Rb25 spark plugs.

[rb25det250sx]

how come everyone tells me to use bcpr7es plugs, which will work but sparkplugs.com has completely diff plugs!!

http://www.sparkplugs.com/resu...=3727

[maryjane]

ngkr brk7e copper plugs, the new stock number is 4644 at any discount auto parts

[Joe]

because sparkplugs.com doesnt know everything?

bcpr7es. get them.

[rb25det250sx]

so whats the part number for 1 step cooler??

[robbie2883]

so whats the part number for 1 step cooler??

bcpr8es

[rb25det250sx]

i think for NGKs it goes down not up. and its like bcpr6ies so something like that

[DrifterProdigy85]

I like BKR7EIX Iridiums. Ive used bcpr6es-11 but didnt drive as smooth and didnt get as good of mileage.

[rb25det250sx]

can other people chime in??? i want everyones opinion!! Thanks

[Joe]

i think for NGKs it goes down not up. and its like bcpr6ies so something like that

NGK is up = colder. the number is the length of the internal shielding or some s***. longer shielding = colder plug

and there is no reason to run an 8. its TOO cold for a RB. 6 is the factory plug, 7 is perfect for people who drive their cars a little harder than normal.

[rb25det250sx]

ahh..okay thanks for clearing that up. . .

[robbie2883]

NGK is up = colder. the number is the length of the internal shielding or some s***. longer shielding = colder plug

and there is no reason to run an 8. its TOO cold for a RB. 6 is the factory plug, 7 is perfect for people who drive their cars a little harder than normal.

^yepp up is colder with almost ANY plug

[maryjane]

up=cooler

[Largekid]

ngkr brk7e copper plugs, the new stock number is 4644 at any discount auto parts

+1 I ran the irridiums for a while then switched over to coppers and wont go back. They are alot cheaper and work alot better imo

[Stiky]

What about BKR5E1X-11 plugs for an RB20 I asked my parts supplier for 300ZX plugs and that's what he gave me.

[nyc240sx]

iam going to go with BKR7E or bcpr7es i dont know whats better and do i have to pre gap them before i put them in?I have bcpr6es-11 in the car now i gapped them to 0.80 and the car has problems boosting at like 5500rpms
Modified by nyc240sx at 9:48 PM 11/22/2009

[wakotow]

well then try gapping them down a little and if it runs good then increase the gap as far as you can without blowing it out. I think right now mine are 7's at .028 or.030 (inches), I can't remember it's been too long, but it's not blowing out at 17psi (that's as high as I've had it)

[nyc240sx]

ok i have it set now at .8mm on my 6s but iam going with the 7s they supposed to hold up to 19psi boost

[Neejay]

ok i have it set now at .8mm on my 6s but iam going with the 7s they supposed to hold up to 19psi boost

Any updates? I just figured out that this is probably my problem too. I increased my boost to 10-11psi and added a FMIC and in 3rd/4th, I can't go WOT without feeling like Im hitting a brick wall.

I'm also using bcpr6es @ .8mm, and I'm looking into going with bcpr7es, but I'm not sure what to gap it to.

[stevespeed]

yeah the NGK... that everyone... has said..

we really need to just quickly compile all this info

I'll work on doing that

[sparkplugs.com]

hope this clears up a few things:

higher number, colder the plug on denso and ngk. american plugs are opposite. only reason to change heat range is if you've changed engine conditions. mods that added horsepower are the largest cause to necessitate a heat range change. every 75-100hp added, go one step colder.

regarding the plug listings...none of the data is created by sparkplugs.com. All data comes direct from the manufacturer. Therefore, we can only list the stock plugs for a vehicle, we can't list the colder plugs, etc. For US vehicles, this is updated every 6-12 months. The non-US lookup is something we created by special request from you guys. Going back about 5 years ago, we stole NGK Australia's app data to give that to you guys.

Using a plug with a different design from your stock plug type is dangerous (not talking about using iridum instead of platinum, or a colder plug when its necessitated, solely referring to if the plug configuration is different, which is obvious, as a general rule, if the part number before the heat range is different) and can cause engine damage. If anyone ever has any questions on if a plug will work for their engine/setup, or wants to know about possible problems, feel free to ask, that's what we're here for!

[nyc240sx]

same here i have the bcpr7es iam not sure where to gap them to either i might try leaving it factory see how it runs and then maybe regap them to .6 i've read on skyline australia when your gap is smaller you gain more little more hp

Any updates? I just figured out that this is probably my problem too. I increased my boost to 10-11psi and added a FMIC and in 3rd/4th, I can't go WOT without feeling like Im hitting a brick wall.

I'm also using bcpr6es @ .8mm, and I'm looking into going with bcpr7es, but I'm not sure what to gap it to.