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78porsche924 · Posted: Thu May 08, 2003 10:49 am Post subject: New spark plugs

I am going to need new spark plugs. I have been told i should probably run hotter plugs because i got a turbo. What would any of you recommend? I plan on getting a msd blaster 2 coil if that makes any difference from jegs. Also what are the specs as to sizes and stuff like that.

Thanks
Bobby
_________________
90 944 S2
78 924 NA <---now sold and killed by new owner
snailshell trans
Bae turbo kit
to check out my 944 S2 http://www.cardomain.com/member_pages/view_page.pl?page_id=388139

Roger · Joined: 06 Jan 2003 Posts: 1235 Location: Cordova, TN

I ordered some hotter plugs they are Bosch W5DC
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1981 924 NA

Some people are like Slinkies. Not really good for anything, but you
still can't help but smile when you see one tumble down the stairs.

78porsche924 · Posted: Fri May 09, 2003 8:56 am Post subject:

Thanks. I am looking for basically the best plugs i can get. I don't mind spending more for them. Are these the best out there?
_________________
90 944 S2
78 924 NA <---now sold and killed by new owner
snailshell trans
Bae turbo kit
to check out my 944 S2 http://www.cardomain.com/member_pages/view_page.pl?page_id=388139

wdb · Joined: 02 Nov 2002 Posts: 2024

I believe hot plugs are for city driving ,(alot of short trips .) they get hot fast to burn off deposits . if you do mostly highway miles you want the cool plugs .

78porsche924 · Posted: Fri May 09, 2003 9:14 am Post subject:

O, lizard said it sounded like i needed hotter plugs because my engine to cut out at higher rpms with the pedal down. I know there is something up with the ignition because it got better once i fixed a contact of the ignition wire on my battery. Still not all that great though.
_________________
90 944 S2
78 924 NA <---now sold and killed by new owner
snailshell trans
Bae turbo kit
to check out my 944 S2 http://www.cardomain.com/member_pages/view_page.pl?page_id=388139

Lizard · Posted: Fri May 09, 2003 9:17 am Post subject:

sorry 78porsche924, you miss understood me, I said a hotter spark not spark plug, basically a new ignition coil like MSD blaster 2 ignition coil
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3 928s,

78porsche924 · Posted: Fri May 09, 2003 9:23 am Post subject:

Oh, sorry man. Good thing u caught this post before i did something stupid. I am going with that coil anyway. I need to replace my spark plugs cause they are kinda old. Are the bosche 4+ platinum really worth the money? Which part number would be best for my car if they are or how do i find out?

thanks
bobby
_________________
90 944 S2
78 924 NA <---now sold and killed by new owner
snailshell trans
Bae turbo kit
to check out my 944 S2 http://www.cardomain.com/member_pages/view_page.pl?page_id=388139

Roger · Joined: 06 Jan 2003 Posts: 1235 Location: Cordova, TN

They are not the best plugs out there. They are a coper core plug. I am not really a beliver in multiple electrode plugs. I think platinum pugs are better but thats only because they can last longer. More spark more horsepower? More spark better gas millage? I doubt it does much. Once the gas is ignited it is going to burn at the same rate. I have read this before but I may not remember it correctly. Hotter plugs have a longer insulator to withstand higher temps in the combustion chamber. Mostly to keep from burning the plugs under extreme driving conditions. I also doubt that a better coil adds much. The stock coil operates at something like 10,000 volts. I am not really sure about that number, but the point is that once the gas is ignited it still burns at the same rate. If you are going to replace the system upgrading is a good idea, but will it make much difference for average driving conditions?
_________________
1981 924 NA

Some people are like Slinkies. Not really good for anything, but you
still can't help but smile when you see one tumble down the stairs.

Lizard · Posted: Fri May 09, 2003 9:41 am Post subject:

the bosch platnum +4 are nice plugs but I don't like how the electrode is surrounded by insulation, makes it to prone to high speed glazing, which is a film that conducts electricity, lowering the amount of spark.

speaking of which does anyone have a dual spark setup on there car and does it help?
_________________
3 928s,

Phogphire1 · Joined: 05 Apr 2003 Posts: 293 Location: Portland, OR

I read somewhere that the only perfomance improvment from the +2 or +4 plugs are on the Turbo or Multi-valve cars otherwise you are throwing your $ away and even the platinum is most advantougeus where you have diffcult acess to the plug i.e. some trans mounted V6 engines mainly FWD cars.
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Extremism in the defense of liberty is no vice. And moderation in the pursuit of justice is no virtue.

Life, Liberty and the Pursuit of thoose that dare screw with it.

Lizard · Posted: Fri May 09, 2003 9:54 am Post subject:

the hotter spark does make abit of a difference, and on a failing system it makes a big difference
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3 928s,

78porsche924 · Posted: Fri May 09, 2003 10:21 am Post subject:

So the consensus is go 4+?
_________________
90 944 S2
78 924 NA <---now sold and killed by new owner
snailshell trans
Bae turbo kit
to check out my 944 S2 http://www.cardomain.com/member_pages/view_page.pl?page_id=388139

Roger · Joined: 06 Jan 2003 Posts: 1235 Location: Cordova, TN

It cant hurt
_________________
1981 924 NA

Some people are like Slinkies. Not really good for anything, but you
still can't help but smile when you see one tumble down the stairs.

78porsche924 · Posted: Fri May 09, 2003 10:35 am Post subject:

Thanks
_________________
90 944 S2
78 924 NA <---now sold and killed by new owner
snailshell trans
Bae turbo kit
to check out my 944 S2 http://www.cardomain.com/member_pages/view_page.pl?page_id=388139

moone924 · Joined: 05 Feb 2003 Posts: 869 Location: Douglas Wyoming

THis guy www.eurocars.bz once told me platiums are really only good for Turbo cars. He thinks Bosch Supers are the best all around plug.
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Ryan Moone

Always shopping for a nice s2 931 to baby.
New philosophy : one car project at a time.