Cold spark plug?

[CodeWhore]

What are you guys using for cold spark plugs? NGK used to make platinum PFR6C-11 (regular) and PFR7C-11 (cold), but all I can find these days is OE PFR5C-11... Thanks!

[Structure240sx]

5 is stock heat range. im using ngk bkr7es-11 copper, platinum are a no no. i have had this current set of coppers in for months and thousands of miles and everything is running great

[CodeWhore]

platinum are a no no

As long as they are cold, why not?

[Structure240sx]

for turbo apps plantinum can or will cause detonation. im not exactly sure why but for turbo either go with copper or iridium

[Frozen240]

I had no idea that a platinum plug on a turbo application could cause detonation, I was a running a set of bosch plugs and never thought that part of my problem would be from having platinum plugs. I'll have to research this a little more.....

Maybe we should have a sticky entitled, Things to make it go, and Things to make it go kaboom.

[4felix20]

good idea frozen...kind of like a 'Do's and Dont's' type of thing.

[BadMojo]

Maybe we should have a sticky entitled, Things to make it go, and Things to make it go kaboom.

Heh...that's pretty funny. I like that title. I do agree that it would be nice to easily be able to benefit from the misfortune of others.

Mods? Any possibility of this?

[IvanAtSPRacing]

Its my understanding that the platinum actually reacts to race fuel. Maybe the lead or something and thats why you stay away from them for turbo applications.

[CodeWhore]

Quote »Its my understanding that the platinum actually reacts to race fuel.[/quote]Yep, platinum should not be used with nitrous, as far as I know. Do you know of a reason why it's bad for turbo applications on pump gas and correct plug heat range?

So far I've found the following 7-range plugs:NGK BKR7EIX-11 (iridium)NGK BKR7ES-11 (copper)HKS 5408-S35i (iridium and very pricey)

[AZhitman]

FYI guys, check out our newest sponsor, Sparkplugs.com. Lots of good tech info there, even for forced induction.

Nice pricing too.

[sparkplugs.com]

The manufacturers SHOULD recommend the correct stock plug for turbo applications. For every 75-100 hp you add in mods, you should go 1-step colder.

Stock heat range is 5. But if you've been running a 7, and its not too cold, i'd stick with it, don't go any hotter. For one step colder, NGK does still make the PFR6C-11, but not a 7.

Here's a list of the recommended 7 plugs:The two you already recommended:BKR7ES-11 (copper)BKR7EIX-11 (iridium)and BKR7E-11(V power copper)

[IvanAtSPRacing]

How about something colder then 7s?? I plan on running about 650hp over stock on boost and 850hp over stock with spray on top of boost. I am a fan of regular copper plugs versus crazy designs or iridiums.

Whats the difference between the BKR7ES 11 and the non "11"

Thanks for your help and input.

[sparkplugs.com]

Colder than a 7 and you start running into racing plugs. If you're running that much hp over stock, I would call NGK's tech. 877-473-6767, Jon is menu option#2, then #2 again.

The -11 designation at the end of the plug is the gap setting. The BKR7E-11 has a .044" gap.

[DammitBobby]

Could you tell if we are running the right plugs if we send you a pic of our current plugs?

[sparkplugs.com]

"Could you tell if we are running the right plugs if we send you a pic of our current plugs?"

RE: If you haven't made any mods to the vehicle, you can use the make/model lookup on sparkplugs.com to find the recommended part#, and compare the part# or the picture to the plug you have.

If you've added more than 200 hp, or made other mods to the car, you'll want to call the tech at NGK. Let me know if you have any questions.