What spark plugs are you using in your LT1 383 strokers? [Forums - C4 Technical]

C4 Technical > What spark plugs are you using in your LT1 383 strokers?
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biggrizzly	What spark plugs are you using in your LT1 383 strokers?	#1
2011 Memorial Day Car Show Winner! Chesapeake Beach, Maryland 4543 Posts Member since: 2006/4/23 0:00	My engine came home without plugs and I was wondering what plugs you guys are using in your LT1 383 stroker motors? I have a brand new set of Autolite Platinum plugs (AP106) on the shelf from the previous build that I never used for some reason.
	Posted on: 2011/4/7 2:01
	_________________ Don Haller Corvette Club of America 94Coupe, 383Stroka, PeteK Trans, 3000stall, 3.54rear, Konis and bigger sways.
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pr0zac	Re: What spark plugs are you using in your LT1 383 strokers?	#2
Elite Guru Pittsburgh 1045 Posts Member since: 2008/10/20 23:28	i am using autolite 103's
	Posted on: 2011/4/7 6:00
	_________________ 96 lt4. 357ci, 11:1, LE 226/232, LE2 LT4 heads, ported LT4 intake, EM Gladiator44, EM LT's, stock exhaust, NX kit.
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Steve40th	Re: What spark plugs are you using in your LT1 383 strokers?	#3
Elite Guru 1114 Posts Member since: 2005/12/20 0:00	NGK TR55 part number 3951 I believe.
	Posted on: 2011/4/7 6:10
	_________________ Ko'u ohana aia ku'a ikaika
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bogus	Re: What spark plugs are you using in your LT1 383 strokers?	#4
Grand Imperial Pooh-Bah San Pedro, CA 20859 Posts Member since: 2005/9/7 0:00	I am a huge fan of NGK.
	Posted on: 2011/4/7 6:40
	_________________ The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me
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biggrizzly	Re: What spark plugs are you using in your LT1 383 strokers?	#5
2011 Memorial Day Car Show Winner! Chesapeake Beach, Maryland 4543 Posts Member since: 2006/4/23 0:00	Josh, Autolite 103 is heat range 3. So Autolite must go colder the smaller the numbers. Some mfgs go the other way with higher numbers being colder. I suspect yours are doing well? I guess my 106s are too hot. Probably why I didn't use them before. I hate getting old and forgetting why I did or didn't do something two years ago!
	Posted on: 2011/4/7 10:38
	_________________ Don Haller Corvette Club of America 94Coupe, 383Stroka, PeteK Trans, 3000stall, 3.54rear, Konis and bigger sways.
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biggrizzly	Re: What spark plugs are you using in your LT1 383 strokers?	#6
2011 Memorial Day Car Show Winner! Chesapeake Beach, Maryland 4543 Posts Member since: 2006/4/23 0:00	Quote: bogus wrote: I am a huge fan of NGK. Yeah, I just took some NGKs out of there. I had no problem with them. Autolite's are quality plugs for the money too! I have read a lot of threads on this subject and I'm not too concerned with mfg as I am proper heat range. A copper core plug from one mfg is likely as good as the next. All the little extras like platinum, dble platinum, iridium, forked tongues and all are just icing on the cake for longevity or marketing from what I have gleaned.
	Posted on: 2011/4/7 11:00
	_________________ Don Haller Corvette Club of America 94Coupe, 383Stroka, PeteK Trans, 3000stall, 3.54rear, Konis and bigger sways.
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Matatk	Re: What spark plugs are you using in your LT1 383 strokers?	#7
Webmaster SW Chicago Burbs 22805 Posts Member since: 2008/1/7 0:00	I run NGKs. If you call their tech line with your motor and estimated hp they will recommend a heat range to you. I know in one of my old posts I have the part number I use, it's two ranges colder than stock. Matthew
	Posted on: 2011/4/7 11:32
	_________________ 2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP
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bogus	Re: What spark plugs are you using in your LT1 383 strokers?	#8
Grand Imperial Pooh-Bah San Pedro, CA 20859 Posts Member since: 2005/9/7 0:00	Quote: biggrizzly wrote: Quote: bogus wrote: I am a huge fan of NGK. Yeah, I just took some NGKs out of there. I had no problem with them. Autolite's are quality plugs for the money too! I have read a lot of threads on this subject and I'm not too concerned with mfg as I am proper heat range. A copper core plug from one mfg is likely as good as the next. All the little extras like platinum, dble platinum, iridium, forked tongues and all are just icing on the cake for longevity or marketing from what I have gleaned. I do believe that dbl platinum and iridium do work. Some other tricks they keep adding to plugs are just a joke. I have issue with a spark plug creating this super post apocalyptic flame front adding 20hp. Just ain't buying it. Spark. Fire. That's the trick.
	Posted on: 2011/4/7 17:46
	_________________ The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me
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fox_guy48	Re: What spark plugs are you using in your LT1 383 strokers?	#9
Guru Katterbach Germany 78 Posts Member since: 2010/10/16 10:55	I have had good luck with Denso plugs. when i worked in the shop we used denso and ac delco for the chevys we worked on
	Posted on: 2011/4/7 18:41
	_________________ 92 Polo Green, MSD Ignition, 1.6 roller rockers, TPIS Headers, Exhaust, Airfoil, Stage 2 Chip.
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pr0zac	Re: What spark plugs are you using in your LT1 383 strokers?	#10
Elite Guru Pittsburgh 1045 Posts Member since: 2008/10/20 23:28	i think youd be fine with a 104. the ngk are good plugs also.
	Posted on: 2011/4/7 19:25
	_________________ 96 lt4. 357ci, 11:1, LE 226/232, LE2 LT4 heads, ported LT4 intake, EM Gladiator44, EM LT's, stock exhaust, NX kit.
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89Vette	Re: What spark plugs are you using in your LT1 383 strokers?	#11
Senior Guru 135 Posts Member since: 2008/1/16 0:00	Shouldn't it be (somewhat) based on your compression? It's my understanding that colder plugs should be used with higher compression. I'm using a colder-than-stock plug because I'm higher compression now.
	Posted on: 2011/4/8 20:49
	_________________ 383 stroker -- Semi-Siamesed SLP long-runner intake, AFR 195's, 4-2-1 headers, and a SR cam. ZF6 short-throw shifter. Custom body/interior.
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biggrizzly	Re: What spark plugs are you using in your LT1 383 strokers?	#12
2011 Memorial Day Car Show Winner! Chesapeake Beach, Maryland 4543 Posts Member since: 2006/4/23 0:00	Quote: 89Vette wrote: Shouldn't it be (somewhat) based on your compression? It's my understanding that colder plugs should be used with higher compression. I'm using a colder-than-stock plug because I'm higher compression now. Yes... you are correct. I was running 104s before, but I actually had a little higher compression then. This 383 has 10.7, a little less than before. I'm going to go with 104s for now and see how they do.
	Posted on: 2011/4/8 21:02
	_________________ Don Haller Corvette Club of America 94Coupe, 383Stroka, PeteK Trans, 3000stall, 3.54rear, Konis and bigger sways.
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Matatk	Re: What spark plugs are you using in your LT1 383 strokers?	#13
Webmaster SW Chicago Burbs 22805 Posts Member since: 2008/1/7 0:00	http://www.carcraft.com/techarticles/spark_plugs_tips/index.html http://www.ngksparkplugs.com/tech_sup ... n/index.asp?mode=nml#heat
	Posted on: 2011/4/9 1:58
	_________________ 2002 EBM convertible, Magnusson supercharger, cam, headers, etc. 1989 Corvette...RIP
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