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View Poll Results: Which spark plugs should I get for my R33 GTR?
BKR7EIX 35 71.43%
BCPR6EIX-11 6 12.24%
PFR6A-11 8 16.33%
Voters: 49. You may not vote on this poll

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Old 2nd January 2013, 04:14 PM   #21 (permalink)
Silviagtr85 is Gtr31985
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Probably exactly the same plug then,cheers
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Old 31st January 2013, 10:24 AM   #22 (permalink)
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on your setup i think the copper ngk's when gapped right should be ok.
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Old 31st January 2013, 03:59 PM   #23 (permalink)
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on your setup i think the copper ngk's when gapped right should be ok.
I never had any luck with copper plugs, although it was probably just bad coil harness. The harness just gets so cooked in the valley. If you mess with it too much, the connectors all break internally and rattle around. Corrosion on all the connectors. Electricity will find the path of least resistance.






I like what Do Luck did. Run a good 12 V supply, and a good ground to the coils. That would probably cure 90% of the issues out there. Nissan Skyline GT-R s in the USA Blog: RB26DETT Ignition Harness Kit from DoLuck
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Old 31st January 2013, 04:15 PM   #24 (permalink)
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I Always used the copper ngk's. this was in combo with the bleu splitfire coils and a fairly good harness, But I've done many spark changes on rb26 and some indeed just break at the lightest . Im curious about the okada plasma coils.
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Old 24th May 2013, 09:40 AM   #25 (permalink)
saffarco is upgrading his R33
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550whp, rb26dett with 262 cams. What would be good choice among these please? the ones that last longer is better for me..
cheers
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Old 24th May 2013, 03:12 PM   #26 (permalink)
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BCPR8EIX if you can get them locally. That is two heat ranges cooler than stock.
Nissan Skyline GT-R s in the USA Blog: RB26DETT , RB26 Spark Plugs, VR38DETT Spark Plug
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Old 24th May 2013, 04:36 PM   #27 (permalink)
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not available unfortunately. I see that BKR8EIX plugs are identical but 50.5mm high(stock are 53mm I believe), would that be a problem?
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Old 25th May 2013, 12:15 AM   #28 (permalink)
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not available unfortunately. I see that BKR8EIX plugs are identical but 50.5mm high(stock are 53mm I believe), would that be a problem?
I have used ISO plugs. I would prefer to use the right length plug, but there is a spring in the contact at the bottom of the coil. Always have a quick check to make sure the spring/contact is still in the coil when you are doing plugs. I have seen them fall out.

Nissan Skyline GT-R s in the USA Blog: Axeling and Spark Plugging
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Old 25th May 2013, 01:16 PM   #29 (permalink)
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Thanks tyndago..

I don't see nismo plugs 22401-RN010-6/7/8 on this thread. These are ISO and made by NGK, would these be good? I think going ISO is better than JIS, except if I knew why specifically..
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Old 25th May 2013, 09:15 PM   #30 (permalink)
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Thanks tyndago..

I don't see nismo plugs 22401-RN010-6/7/8 on this thread. These are ISO and made by NGK, would these be good? I think going ISO is better than JIS, except if I knew why specifically..
Nissan Skyline GT-R s in the USA Blog: RB26DETT , RB26 Spark Plugs, VR38DETT Spark Plug


There is only a slight difference in lengths in the two plugs. Why? I don't know, but the correct plug for a GT-R is a JIS, which is the longer of the two. With all the issues GT-R's have with plugs, I would rather have the correct one in it.







* R7238-7, 8,9,10.
o Replaced by R7436-7,8,9,10
+ Hand made fine wire racing plug
+ 14mm, 3/4 reach, 5/8 hex, JIS length , fine wire iridium center electrode
R7436-10 part number 4900 $ 38.81 each JIS - I like
R7116-10 part number 3179 $22.34 each ISO - I have used
R7119-10 $33.12 each ISO - Not used - should work
BKR8EIX $7.60 each ISO - Not used - should work
IFR8H-11 $11.71 each ISO - Not used - should work
NGK Racing plug 4898 R7436-8 $41.52
NGK Racing plug 4899 R7436-9 $41.52
NGK Racing plug 4900 R7436-10 $41.52
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Old 31st December 2016, 03:44 PM   #31 (permalink)
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Whilst on the subject, I've got a misfire under boost so thought I'd look up this whole spark plug coil thing, have a look at the video can you identify the coils and what condition do you think the plugs are in? Also do you think these are ok for 1.2 bar 440whp application. Sorry to butt in!

https://youtu.be/65VmcDnrUA8
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Old 1st January 2017, 11:11 PM   #32 (permalink)
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Those coils I would throw away in the bin. They often fail so no surprises there. Get yourself some genuine or Splitfires. Depending on your budget there are other options out there.

Plugs are decent NGK BKR8EIX. ISO so they are about 2.5mm shorter than JIS and might not be allowing full contact with the spring on these cheap particular coils - always a possibility. JIS spec are slightly longer.

Also check your igniter and harness, if stock after 25 years it become oxidised and crimps corrode.
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Old 1st January 2017, 11:14 PM   #33 (permalink)
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What sort of power is it running? Ive always found BPR7ES plugs to be good in my RB25DET, running 480bhp.

These are coppers, she didn't like iridiums at all
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Old 3rd January 2017, 10:46 PM   #34 (permalink)
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Indexing plugs

I was going to revive a dead thread about indexing plugs, but I'll ask here. Worthwhile? I've read that 2 members reported a smother running engine. If the intake is 12 o'clock i aimed all the gaps between 10 and 2 o'clock. It seems to run smoother. Placebo? Anybody have any thoughts?
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Old 9th January 2018, 07:34 PM   #35 (permalink)
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You can't make any wrong with the NGK iridium plugs. Denso plugs are not so good
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Old 9th January 2018, 07:41 PM   #36 (permalink)
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You need to get the right plugs. Many people do not know about JIS vs ISO and it’s differences. Always try an buy a JIS plug as this is 2.5mm longer and will make good contact with the coil. NGK prefix is BCP.

Iridium NGK BCPR7EIX
Iridium fine wire NGK R-7436-7 or 8 is suitable for most cars sub 600 but depends boost and on the climate some go 9.
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Old 9th January 2018, 07:42 PM   #37 (permalink)
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I was going to revive a dead thread about indexing plugs, but I'll ask here. Worthwhile? I've read that 2 members reported a smother running engine. If the intake is 12 o'clock i aimed all the gaps between 10 and 2 o'clock. It seems to run smoother. Placebo? Anybody have any thoughts?
It is called plug indexing. Depends how anal you want to be.
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