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yes take them back and get 7s. in fact, personally I'd take them back and get some copper NGK 7s. BCPER7ES from memory. cost about $18 for a set of 6 instead of $18 each. you should be checking and replacing fairly regularly anyway and doing that with iridiums or platinums gets pretty pricey at $120 a change.

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Sorry to jack the thread... but i'm actually looking at buying normal plugs but i duno the exact part number, i purchased the iridum type but everyone is right you need to change em regularly and $120 each time is a bit pricey... i'd just like confirmation if this is the correct part number BCPR7ES or BCPR7ES-11? and them gap em to .8? Thanks everyone..

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yes take them back and get 7s. in fact, personally I'd take them back and get some copper NGK 7s. BCPER7ES from memory. cost about $18 for a set of 6 instead of $18 each. you should be checking and replacing fairly regularly anyway and doing that with iridiums or platinums gets pretty pricey at $120 a change.

Excellent thats just what i did 3 bucks each in stead of 18 and you can change them every oil change or not and i get the same fuel economy from the cheaper ones two

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Are you saying the copper ones ARE BETTER or are you saying the copper ones are just cheaper and will OUTPERFORM iridium IXs. a set of 6 will cost u around 90 bucks that isnt much and it makes a GREAT spark. Iridium outperforms Copper. FACT.

Edited by Pauly33GTS-t
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I think what they're saying is that you'll change copper every oil change which would be what? <5k? as apposed to changing every second oil change with iridium <10k?? I was reading on the net about the iridums and they give a whole 2kw difference in performance apparently (dyno proven)... but again if anyone can help me with part #'s for copper for a rb25det that'll be great. So in effect you can buy 5 sets of copper for 1 set of iridium... even if you change em every 2-3k your still in front i guess... anyone would like to shed some light on this?

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the platniums should restand heat and abuse more than the coppers.. less prone to heads being blown off. but they still lose efficency within 10k.. so may aswell replace them. using the coppers ull save money and change them at the same intervals...

whats the exact part number for the RB25DET Neo for 0.8mm coppers.?

i got $8 each platnium DENSOs for the R. bit better than coppers for $3

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Please read the sticky FI Guide.

There is a link to a very very long thread about spark plugs, types, ranges, whats good/whats not etc etc :wave:

Someone took the time to type it up, do them the justice and have a read of it :huh:

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Sorry to jack the thread... but i'm actually looking at buying normal plugs but i duno the exact part number, i purchased the iridum type but everyone is right you need to change em regularly and $120 each time is a bit pricey... i'd just like confirmation if this is the correct part number BCPR7ES or BCPR7ES-11? and them gap em to .8? Thanks everyone..

BCPR7ES is what you want. they come gapped to .8mm. the ones that end in -11 come gapped to 1.1mm... just a note, no matter what you buy always check all the gaps before installing them.

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BCPR7ES is what you want. they come gapped to .8mm. the ones that end in -11 come gapped to 1.1mm... just a note, no matter what you buy always check all the gaps before installing them.

so is the 7 the heat range and what the S stand for?

bcpr7eS

is ther a way to read plugs like tyres. eg235/45/17 66V whatever it is?

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B-thread diameter hexagon

P-construction (ex. p-projected insulator nose. m-compact type)

2-11-heat range

E-thread reach

S- firing end construction (eg. s-copper core centre electrode(super))

-

9-20-Wide gap (eg. 9-0.9mm-20-2.0mm)

hope this helps

Edited by johnbarry88
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I've been looking at this thread and it seems to kind of answer everyones qustion, I think this is what nismo dude what referring to cos theres A LOT of info here...

http://www.skylinesaustralia.com/forums/in...howtopic=104405

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this was just jap who sold them to me. and i asked if they were the right heat range, and he said yes and sold them to me.

then when i showed my mate he said i should take them back.

well from memory he's right. they are the heat range specified in the workshop manual. so it's not really his fault for selling them to you. but what I know that he doesn't is that you are running aftermarket turbos, and lots of boost, and planning track use so with that in mind 1 heat range cooler is advisable. so in short, swap them for some 7s.

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