Looking at getting some new plugs for my GSR. Whats stock? I thought they were NGK, but the dealer says denso. Now I know NGK makes Denso, but which one is the one that Im supposed to use? Ive read about others using a an NGK plug for the Prelude (ZFR6F-11) is this what I should use? I pretty much stock just bolt on's. I think this (PFR6G-13) is the plug I should use but not sure. Someone give me a quick yes/no use this answer. Thanks.

Regards

 

NGK is stock. I forget the platinum #, I think it's on the catalyst and I know it's on the old plugs and the Helms, both of which are in the garage if you really need confirmation of this. I've been using the ZFR6F-11s(copper) for months however and they're just fine. I think the BKR may well be the proper copper plug to use, but I've not confirmed this.

 

NKG PFR6G-13 is the OEM platinum plug.

 

Is this the plug I should use?

 

The BKR model NGK coppers are the propper ones to put in place of the OEM platinums. I replaced mine this weekend because the dealer, and all other local places wanted $20 per plug for the OEM NGK's. The copper NGK's were $1.59 per plug and even though they must be changed every 15k and you have to gap them, it's still cheaper. And they run great. My car is running much better actually (probably cuz my OEM platinums had 55k on them)

 

Yep, I'm on my 3rd set of the copper plugs now, BKR6E-11. You can't beat $8 for four plugs.

 

i think it tells you what to use on the side of the timing belt cover...NGK

 

This is what I use but alot of other people use the NKG coppers. Copper plugs seem to work fine but they do need to be replaced more often at 30k (I believe) than the platinums at 60K. Pick whichever floats your boat...

 

what would be the proper copper plug and gap for a ls(se)... its the same gapping as platinum i suppose... what makes copper plugs better than platinum? thanks...

 

Well the term "better" here has several meanings. IMO the best plug for a vehicle with a strong ignition system is copper. Copper has a lower melting point than platinum and a much lower melting point than iridium, so it'll vaporize sooner if it gets too hot, but if you've noticed the latter two take advantage of this by having smaller electrodes. Now a more durable metal formed into a smaller electrode will require less voltage to create an arc(spark). Whilst a less durable metal(copper) formed into a thicker electrode will require more voltage to arc, but when it does it will create a stronger spark. Plus copper is simply a better conductor of electricity. Well silver is #1 and copper is #3, I believe aluminum is #4 or 5, I forget what is #2 however. Anyone?