Spark Plugs?

[hayden49]

First things first, i tired the search function but it SUCKS and is hardly worth using.

anyway, my 100k service is coming up and i need to get myself some spark plugs, im buying all the parts myself and getting someone to fit them.

I know that NGK make good plugs but which ones to use?

irridium? platinum?

i know theyre expensive but im willing to pay good money for a good product.

are there any other decent brands i should look at?

also, does anyone know of any sites where i can order these online?

the car is a 96 R33 Gt-st.

cheers

[D-limo]

Sponsor Kudos have free shipping on NGK plugs... Irridiums are good. I know people using NGK copper plugs($3 each) on 400hp engines I think the material used is more closer related to how long they last.

I really have no clue though

[mad082]

just go with coppers. you have to change them more often but they work out cheaper in the long run. i had iridiums in my car and they were stuffed after 20,000km. so thats $120 for 20,000ks, or $24 for 10,000ks. my mechanic uses them in his sr20.

the part number is something like BCPR6ES. not 100% sure but i know they are heat range 6.

Edited July 16, 2006 by mad082

[heslo]

Yep, use coppers, change em at every 10000k intervals. As for the part number, mad082 is right, BCPR6ES

[Suspense]

Yep, use coppers, change em at every 10000k intervals. As for the part number, mad082 is right, BCPR6ES

would there be any missfiring issues with these copper plugs @ 255rwkw @ 18psi driven by splitfire coilpacks?

[sinistaGTR]

not if there gapped right

[Scooby_Steve]

Hi Guys,

Going to buy some sparkies for my 33 GTST this weekend. Mad082 posted the part numbers BCPR6ES but why is it when you go to the NGK site, if you choose RB25DET the part number PFR5G-11 comes up? Any ideas?

I'm just a lil confused on which ones i should get. Also I assume i would have to gap these plugs?

[mad082]

don't bother typing in rb25det or anything like that. the plug that it brought up are a hotter plug, and gapped larger (easy to fix though).

the copper plugs will handle the power fine. they spark just as well as iridiums. you may just need to gap them a bit smaller than 0.8mm for 18psi. and you may possibly want to go to a heat range of 7.

[subzeroR33]

I put in irridiums bought them from Autobarn, gave the usual specs and they still gave me the wrong ones.

Double check there right before you put them in. Eg heat range and gap.

[Scooby_Steve]

Hi Guys,

I bought myself a set of BCPR6ES but i remember reading somewhere that they should be the BCPR6ES-11.

The only difference i believe is that the BCPR6ES has a standard gap whereas the BCPR6ES-11 had a gap of 1.1mm.

I measured the gap of the BCPR6ES using a feeler gauge and it was 0.8mm (which is what ideally would like the gap to be anyway).

So I assume the BCPR6ES is what most people are using not the BCPR6ES-11, that's if they are using just the standard copper plugs rather than the iridiums. Am I correct?

Please correct me if i'm wrong as i will be putting in my plugs today. thanks

Edited July 29, 2006 by Scooby_Steve

[mad082]

stick them in, they are right. the 0.8mm gap is what you want.

[Scooby_Steve]

thanks mad082.

[Botters]

Is it true that the Copper plugs should be gapped at 0.8mm and the Iridiums at 1.1mm? Due to the fact that the Iridiums are a better conductor so the gap can be slightly larger?

[mad082]

no, both should be gapped to 0.8mm. it is just that the factory spec is 1.1mm.

[arbess]

So does that mean the ones that i have in my gtr, should they be at 0.8mm?

If they arent should i be putting them down to 0.8mm?

[Botters]

i got some iridiums and i was told it was 1.1 so i just got them and put them in. Im interested in changing the gap to .8 but it said on the package do not change gap size. Or does it say that on all of them?

[mad082]

1.1 is fine if you are only running stock boost. the problem is that once you wind the boost up the extra air can blow the spark out. but reducing the gap you reduce the chance of the spark being blown out.

i think the reason why they don't want you to regap iridiums is incase you damage the tip.

[sloutch]

Hey how do u know if your spark plugs are stuffed up or not? What are the 'symptoms' ?

[mad082]

most common symptom is a slight miss/hesitation when under acceleration. or if you pull up after thrashing it and it stalls.

Edited July 30, 2006 by mad082