Spark plugs

[got_boost!]

Here is the info I have on spark plugs for the R32 and R33 with NGK:

Spark Plugs
NGK plugs are pre gapped at .8mm if there is no gap number on the end specifying otherwise, eg:

BCPR6EIX = NGK iridium heatrange 6 gap = .8mm

BCPR6EIX-11 = NGK iridium heatrange 6 gap = 1.1mm

BCPR5EIX-11 = as above but heatrange 5 (factory recommended)

PFR5A-11 = NGK recommended platinum plug for r32 rb engines.


NOTE: For the r32 and r33 engines if buying NGK you need plugs with part number starting BCP, not BK. They look the same but have a different taper. The heatrange 5 is standard, 6 is colder which may be a good idea for more boost, and the recommended gap is 1.1mm, which should be closed up for more boost, which is why .8 gap has been suggested. Its harder for a spark to jump the gap when theres more pressure in the cylinder.

You should have either BCPR5EIX or BCPR6EIX plugs if they are NGK.

[got_boost!]

When I originally got the info, it was in reference to the RB20, but the plugs are the same across all models, so should be good for them all The only difference that comes up is between the R32, R33, and R34. As listed in the post, the R34 has a different taper than the 33 or 32.

[got_boost!]

And on a side note, no one should be thinking of getting the heat range colder. Those are designed for use with a lot of boost, and if you're not running a lot, the plugs will not ever make it up to their propper self cleaning temperature range, and you're going to be replacing your fouled colder range plugs on a very regular basis :P

[TeeDub]

I was recommended and am now running PFR6A-11's in my GTR. I can't remember who recommended them but I got it from this forum.

EDIT: http://forums.gtrcanada.com/viewtopic.php?t=369

[berzerk]

one step colder per every extra 150hp isn't it?

[tyndago]

For pump gas I would recommend one heat range colder. They will be fine. Most people up the boost anyway.

PFR6A-11 is a stock GT-R plug.

For most modified cars - and recommended to me has been heat range 9-10.

I ran Heat range 8 in Big Bird. Marcs car is running 10's. Nicks car is running 9's.

The really cool expensive - hand built NGKs are $30 a plug. R7436-9 actually $31.60 each.

[rickskylinebnr32gtrjp]

I am running 9's as well.

6 are the stock heat range for RB26. The RB20 may be a 5 stock.

[rickskylinebnr32gtrjp]

Have you looked here?:
http://www.ngksparkplugs.ca/

[tyndago]

I am onto 7116-9 and 7116-10's. They are expensive, but a misfire on a hole thats supporting 100 hp is a second in a quarter mile....

[98GS400]

so does anyone know the stock# not jut the part# for the irdiums for the rb26det???? im having problems every where i ask - they wont even look it up unless i have the stock #

:?