Do you guys stick with copper plugs or iridium?

**slimguns** · 08-02-2013

Just curious what most of y'all use. There is no following of the 3800 in NM so I have no reference.

I'm about to change plugs and currently was using copper. The game changer is I'll be installing a turbo kit within the month.

Thanks,
Slim

**TLSheff** · 08-02-2013

Standard stock use is a 41-101 Iridium plug

If you are modding you need to go with a cooler heat range. We will need alot more info about the car, year, what motor and mods you are using, and what turbo kit you plan to install. There is no basic information that can be given without knowing the specific to what you are using.

http://www.grandprixforums.net/safel...0-a-67580.html <<<< READ THIS

4) Spark Plugs - Change out those stock spark plugs with new ones to restore any lost power. Brands that most tend to go with are either Copper Core Autolites or NGK's. They range as follows in order from hottest to coldest plugs...remember...you want the hottest spark you can get away with...so running a super cold plug on a larger pulley to combat knock isn't the best plan...OEM replacement ACDelco's, AL606's, and AL605's are basically for stock cars or very small bolt-ons still running the stock S/C Pulley or modded N/A guys...you want to keep a hot spark. NGKTR55/AL104's for your 3.4" Setup, TR6's are a tad cooler...best used around the 3.25" pulley area, and AL103's...are for the extreme supercharged application...3.0" pulley or lower. Here is a picture to reference the firing order and the correct coil number if yours aren't numbered or you just need a quick reference picture:http://i33.photobucket.com/albums/d6.../plugwires.jpg

AC Delco Factory Replacements: Stock
Autolite 606: Stock
Autolite 605: 1 Heat Range Cooler
NGK TR55: 1 Heat Range Cooler
Autolite 104: 2 Heat Ranges Cooler
NGK TR6: 2 Heat Ranges Cooler
Autolite 103: 3 Heat Ranges Cooler

**slimguns** · 08-02-2013

I have read it a few times. I'm new to the turbo though. Is that "how to" for SC also good for turbo? I didn't know how much translated over...

My car will soon have the Stattama, 60# FI, 3 matching DP, 180* stat, 90# springs, A2A IC. To come is different but I don't plan on pushing more than 9-10 psi max for now...

Thanks

**TLSheff** · 08-02-2013

I would imagine a slightly cooler heat range plug would be what you would want, and a copper core of course.

The 3800 isn't exact for any car, but there is a big difference in a turbo car too. That thread is more baseline setup for the boosted cars, but each motor is different and never reacts the same way so what is good for one person may blow up yours.

Really you need to talk to a couple of the guys that have a turbo'd 3.8 and see what they did. Not very many go that route so the info isn't easily available.

**GTPpower** · 08-02-2013

Go with copper plugs.

**Fivefingerdeathpunch** · 08-02-2013

Copper for modded cars.

They only last 10-15k miles or untill the motor pops a piston, but at 12-13 bucks for 6 plugs you really can't beat that.

**MoarkatsINmuhtrailer** · 08-02-2013

Most turbo cars will run tr5s or 103s.

**txslow6** · 08-03-2013

I run autolite 103's

**FriboRage** · 08-03-2013

I've always wondered why are coppers so preferred over iridium plugs on a modded car..

I mean I had the 41-101's in, with my current mod list, and I've been planning to pulley down soon so I was thinking about how I'd have to throw cooler plugs in. I was thinking about if I should buy coppers or keep using iridiums, but I dont totally understand why copper is considered so superior.

Would I notice an improvement if I switched to coppers?