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Old 12-04-2006, 02:47 PM   #11
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Quote:
Originally Posted by BillBoost37
Actually Pete, different opinions and more information is why the club exists. Everyones opinion and experience are welcomed.

In this particular case... comparing Platinum to Iridiium is the same as comparing the L36 and L67 engines and expecting them to be identical. Same goes for comparing a copper based plug to either of the others. The materials used make big differences.
Agreed...

Irridium beats Plats hands down.... But if you are a boosted application then stick with either copper or irridiums... And yes the materials used do make a diffrence..

I ran Rapidfire Plats in my 95 for roughly 2 years, and I beat the crapp out of the car... I did a max of 32mpg on them and still pulled a 30 MPG in the mountains with my foot on it.... When I pulled the pLats out to install a new set of TR55'*, the Plats looked brand new...

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Old 12-04-2006, 02:47 PM   #12
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I think the reason for the development of the iridium plugs had more to do with extending the change interval than for improving performance. Improved performance may be a benefit, especially when compared with a copper core plug nearing the end of its service life.

I like to use the iridium plugs when I am doing engine work on minivans and other vehicles whose firewall plugs are nearly inaccessible. They are supposed to be good for 100K. Some of these are such a PITA to change that you don't want to use a product that needs to be replaced any earlier than necessary.

My take on the collective experience of a lot of 3800 enthusiasts here on BC, is a preference for NGK TR55 plugs. If the guys who race these engines and have spent many $$$$ trying to optimize performance, don't run platinum or iridium, but prefer the NGKs, that'* good enough for me.

I have been very happy with the Belden premium wires and NGK TR55s in my L36.
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Old 12-04-2006, 02:50 PM   #13
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Quote:
Originally Posted by jr's3800
I ran Rapidfire Plats in my 95 for roughly 2 years, and I beat the crapp out of the car... I did a max of 32mpg on them and still pulled a 30 MPG in the mountains with my foot on it.... When I pulled the pLats out to install a new set of TR55'*, the Plats looked brand new...
So, how do the TR55'* compare to the plats in your L36?
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Old 12-04-2006, 02:53 PM   #14
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To a large degree, when they are brand new...a spark plug is a spark plug, is a spark plug. It'* what happens to it over time. If I could find a way to plug the hole properly, I could stick any two wires in there, gap them, start it up and it will fire....for a while.

The iridium plugs are made and designed to last much longer than the standard copper plugs, and can withstand the punishment of a supercharged engine better than platinum. It'* the properties of iridium that makes it that way. Anything that uses spark plugs, new or old, will benefit from iridium because of its extra durability.

The largest drawback to the iridiums is the cost. Over the long term, they'll likely save you money. In the short term, they're more expensive.
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Old 12-04-2006, 07:01 PM   #15
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i know lets start a new thread on who makes the BEST OIL & OIL FILTER ? ?



































j/k

ROD
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Old 12-04-2006, 08:03 PM   #16
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Default Platinum or Irridium

All I know is that I tried the NGK'* and the Irridum'* on my N/A SSE. Both worked fine, but I had the best mileage / performance with Bosch+4s. Heck my old 1993 SSE (N/A) did best with Splitfires when they were new on the market.

I do know that I am TOTALLY against any of these extended use products. I don't care if it'* oil / filter combos that will last to 5K or 9K, or 100K coolant, or 100K plugs. It'* all B.*. to me.

The best thing, in my mind, is to use the best products and change them regularly. That way if there is a problem, you'll know.

Come on, let'* face it. Anything can fail, it'* better to keep a check on things regularly and replace them before they make things worse.

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Old 12-04-2006, 08:37 PM   #17
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Chip, you're an odd case. Nearly every car here that has ever tried Bosch plugs has had a HORRIBLE time with them within the first 6 months. 30 days for nearly every Bosch 02 sensor. Probably less than that for Bosch plug wires.

I wish you luck.

It should be stated to NEVER run PLATINUM plugs in a Supercharged Bonneville. They cannot dissipate heat as well as plain copper plugs or Irridium.
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Old 12-04-2006, 11:13 PM   #18
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Default I can see that.

I can see that. Platinum is a softer metal, so it only makes sense. But then again I was always running 180 deg therm on a normally aspirated SSE with a K&N filter too.

I wonder if the Bosch +4 Iridium fusion'* would work???
http://www.boschautoparts.com/Produc...Plugs/IrFusion

I think that whatever works, they should be pulled and checked regularly. You learn a lot about the car pulling plugs and changing your own fluids, filters, brakes, etc..

Set it and forget it may work for a Ronco Showtime Rotisserie, but not for a car you care about and trust your life to.
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Old 12-05-2006, 12:49 AM   #19
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http://www.partsamerica.com/ProductL...or=Spark+Plugs

For Vehicle: 2000 BUICK LESABRE CUSTOM V6 3.8 Liter FI
________________________________________

Autolite
Part No. 606
Copper Core Spark Plug
Gap @ .060"
Warranty: 2 Year Replacement
Price Is Per Spark Plug: $1.49
________________________________________

Autolite
Part No. AP606
Platinum Spark Plug
Gap @ .060"
Warranty: 3 Year Unlimited
Price Is Per Spark Plug: $2.69
________________________________________

Autolite
Part No. APP606
Double Platinum Spark Plug
Gap @ .060"
Warranty: 5 Year/ 50,000 Mile
Price Is Per Spark Plug: $3.99
________________________________________

Autolite
Part No. XP606
Xtreme Performance Spark Plug
Gap @ .060"
Warranty: None Listed
Price Is Per Spark Plug: $5.99
________________________________________

Champion
Part No. RS14YC6
Copper Plus Spark Plug
Gap @ .060
Warranty: 1 Year Replacement
Price Is Per Spark Plug: $1.49
________________________________________

Champion
Part No. 3013
Platinum Power Spark Plug
Gap @ .060"
Warranty: 1 Year Replacement
Price Is Per Spark Plug: $2.49
________________________________________

Champion
Part No. 7013
Double Platinum Spark Plug
Gap @ .060"
Warranty: 1 Year Limited
Price Is Per Spark Plug: $6.59
________________________________________
Champion
Part No. 9404
Iridium Spark Plug
Gap @ .060"
Warranty: 1 Year Replacement
Price Is Per Spark Plug: $9.88
________________________________________

AC Delco
Part No. 41921
Professional Platinum Spark Plug
Gap @ .060"
Warranty: 3 Month Limited
Price Is Per Spark Plug: $9.99
________________________________________

AC Delco
Part No. 41101
Iridium Professional Platinum Spark Plug
Gap @ .060"
Warranty: 3 Month Limited
Price Is Per Spark Plug: $11.99
________________________________________

NGK
Part No. TR55
V-Power Spark Plug
Gap @ .060"
Warranty: 1 Year Replacement
Price Is Per Spark Plug: $1.99
________________________________________

NGK
Part No. TR55GP
G-Power Platinum Spark Plug
Gap @ .060"
Warranty: 2 Year Replacement
Price Is Per Spark Plug: $2.99
________________________________________

NGK
Part No.TR55IX
Iridium Spark Plug
Do Not Re-Gap
Warranty: 2 Year Replacement
Price Is Per Spark Plug: $6.99
________________________________________

NGK
Part No. PTR4B-15
Laser Platinum Spark Plug
Gap @ .060"
Warranty: 3 Month Limited
Price Is Per Spark Plug: $13.99
________________________________________

NGK
Part No. ITR4A15
Laser Iridium Spark Plug
Gap @ .060"
Warranty: 3 Month Limited
Price Is Per Spark Plug: $13.99
________________________________________
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Old 12-05-2006, 09:43 AM   #20
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Use one of each if you can't make up your mind.
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