-top time piece!

February 10th, 2008, 12:49 PM	#3
TurboLX I Post Entirely Way Too Much 1988 Mustang LX Turbo Join Date: Oct 2006 Location: NY Posts: 8,792 Blog Entries: 1 iTrader: 0 reviews	white is sometimes a bad head gasket to __________________ 1988 LX Coupe 2.5L, GT35R, 44mm WG, 32psi, C16.

February 10th, 2008, 12:50 PM	#4
ujslost MM Fanatic Join Date: Mar 2007 Location: Albertville, AL Posts: 3,920 Blog Entries: 1 iTrader: 1 reviews	true, if head gasket is suspected, do compression test and leakdown. __________________ 1986 Mustang GT t-top time piece!

February 10th, 2008, 02:12 PM	#5
kuskye25 Regular Join Date: Dec 2007 Posts: 371 iTrader: 0 reviews	what gap are the ones in your car at, i gap at .054 but im all stock. anyway if yours are less then that you can open it up some more and thatll help richen it some to __________________ '88 Mustang GT, Long Tube Headers, Off Road H-pipe, Flowmasters w/turn downs, K&N, Under Drive Pullies, Smog delete/Ac eliminator/72" belt, Subframe connectors, 3.73 Gears '93 LX 4-banger 78k miles

February 10th, 2008, 03:42 PM	#6
Fastan Newbie Join Date: Sep 2007 Posts: 13 iTrader: 0 reviews	The spark plug gap should be about .045" for a stock or mildly tuned normally aspirated street application.

February 10th, 2008, 05:22 PM	#7
black88 Regular 1988 Mustang GT Hatch Join Date: Sep 2007 Location: Queens,NY Posts: 133 iTrader: 0 reviews	34 is stock right?

February 10th, 2008, 06:52 PM	#8
kuskye25 Regular Join Date: Dec 2007 Posts: 371 iTrader: 0 reviews	k my manual and ford says gap from .052 to .054 for stock applications __________________ '88 Mustang GT, Long Tube Headers, Off Road H-pipe, Flowmasters w/turn downs, K&N, Under Drive Pullies, Smog delete/Ac eliminator/72" belt, Subframe connectors, 3.73 Gears '93 LX 4-banger 78k miles

February 11th, 2008, 01:05 AM	#10
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,627 iTrader: 0 reviews	EFI motor plugs alway look white if you pull them after you putted around town or after the car has been idling. They run like 15:1 at idle, which = white plug. If you want to know what your car is doing at WOT, do a WOT pass, kill the engine, and check the plugs directly after the pass. Not after the return road, but immediately after the WOT pass. __________________ 88 GT CHI headed 351w 10.8 @ 125 - still figuring it out. 03 Cobra 2.3 whipple 10.7 @ 129 - sold it 04 Mach 1 12.7 @ 109 mostly stock - sold it 89 LX procharged 302 515 hp 497 ftlbs 10.7 @130 mph - sold it

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