Best Spark Plugs?
Team Owner
Joined: Apr 2001
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From: S.W. Ohio. . . . . . NRA Life Member
AC Delco Iridium 41-985 ......... designed specifically for our engines
with them you won't be forced to get new plug wires, but if you want to upgrade them anyways, you can't beat MSD Super 8.5mm wires for $60 shipped:
http://www.autozone.com/servlet/UiBr...7C%7EEA%7C%7EV
Thread Starter
Drifting
Joined: Dec 2004
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From: Tempe Az
Originally Posted by 66427-450
AC Delco Iridium 41-985 
......... designed specifically for our engines (made by NGK i understand)
......... designed specifically for our engines (made by NGK i understand)
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From: I love you & miss you Linda
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Originally Posted by BlownV6
They're 7 dollars a plug where the NGK TR55's are 1.65 each. I think i'll stick with the NGk's.
I was just answering the post Question "What NGK plug is everyone using?"
That IS the plug all the NGK guys use, but they are NOT Iridiums, reason for the cost differential.
NGK does make that plug in Iridium also, I believe it's NGK TR-55ir
With your car runing a little rough you might want to try adding some Chevron Techron fuel injector cleaner to your fuel. You might (very well will) get a pleasant suprise.
Check it out.
http://www.chevron.com/prodserv/nafl...t/fueladd.shtm
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Thread Starter
Drifting
Joined: Dec 2004
Posts: 1,937
Likes: 1
From: Tempe Az
Originally Posted by Glennm27
I actually use the AC Delco Iridium 41-985 plugs.
I was just answering the post Question "What NGK plug is everyone using?"
That IS the plug all the NGK guys use, but they are NOT Iridiums, reason for the cost differential.
NGK does make that plug in Iridium also, I believe it's NGK TR-55ir
With your car runing a little rough you might want to try adding some Chevron Techron fuel injector cleaner to your fuel. You might (very well will) get a pleasant suprise.
Check it out.
http://www.chevron.com/prodserv/nafl...t/fueladd.shtm
I was just answering the post Question "What NGK plug is everyone using?"
That IS the plug all the NGK guys use, but they are NOT Iridiums, reason for the cost differential.
NGK does make that plug in Iridium also, I believe it's NGK TR-55ir
With your car runing a little rough you might want to try adding some Chevron Techron fuel injector cleaner to your fuel. You might (very well will) get a pleasant suprise.
Check it out.
http://www.chevron.com/prodserv/nafl...t/fueladd.shtm
Have you used the standard NGK's before you used the AC delco 41-985's? In your opinion.. Are the AC delco's worth the money? If so.. I'll try them out.
Safety Car
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From: Carefree, Arizona
2017 C7 of Year Finalist
Originally Posted by debmwb
what is the factory plug?
Andy
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From: Hanover MD
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tr-55's.
i had alot of problems with missfires in my trans am with the msd and the smaller taylor wires. the taylor thundervolts worked AWESOME!
i had alot of problems with missfires in my trans am with the msd and the smaller taylor wires. the taylor thundervolts worked AWESOME!
Safety Car
Joined: Mar 2002
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From: Southwest MI
Originally Posted by debmwb
Are the Iridiums the "standard" plug...or an upgrade. In other words...what is the factory plug?
Team Owner
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From: S.W. Ohio. . . . . . NRA Life Member
I think he meant his wires were causing misfires. Not the plugs
In-Other-Words the Bosch +4's can fool one into believing he has defective wires; when it's not the case.
They are very cold plugs to be using in the LS1; and they need as much voltage as they can get.
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NGK TR 55 IX Iridums and Magnecor Wires. Best Wires hands down!!!
Safety Car
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From: San Diego, CA "leaf" "tee" "e"
I'm pretty interested in trying out Brisk spark plugs, although the TR55's are proven performers. I'd avoid anything platinum. Platinum just doesn't make sense for use as a spark plug electrode...even if it doesn't wear or corrode, it will gunk up, and some of them actually fall apart. For exotic metals I'd only use iridiums (Denso or NGK) or silver (Brisk).
Team Owner
Joined: Mar 2005
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From: salem OR
Originally Posted by Mike Mercury
not necessarily. The Bosch +4 are known to not like LS1's with stock wires or "next better" sized wires.
In-Other-Words the Bosch +4's can fool one into believing he has defective wires; when it's not the case.
They are very cold plugs to be using in the LS1; and they need as much voltage as they can get.
In-Other-Words the Bosch +4's can fool one into believing he has defective wires; when it's not the case.
They are very cold plugs to be using in the LS1; and they need as much voltage as they can get.
I'll take the plus 4's.Plenty of voltage, For sure.
Last edited by 3 Z06ZR1; Mar 19, 2005 at 01:33 AM.