Spark plugs

[Kens svo]

Having problems locating the AWSF32C Motorcraft spark plugs. I have called all the local part stores and they are trying to sell me SP-447's ( AGSF32C). I also looked online and they are also referencing back to the SP-447. Will they work? I'm not in desperate need, but would like to keep an extra set on hand.

[svono50]

Personally I haven't used Motorcraft plugs in many moons, so no direct answer to your question. I will say that I have been very pleased with Autolite 764 plugs, can't beat the ~$1/plug cost at Wally World either. It would be good to know if the SP's are a good alternative to the 'old' AWSF's.

[SVOeric]

umm IF I remember my naming conventions correctly the SP is a PLATINUM plug --- I don't know of anyone in the SVO community that has run a a platinum plug with good success.

Will it work? Probably.. will you have strange hiccups and occasional detonation? PROBABLY

so I hit one of the on-line retailers that has a good selection...
this lists plugs, by composition, copper first, then platinum, then irridium. I have no idea how irridium plugs will run...

prices and info as oc 12/24.2015

CHAMPION RS14LC Copper Plus Info	Resistor Copper Plug; w/ 1 BBL [Wholesaler Closeout -- 30 Day Warranty] (Only 1 Remaining)		$0.49
ACDELCO R44NTSE Professional; Conventional	Gap .034	+ Sold in packs of {x}; Price reflects cost of each individual item, not the pack	$0.72
SPLITFIRE CC254E Info	COPPER CLASSIC - OE STYLE [Wholesaler Closeout -- 30 Day Warranty]	MIGHTY WRF44 Info	$0.77
MIGHTY WRF44	Resistor Spark Plug; w/o FUEL INJ [Wholesaler Closeout -- 30 Day Warranty]		$0.83
MOTORCRAFT AWSF44CF4 {#S7Z10346BCRM} Copper Info	COPPER; LX [Wholesaler Closeout -- 30 Day Warranty] (Only 3 Remaining)		$1.03
AUTOLITE 764 {#764BP, 764DP2} Copper Resistor Spark Plug Info One of our most popular parts	.034 Gap; OE half thread design replaced by full thread design; OE Style		$1.10
DENSO 5032 {#T20EPRU} Copper	Gap .032		$1.33
CHAMPION 401 {#RS12YC} Copper Plus Info	Gap .036; OE Type		$1.34
NGK 2238 {#2223, BPR5EFS, TR5} Standard; V-Power Info One of our most popular parts	.034 GAP		$1.49
MOTORCRAFT SP447 {#AGSF32C, AGSF32CF6} Standard Info One of our most popular parts	Plug Material: Copper; Gap: .034		$1.56
SPLITFIRE SF514D Info	SPLIT V ELECTRODE LX [Wholesaler Closeout -- 30 Day Warranty]		$1.92
MOTORCRAFT SP493 {Click Info Button for Alternate/OEM Part Numbers} Platinum-Nickel Plated Shell; Platinum Spark Plug Info	Plug Material: Platinum; Gap: .034		$2.45
E3 SPARK PLUGS E360	LX [Wholesaler Closeout -- 30 Day Warranty]		$3.52
Platinum (platinum on center electrode for longer life than copper & less risk of misfire damaging catalytic converter)	MIGHTY WRF44P Info w/o FUEL INJ [Wholesaler Closeout -- 30 Day Warranty] (Only 7 Remaining)		$1.03
SPLITFIRE PP076D Info	Platinum Plug; PLATINUM CLASSIC - OE STYLE [Wholesaler Closeout -- 30 Day Warranty]		$1.28
AUTOLITE AP104 {#AP104DP2} Platinum Spark Plug Info One of our most popular parts	.034 GAP		$1.93
CHAMPION 3408 {#RS10PYC} Platinum Power (Rebate/Promotion Available!)	GAP .036		$2.06
DENSO 4512 {#PT20TT} Platinum TT Info	Gap 0.040; Twin-Tip Technology Design with Platinum Center Electrode and Titanium Enhanced Ground Strap		$2.22
NGK 3186 {#TR5GP} G-Power Info One of our most popular parts	.034 GAP		$2.32
AUTOLITE AP764 Platinum Info	Gap: .034 (Only 5 Remaining)		$2.50
BOSCH 6701 OE Fine Wire Platinum Info	Do Not Gap, Gap is Preset	No idea what this means	$2.51
ACDELCO 12 Professional; Rapidfire (Rebate/Promotion Available!)	Double Platinum (platinum on center and ground electrodes to extend performance life and durability)	Gap .032	$3.02
AUTOLITE APP104 {#APP104DP2} Double Platinum Spark Plug Info One of our most popular parts	.034 Gap; Replaces APP764		$3.45
AUTOLITE APP764 Info	.034 Gap; Double Platinum (Only 1 Remaining)		$3.65
CHAMPION 7401 {#RS10PYPB5, RS12PYP} Double Platinum (Rebate/Promotion Available!)	GAP .036		$3.99
BOSCH 8103 OE Fine Wire Double Platinum Info	Do Not Gap, Gap is Preset; OE is copper		$4.26
ACDELCO 41810 Professional; Double Platinum (Rebate/Promotion Available!)	Iridium (higher melting point, conductivity & strength than platinum for maximum durability and lifespan)	GAP .034	$4.96
AUTOLITE XP104 {#XP104DP2} Iridium Spark Plug Info One of our most popular parts	.034 GAP		$4.40
BOSCH 9606 OE Fine Wire Iridium Info	Do Not Gap, Gap is Preset		$4.84
CHAMPION 9204 {#RS12WYPB4} CHAMPION IRIDIUM (Rebate/Promotion Available!)	GAP .036		$4.86
DENSO 4714 Iridium TT (Rebate/Promotion Available!)	Gap 0.040; Ultimate Endurance and Power, 0.4mm Iridium and 0.7mm Platinum Twin-Tip Technology		$5.52
DENSO 5326 {#IT20} Iridium Plug; Iridium Power Info	Gap 0.044; Performance Upgrade with World's Smallest Center Electrode		$5.71
NGK 7397 {Click Info Button for Alternate/OEM Part Numbers} Iridium IX Info One of our most popular parts	.034 GAP		$6.04
NGK 97287 Laser Iridium Info	.034 GAP		$9.05

[svono50]

I know platinum plugs and our ignition systems don't get along, mainly due to the required energy required to jump the spark gap when boost goes up. The copper plugs have a lower internal resistance and our ignition system can handle the requirements. I know the Iridium plugs are pretty standard on today's vehicles since they last a long, long time without the wear of the copper or even platinum plugs. I don't, however, have any knowledge if they pose any issues with our boosted motors. Maybe someone on here has tried them and can chime in. For the cost of a set or two of plugs a season (i.e.- $4-$8), I have been very pleased with the performance of my 'old school' copper plugs. YMMV

[jimtash9]

Autolite 764's gapped up to .036 has given me the most power and best running engine.

[svono50]

Resurrecting this, since as with cars our age, the market sometimes changes.

I have been running Autolite 764's for probably 10+ years now and loved you could get a 2-pack for ~$2. My local Wally world no longer carries plugs, so decided to shop around and found that the 764's are a very, very hard find and now list for ~$4 each...huh, a 400% increase?!? I checked Autolite's site and they also list their 104 copper plug for our application. Looking at the specs, it is the same, except that it has 'full' threads vs 'partial' threads, but all other things being the same. So at $1.43 each from Rock Auto, I figured it was worth a shot as I was ordering other stuff too.

I just swapped in a set and have yet to fire my SVO up, but from the looks of things, I think this one should be just fine as a replacement for the old trusty 764's. Below are some pics of a 764 I pulled out and a new 104. I would have to say they are not 'perfectly' the same, but sure are mechanically matched. I can't see any detriment of the full threads, but time will tell. I will check back in when I get a few miles on them. Just wanted to pass this info along.

Spark Plug - Autolite_Comparison_764-104_01.jpg Spark Plug - Autolite_Comparison_764-104_02.jpg Spark Plug - Autolite_Comparison_764-104_03.jpg

[MIKESVO]

Ted - 4 pack on ebay are 10 bucks with free shipping. See how the 104 works out. If you need to go back, there is an option. Mike

[svono50]

I know of the Ebay option, just would rather get them from a known retailer/wholesaler...not that I am not known for getting various automotive items from questionable Ebay sellers. I am guessing the market for the 764's is starting to get thin, so mainstream retailers are no longer carrying the 'slow moving' items. I almost feel like I am searching for old lawnmower spark plugs back in the early 80's (ha,ha!).

[MIKESVO]

Yep, I think they work in my twin Kohler too.

[SVOeric]

lol I got a 24 hp twin kohler too!! I can order the 6-packs!