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Author
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Topic: spark plug recommendation?
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MrWesson22
Gearhead Posts: 1286
From: Dacula, GA
Registered: Sep 2000
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posted 03-06-2002 10:05 PM
   
Could you recommend a spark plug for a street/strip 351C 4V running 10.8:1?------------------
Neal
Member #723
[email protected] AIM: MrWesson22 69 Gulfstream Aqua Grande
351C/Toploader 4sp
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Hemikiller
Gearhead Posts: 667
From: Killingworth, CT
Registered: Feb 2002
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posted 03-06-2002 10:53 PM
Autolite 23, 24 or 25, depending on what your engine prefers. Trial and error. 25 is hotter, 23 is colder.
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MrWesson22
Gearhead Posts: 1286
From: Dacula, GA
Registered: Sep 2000
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posted 03-07-2002 10:39 PM
thanks. anyone else??
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Neal
Member #723
[email protected] AIM: MrWesson22 69 Gulfstream Aqua Grande
351C/Toploader 4sp
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kid vishus
Gearhead Posts: 6590
From: middle of NC
Registered: Oct 2000
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posted 03-07-2002 10:51 PM
I like NGKs, a -6 is what I wouwd put in it. If thats too hot, a -7 is one colder, but its a fairly cold plug for a street car. (I run -8's in my racecar)
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Dave_C
Gearhead Posts: 1069
From: Gadsden, Al
Registered: Aug 99
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posted 03-07-2002 11:04 PM
I don't know how well they would work in a street car, but I really like the Autolite AR25 racing plug. Similar to the regular Autolite 25, but has a back-cut center electrode and a nickel plated body. It was worth .05-.06 over the regular Autolite. Not much, but at $1.69 each (overnite order at Advance Auto chain) they are worth it.Later, David Cole
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Moneymaker
Administrator Posts: 27499
From: Lyons, IL, USA
Registered: May 99
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posted 03-07-2002 11:52 PM
Well let's see now, you can get eight of us to give you eight different recomendations and them you could have eight different plugs in the engine.  Wouldn't that be cool? 
ASF-32 Motorcraft------------------
Alex Denysenko
Co-Administrator and Moderator/ non 65-66 Mustang owner sensitivity co-ordinator NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00, '01, & '02
Fleet of FoMoCo products including 88 ASC McLaren Mustang #28
Part time secret agent license #0089
US Class Nationals link
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1trickpony
Gearhead Posts: 107
From: Escondido, Ca
Registered: Oct 2001
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posted 03-08-2002 02:32 AM
I'm actually a Bosch Platinum kinda guy.
Love those plugs.
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1969 "S" code Mach1
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MrWesson22
Gearhead Posts: 1286
From: Dacula, GA
Registered: Sep 2000
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posted 03-09-2002 01:10 PM
I really appreciate it. Yeah, imagine that - people liking different brands. The world would be so much better if we all had the exact same taste (my taste of course) and drove the exact same car.
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Neal
Member #723
[email protected] AIM: MrWesson22 69 Gulfstream Aqua Grande
351C/Toploader 4sp
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Mpcoluv
Gearhead Posts: 1341
From: Charlotte NC usa
Registered: Apr 2001
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posted 03-10-2002 09:22 AM
quote:
Originally posted by Moneymaker:
Well let's see now, you can get eight of us to give you eight different recomendations and them you could have eight different plugs in the engine. Wouldn't that be cool?
ASF-32 Motorcraft
Alex, I am currently running a autolite #25... Is the ASF-32 a hotter plug?
I really could use a hotter plug...any reccomendation for a 10.4:1 372C which runs reformulated gas in heavy traffic/idling in the driveway?
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MrWesson22
Gearhead Posts: 1286
From: Dacula, GA
Registered: Sep 2000
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posted 03-11-2002 05:25 PM
I bought the asf-32. I'm using a full msd ignition on the car - what should I gap these at? Thanks!
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Neal
Member #723
[email protected] AIM: MrWesson22 69 Gulfstream Aqua Grande
351C/Toploader 4sp
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SteveLaRiviere
Administrator Posts: 45869
From: Saco, Maine
Registered: May 99
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posted 03-11-2002 05:26 PM
.035"  ------------------
'70 Mustang Mach 1 M code 351C 4V/FMX/3.25 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
MCA Member # 47773
Always borrow money from a pessimist, they don't expect it back.
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steve'66
Gearhead Posts: 9533
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 03-11-2002 05:54 PM
quote:
Originally posted by MrWesson22:
Could you recommend a spark plug for a street/strip 351C 4V running 10.8:1?
YES, spark plugs are good 
SteveW
[This message has been edited by steve'66 (edited 03-11-2002).]
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70coupe
Gearhead Posts: 483
From: Toronto,Ontario,Canada
Registered: Aug 2000
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posted 03-11-2002 07:17 PM
ASF42C!!
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7DMACH1
Gearhead Posts: 2718
From: PHILA. PA.
Registered: Feb 2001
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posted 03-11-2002 08:06 PM
AUTOLITE 25 = MOTORCRAFT ASF-42C HOTTEST
" 24 = " ASF-32C COLDER
" 23 = " ASF-22C COLDEST
R A Y ------------------
THE CAPRI IS FOR SALE IN THE CLASSIFIED SECTION RAY . 70 MACH 1 351C NOW 408 STROKER 4SPD.
86 MERCURY CAPRI 5.0 RUNS 12.86 @107 1.65 60 ft.
2001 LINCOLN LS V8 1997 MUSTANG
http://www.geocities.com/slariviere/7DMach1.html
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Mpcoluv
Gearhead Posts: 1341
From: Charlotte NC usa
Registered: Apr 2001
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posted 03-12-2002 11:16 AM
Is an ASF-52 1 step hotter than an ASF-42?
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7DMACH1
Gearhead Posts: 2718
From: PHILA. PA.
Registered: Feb 2001
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posted 03-12-2002 12:06 PM
YES. But I don't think I'd want to use it. The std plug is a 42 a 52 is pretty hot. RAY------------------
THE CAPRI IS FOR SALE IN THE CLASSIFIED SECTION RAY . 70 MACH 1 351C NOW 408 STROKER 4SPD.
86 MERCURY CAPRI 5.0 RUNS 12.86 @107 1.65 60 ft.
2001 LINCOLN LS V8 1997 MUSTANG
http://www.geocities.com/slariviere/7DMach1.html
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