spark plugs for aluminum gt40S

ksuper2 · August 23rd, 2009, 12:51 PM

what plugs should i be using? autolite 764? i believe that is what goes in the iron gt40's. is it the same for aluminum gt40 heads?

thanks ken

nolife · August 23rd, 2009, 04:26 PM

Do you mean the aluminum GT40X? If so, Motorcraft AGSF-32C. I don't know the Autolite part for that.

ryans88gt · August 23rd, 2009, 04:30 PM

I think he just meant gt40 plural.

Anyway, the answer is no the aluminum heads dont use the same plugs as the iron heads.

you'll want something along the lines of a 3925,3924, or 3923 depending on the required heat range.

ReverendDexter · August 23rd, 2009, 04:33 PM

Just remember to ALWAYS use anti-seize when putting plugs in an aluminum head.

superbean · August 23rd, 2009, 11:01 PM

Autolite 764 is used in a GT40p Iron head

August 23rd, 2009, 12:51 PM	#1
ksuper2 Newbie Join Date: May 2009 Posts: 5 iTrader: 0 reviews	spark plugs for aluminum gt40S what plugs should i be using? autolite 764? i believe that is what goes in the iron gt40's. is it the same for aluminum gt40 heads? thanks ken

August 23rd, 2009, 04:26 PM	#2
nolife MM Fanatic 91GT, 88GT, 02GT Join Date: Dec 2006 Posts: 3,057 Blog Entries: 3 iTrader: 0 reviews	Do you mean the aluminum GT40X? If so, Motorcraft AGSF-32C. I don't know the Autolite part for that. __________________ Last edited by nolife; August 23rd, 2009 at 04:30 PM.

August 23rd, 2009, 04:30 PM	#3
ryans88gt MM Fanatic Join Date: May 2007 Location: Bloomington, IL Posts: 4,737 iTrader: 0 reviews	I think he just meant gt40 plural. Anyway, the answer is no the aluminum heads dont use the same plugs as the iron heads. you'll want something along the lines of a 3925,3924, or 3923 depending on the required heat range. __________________ 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

August 23rd, 2009, 04:33 PM	#4
ReverendDexter Priest of the Car Gods Clapped-out '90 GT 'vert ~5.5 seconds off TTOD :( Join Date: Jan 2007 Location: Rohnert Park, CA Posts: 13,808 iTrader: 0 reviews	Just remember to ALWAYS use anti-seize when putting plugs in an aluminum head. __________________ O o /¯/______________________ \|BLAAAAAAAAAAAAAAAAAAAAAAAAARGH!!! \_\

August 23rd, 2009, 11:01 PM	#5
superbean Hardcore Enthusiast 1998 Cobra 13.24@105.66 Join Date: Aug 2008 Location: North Carolina Posts: 1,778 iTrader: 0 reviews	Autolite 764 is used in a GT40p Iron head __________________ weeee foooord!

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