getting new spark plugs hopefully...heat ranges?!?

SideWinderGX · 02-21-2007, 03:15 AM

firstly, thanks for the tips. secondly, id like to verbally rip you apart for just posting a bunch of links to places that have information about spark plugs and not tell me what would be a good choice for a stock\BPU 87 supra....although the information is quite good, im reading it now.

could you throw some links towards me of some good quality and performance, but moderately priced plugs please? id rather not spend over ~200 dollars on 6 plugs, thats kind of a lot lol. thanks for the info again, too.

IHateHacks · 02-21-2007, 03:32 AM

If you read those articles they will explain exactly what spark plug heat ranges mean. Its complex and hard to explain with just words, pictures help.

Bottom line, unless you are running 300rwhp you need stock heat range plugs. If you run colder ones, you will foul them out.

NGK iridiums can be found here for $39+ shipping.

SideWinderGX · 02-21-2007, 03:37 AM

gotcha. that NGK linnk was the best one. god, its like a worrywarts nightmare :-X in order to get a colder spark plug, youd have to find out the temperature inside the cylinder (inside 500 and 800C is the best)...but how would you find that out? i think i read something about that in the first\second link, but didnt really tell me...basically, octane, compression, gap, plug elements, and timing all come into play, but im not sure how youd choose to go colder a level or two or three.

not saying im going to, but it wouldnt hurt to know

heeeey, thanks for the link. that says 40 bucks for a set of six...so the spark plugs at supraspeed.com arent for one, theyre for 6? haha i thought it was gonna cost me like three paychecks.

IHateHacks · 02-21-2007, 03:45 AM

You'll know the temp inside the combustion chambers by inspecting the spark plug after you've run it. Basically the more power you make the hotter the temps and thats when you go to a colder plug.

It's not something to be worried about with a stock engine. You should be saving your money for all the parts and tools you are going to need for that head gasket, now thats what I'd be worring about.

SideWinderGX · 02-21-2007, 04:05 AM

ok, 6 is the stock level of spark plugs...and supra sports plugs are the same (wee, i compared part numbers, im a genius :-P) as the link you gave me, but are 15 bucks more expensive. thanks again!

yeah, i am saving for the headgasket job. maybe another month and ill have about a grand. but, i wont be able to do it myself, im not that good with engines yet and i DEFINITELY dont wanna mess anything up...my friend said shed get me a deal with her mechanic who fixes her eclipse. one of the packages on suprasport for the headgasket repair has a timing belt in the list...i dont really need that, just a headgasket and studs, right?

redmaro · 02-21-2007, 04:22 AM

Yeah change the timing belt while your at it. Its only like $30, I think.

SideWinderGX · 02-21-2007, 04:49 AM

whats the timing belt do, anyways?

edit: crankshaft to camshaft...got it.
edit again: erm...is it the same as a serpentine belt? just two different names for the same part? i know what a serpentine belt is haha, me n my dad replaced it on my 94 saturn.

mrnickleye · 02-21-2007, 03:42 AM

We use only Autolite platinum plugs in every vehicle at my shop. Been using them for 30 yrs without a failure.

I have seen lots of failed plugs from Champion, Bosch, and those 'trick' ones.

Most of the techs that I respect (because they are very smart, and many have race cars), won't touch the two brands I mentioned.

Denso may be a good choice. I used them in my race motoX bikes. NGK is also a good choice.

Read those articles, as they discuss going colder plugs per a certain amount of HP increase.

SideWinderGX · 02-21-2007, 03:44 AM

i havent heard of those brands, so i probably wouldnt have bought them...but thank you for the heads up.

read the articles, very informative, ill read em over again tomorrow to make sure i remember all the info. i think its for every 75-100 HP you gain, you go down one cold level on your plugs. which i wont have to worry about for a while haha.

NGK iridiums are my first choice, they seem to be really popular and have great results, but ill keep my eyes peeled for any autolite platinums too.

02-21-2007, 04:22 AM	#6
redmaro walbro fp Join Date: Mar 2006 Location: arizona Posts: 432	Yeah change the timing belt while your at it. Its only like $30, I think. __________________ MK3, Auto, Turbo.

02-21-2007, 04:49 AM	#7
SideWinderGX 3" Exhaust Join Date: Feb 2007 Location: Syracuse, NY Posts: 203	whats the timing belt do, anyways? edit: crankshaft to camshaft...got it. edit again: erm...is it the same as a serpentine belt? just two different names for the same part? i know what a serpentine belt is haha, me n my dad replaced it on my 94 saturn. Last edited by SideWinderGX; 02-21-2007 at 04:52 AM.

02-21-2007, 03:42 AM	#8
mrnickleye 1000whp postwhore Join Date: Jun 2005 Location: Mojave Desert, Calif. Posts: 1,705	We use only Autolite platinum plugs in every vehicle at my shop. Been using them for 30 yrs without a failure. I have seen lots of failed plugs from Champion, Bosch, and those 'trick' ones. Most of the techs that I respect (because they are very smart, and many have race cars), won't touch the two brands I mentioned. Denso may be a good choice. I used them in my race motoX bikes. NGK is also a good choice. Read those articles, as they discuss going colder plugs per a certain amount of HP increase. __________________ Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08.

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02-21-2007, 03:15 AM	#1
SideWinderGX 3" Exhaust Join Date: Feb 2007 Location: Syracuse, NY Posts: 203	firstly, thanks for the tips. secondly, id like to verbally rip you apart for just posting a bunch of links to places that have information about spark plugs and not tell me what would be a good choice for a stock\BPU 87 supra....although the information is quite good, im reading it now. could you throw some links towards me of some good quality and performance, but moderately priced plugs please? id rather not spend over ~200 dollars on 6 plugs, thats kind of a lot lol. thanks for the info again, too.

02-21-2007, 03:32 AM	#2
IHateHacks 20psi boost Join Date: May 2006 Location: New Haven/Hamden Posts: 793	If you read those articles they will explain exactly what spark plug heat ranges mean. Its complex and hard to explain with just words, pictures help. Bottom line, unless you are running 300rwhp you need stock heat range plugs. If you run colder ones, you will foul them out. NGK iridiums can be found here for $39+ shipping.

02-21-2007, 03:37 AM	#3
SideWinderGX 3" Exhaust Join Date: Feb 2007 Location: Syracuse, NY Posts: 203	gotcha. that NGK linnk was the best one. god, its like a worrywarts nightmare :-X in order to get a colder spark plug, youd have to find out the temperature inside the cylinder (inside 500 and 800C is the best)...but how would you find that out? i think i read something about that in the first\second link, but didnt really tell me...basically, octane, compression, gap, plug elements, and timing all come into play, but im not sure how youd choose to go colder a level or two or three. not saying im going to, but it wouldnt hurt to know heeeey, thanks for the link. that says 40 bucks for a set of six...so the spark plugs at supraspeed.com arent for one, theyre for 6? haha i thought it was gonna cost me like three paychecks.

02-21-2007, 03:45 AM	#4
IHateHacks 20psi boost Join Date: May 2006 Location: New Haven/Hamden Posts: 793	You'll know the temp inside the combustion chambers by inspecting the spark plug after you've run it. Basically the more power you make the hotter the temps and thats when you go to a colder plug. It's not something to be worried about with a stock engine. You should be saving your money for all the parts and tools you are going to need for that head gasket, now thats what I'd be worring about.

02-21-2007, 04:05 AM	#5
SideWinderGX 3" Exhaust Join Date: Feb 2007 Location: Syracuse, NY Posts: 203	ok, 6 is the stock level of spark plugs...and supra sports plugs are the same (wee, i compared part numbers, im a genius :-P) as the link you gave me, but are 15 bucks more expensive. thanks again! yeah, i am saving for the headgasket job. maybe another month and ill have about a grand. but, i wont be able to do it myself, im not that good with engines yet and i DEFINITELY dont wanna mess anything up...my friend said shed get me a deal with her mechanic who fixes her eclipse. one of the packages on suprasport for the headgasket repair has a timing belt in the list...i dont really need that, just a headgasket and studs, right?

02-21-2007, 03:44 AM	#9
SideWinderGX 3" Exhaust Join Date: Feb 2007 Location: Syracuse, NY Posts: 203	i havent heard of those brands, so i probably wouldnt have bought them...but thank you for the heads up. read the articles, very informative, ill read em over again tomorrow to make sure i remember all the info. i think its for every 75-100 HP you gain, you go down one cold level on your plugs. which i wont have to worry about for a while haha. NGK iridiums are my first choice, they seem to be really popular and have great results, but ill keep my eyes peeled for any autolite platinums too.