Best Spark Plugs?

**Wulfe13** · 01-13-2007, 10:16 PM

I just ordered a set of MSD wires for my T/A and as soon as I get them, I'll be putting them on. While I'm at it, I need to change the plugs as well. What are the best ones to use on a mostly stock engine? Pretty much just headers and free mods, lid, MAF, and bellows... oh and HPP3.

The car is missing between 1500-2000 rpms when barely giving it gas. If I give it more gas, it runs fine. Only happens when I'm doing like 20-30 mph. Just broke 65k miles on it so I figure this should be my first step.

**Wulfe13** · 01-14-2007, 12:40 PM

16 views and not even 1 simple reply???

C'mon!

**Zboner** · 01-14-2007, 01:00 PM

ngk tr55's I have heard a lot of problems with spark with the MSD's i went taylor, but to each his own

**Wesman** · 01-14-2007, 01:29 PM

When my plugs started going, my car did the exact same thing. Misfiring under a load between 1,000 and 2,000RPM. When I pulled them out nat 82K miles, they were still the original plugs, and the gap was .080

I replaced them with AC Delco Iridium plugs (made by NGK), and I've been very happy with them. They exceed the performance of Platinum plugs in every respect, and are designed to last 100,000 miles with "virtually" no gap erosion.

**89LX** · 01-14-2007, 01:46 PM

NGK TR55 and MSD wires are proven excellent for a stock to mild engine.

**Wulfe13** · 01-14-2007, 02:09 PM

Originally Posted by Zboner

ngk tr55's I have heard a lot of problems with spark with the MSD's i went taylor, but to each his own

Well I'm on a budget right now (baby due in Feb.) and I picked these up for $45 shipped on eBay, and I've always had good luck with MSD.

I'll check out those NGK's. What plugs came factory on our LS1's?

**GatorSS** · 01-14-2007, 02:17 PM

I bought my LS1 brand new and it came with Denso Iridium plugs.

**Wesman** · 01-14-2007, 04:16 PM

Originally Posted by GatorSS

I bought my LS1 brand new and it came with Denso Iridium plugs.

You sure about that?? I thought all stock GM vehicles came with AC Delco plugs...

**89LX** · 01-14-2007, 04:26 PM

Mine were AC 41-952 25321615 (written on plug).

**Wesman** · 01-14-2007, 04:57 PM

Originally Posted by 89LX

Mine were AC 41-952 25321615 (written on plug).

Same here.

My '98 came stock with AC Delco Platinums.

**Zboner** · 01-14-2007, 05:21 PM

Originally Posted by Wulfe13

Well I'm on a budget right now (baby due in Feb.) and I picked these up for $45 shipped on eBay, and I've always had good luck with MSD.

I'll check out those NGK's. What plugs came factory on our LS1's?

dayum, i got my taylors for 45 bucks new

**Wulfe13** · 01-14-2007, 06:29 PM

Originally Posted by Zboner

dayum, i got my taylors for 45 bucks new

These are new. I wouldn't buy used wires...

**barryTA** · 01-16-2007, 02:04 PM

Id go with ngk TR55ix and granatelli wires

**GatorSS** · 01-18-2007, 10:22 PM

Originally Posted by Wesman

You sure about that?? I thought all stock GM vehicles came with AC Delco plugs...

Yes, I am positive. I changed the original plugs last year and still have them. I'm looking at them right now. It is plainly printed "DENSO PTJ16R15 12563707" on each plug.

**2manycis** · 01-19-2007, 07:18 PM

Unless you're going with nitrous where you have to run colder plugs or upgrading your ignition system dramatically then I'd say OEM is best. Good ol stock ac delco plugs and wires.

**hamburger68** · 01-19-2007, 11:23 PM

I got OWS Iridium plugs, IMO no matter what brand, iridium plugs are the weapon of choice, 'cause you prolly never have to change them again. (we all know how much fun that is...)

**Fastcar** · 01-20-2007, 01:05 AM

Originally Posted by Zboner

dayum, i got my taylors for 45 bucks new

You didn't get ThunderVolts for that price? My 10.5 mm. wires went for about $95 shipped! (Maybe they saw me coming....) I agree with Zboner, Taylor's and NGK Iridiums, just my $100+.... (for plugs & wires). Don't change these puppies that often - spend a little more up front and be done and worry-free. Too much pain involved in getting the rear plugs out to worry about a few extra bucks.

**Wheeler99WS6** · 01-20-2007, 03:56 AM

NGK Iridiums for me.

**sic2001** · 01-20-2007, 05:24 AM

denso iridiums are superior and are specific for year and mods. A bit more expensive but like was stated, better to do it with the best and relax.

**Steve Crowe** · 01-20-2007, 05:27 AM

What are the best ones to use on a mostly stock engine?

Mostly stock plugs. :-) AC-Delco 41-932 are a great plug for stok to mildly modded engines and as many have mentioned the AC-Delco or NGK Iridiums are excellent - again provided you're not stuffing boost or nitrous down your engine's throat.

The car is missing between 1500-2000 rpms when barely giving it gas. If I give it more gas, it runs fine. Only happens when I'm doing like 20-30 mph. Just broke 65k miles on it so I figure this should be my first step.

That doesn't sound like the fault of plugs or wires.