One step colder plugs - TriStateTuners.com :: Home of Tristate Auto Enthusiast

AutobahnRacer · 08-14-2010, 01:05 AM

Maybe someone can help me out, I will try to ask/explain this as best as I can.

Stock plugs are BPR6ES. One step colder should be BPR7ES.

Now what the hell makes the plug colder? The BPR7ES apparently has an adjustable gap as where the BPR6ES has a gap of .028.

SO, what should the gap be set to for the BPR7ES if plug temperature is determined by gap?

sean3 · 08-14-2010, 02:07 AM

A plug is "colder" due to the thermal characteristics of the materials it is made with, not the gap. As far as actually gapping, you should see what other people are running with the same/similar setup.

DPancoast · 08-14-2010, 01:05 PM

just for the topic of this thread, I HATE gapping spark plugs.... lol

SovXietday · 08-14-2010, 01:07 PM

Quote:

Originally Posted by sean3

A plug is "colder" due to the thermal characteristics of the materials it is made with, not the gap. As far as actually gapping, you should see what other people are running with the same/similar setup.

Yep. It is able to withstand more heat and is less likely to preignite the charge in the cylinder. If the gap you were running before works, then you don't need to change it.

AutobahnRacer · 08-14-2010, 01:10 PM

Question than. Some people were saying run copper plugs for one step colder, while others are using iridium. Any input?

SovXietday · 08-14-2010, 01:18 PM

I'd stay away from iridium, also if I remember correctly you can't change plug gaps on those spark plugs.

IMO people put far too much thought into which spark plugs to run for just a normal daily streetable car. Just use the BPR7E (I use BKR7E in the hatch, I think they're nearly identical), gap it as you want, and enjoy. They're cheap and reliable and readily available. Can't beat it.

AutobahnRacer · 08-14-2010, 01:33 PM

Quote:

Originally Posted by SovXietday

IMO people put far too much thought into which spark plugs to run for just a normal daily streetable car.

Hahah like me. Thanks everyone for your help.

turboman808 · 08-14-2010, 02:01 PM

I use iridium for my sports cars. I had to go with a colder plug when I upgraded the tune on the solstice. The plugs looked ok but they stopped working.

My mechanic keeps telling me to use copper plugs in my porsche but I disagree. Iridium last alot longer and works just as good. To him it's a price thing. To me it's less time I have to spend working on the car.

But yeah Iridium is mucho expensive compared to copper. I can understand why many stick with them.

AutobahnRacer · 08-14-2010, 02:13 PM

Thats actually what they are going in, a 928 and a 911.

Honduh · 08-15-2010, 07:49 PM

Quote:

Originally Posted by DPancoast

just for the topic of this thread, I HATE gapping spark plugs.... lol

If you get one of those tools from autozone, the coin looking ones, its super easy.

marshallpre1 · 08-16-2010, 12:05 PM

Quote:

Originally Posted by SovXietday

I'd stay away from iridium, also if I remember correctly you can't change plug gaps on those spark plugs.

IMO people put far too much thought into which spark plugs to run for just a normal daily streetable car. Just use the BPR7E (I use BKR7E in the hatch, I think they're nearly identical), gap it as you want, and enjoy. They're cheap and reliable and readily available. Can't beat it.

I'm with this guy. BKR7E for the Supra, and BKR6E for the 240. I don't regap for either car. I think it comes in at .032. No break up, hiccups, etc. My 240 WAS breaking up before the plug change. Previous owner used Autolites and looked like the gap was .040. It was insane. I love NGK plugs. First check for ignition issues should always be plugs

jpalamar · 08-16-2010, 12:11 PM

Copper is a better conductor but doesn't last as long. If it isn't a track only car I would go with the Iradium plugs. They work just fine and last a long as time. My GTO came factory with Iradium as many cars are now and I have no complaints with 62k miles.

08-14-2010, 01:05 AM	#1
AutobahnRacer Tri-State Post Whore Join Date: Jun 2006 Location: TriState, PA Member #2056 iTrader: (3)	One step colder plugs Maybe someone can help me out, I will try to ask/explain this as best as I can. Stock plugs are BPR6ES. One step colder should be BPR7ES. Now what the hell makes the plug colder? The BPR7ES apparently has an adjustable gap as where the BPR6ES has a gap of .028. SO, what should the gap be set to for the BPR7ES if plug temperature is determined by gap? Last edited by AutobahnRacer; 08-14-2010 at 01:11 PM.

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08-14-2010, 02:07 AM	#2
sean3 Tri-State Post Whore Join Date: Sep 2007 Location: Cherry Hill, NJ Member #5757 My Ride: 04 Mach 1 iTrader: (0)	A plug is "colder" due to the thermal characteristics of the materials it is made with, not the gap. As far as actually gapping, you should see what other people are running with the same/similar setup.

08-14-2010, 01:10 PM	#5
AutobahnRacer Tri-State Post Whore Join Date: Jun 2006 Location: TriState, PA Member #2056 iTrader: (3)	Question than. Some people were saying run copper plugs for one step colder, while others are using iridium. Any input?

08-14-2010, 02:01 PM	#8
turboman808 Tri-State Addict Join Date: Jul 2007 Location: North Jersey Member #5285 iTrader: (0)	I use iridium for my sports cars. I had to go with a colder plug when I upgraded the tune on the solstice. The plugs looked ok but they stopped working. My mechanic keeps telling me to use copper plugs in my porsche but I disagree. Iridium last alot longer and works just as good. To him it's a price thing. To me it's less time I have to spend working on the car. But yeah Iridium is mucho expensive compared to copper. I can understand why many stick with them.

08-14-2010, 02:13 PM	#9
AutobahnRacer Tri-State Post Whore Join Date: Jun 2006 Location: TriState, PA Member #2056 iTrader: (3)	Thats actually what they are going in, a 928 and a 911.

08-16-2010, 12:11 PM	#12
jpalamar TST Ruined My Life! Join Date: May 2009 Location: Collegeville, PA Member #13773 My Ride: 03 Corvette Z06 iTrader: (3)	Copper is a better conductor but doesn't last as long. If it isn't a track only car I would go with the Iradium plugs. They work just fine and last a long as time. My GTO came factory with Iradium as many cars are now and I have no complaints with 62k miles.