Jump to content
SAU Community

Recommended Posts

If you can run the 1.1mm gap without it missing then do it. The bigger gap the better. People only reduce the gap when they are running large boost or have old, weak coils that can't provide a strong enough spark

That's true, only reduce gap if you have to.

NGK BKR6EYA. = 0.8mm

I was running these on 10psi with stock ECU. No Problems.

Installed an SAFC 2 and my Tuner gapped them down to 0.7mm due to old Stock Coils. No Problems.

NGK BKR6EYA-11 = 1.1mm

I will go back up to 1.1mm soon as I just bought some Brand New Stock Coils.

This will be interesting...

That's what I thought.. I will try the 1.1mm gap an see how I go. It only has 140k on the engine so coils might be fine.

Is 1.1mm and 0.8mm the only 2 gaps I can run or should I try lower the gap in 0.1mm increments like as in if 1.1mm doesn't work maybe try 1mm then 0.9 then 0.8 or is that pointless? I'm new to the whole boost scene so excuse my lack of knowledge haha appreciate everyone's help :)

If they are the original coils at 140kms then they will probably be getting a bit weak.

And yes, you can just drop the gap by 0.1mm increments until it doesn't miss

If you want cheap BCPR6ES, get them off eBay

Just buy more than 12 at a time and it works out pretty sweet, $2.90 each delivered

http://www.ebay.com.au/itm/NGK-spark-plug-BCPR6-ES-plugs-BCPR6ES-tradeprice-2330-/330828510503?pt=AU_Car_Parts_Accessories&hash=item4d06ea7527

I just ordered 24 lol, works out to be $2.81 each.. :)

Well the 1.1mm gap works fine. Revs sooo much smoother now. Coils must be good :D Old plugs had a little miss before it revved. Doesnt miss at all during idle or rev. Have no driven it yet to test them under load but all seems fine. Thanks everyone for your help

  • 7 years later...

I've checked alot of places and I can't seem to find BCPR6ES spark plugs with 0.8mm gap I can only find 1.1mm and super cheap say (after rego checko) they are not a right fit for the rb25. After alot of searching and doing my head in I found BCPR6ES with a 0.9mm gap from justjap so that's what I went with... ?‍♂️ Stock rb25

 

3 minutes ago, Kiza said:

I've checked alot of places and I can't seem to find BCPR6ES spark plugs with 0.8mm gap I can only find 1.1mm and super cheap say (after rego checko) they are not a right fit for the rb25. After alot of searching and doing my head in I found BCPR6ES with a 0.9mm gap from justjap so that's what I went with... ?‍♂️ Stock rb25

 

Hmmm. You just set the gap to whatever you want with a very cheap tool.

10 hours ago, Kiza said:

I've checked alot of places and I can't seem to find BCPR6ES spark plugs with 0.8mm gap I can only find 1.1mm and super cheap say (after rego checko) they are not a right fit for the rb25. After alot of searching and doing my head in I found BCPR6ES with a 0.9mm gap from justjap so that's what I went with... ?‍♂️ Stock rb25

 

I use those plugs with 1.1 gap and have zero issues. Drop gap if your coils are shit, otherwise leave at 1.1

So why so hard finding info ? Gapping copper/nickel and platinum plugs is trivial. Iridiums are the only ones you've really got to be careful with. In NGK if it has no - prefix at the end it is like this-

# heat range.

Copper/nickel plugs, the bcpr#es is pregapped to 0.9mm / 36 thou, there is no 0.8mm gap in bcpr#es coppers.

Platinum plugs BCPR#EP and Iridium plugs BCPR#EIX, are pregapped to 0.8mm / 32 thou.

A -11 at the end indicates an 1.1mm / 44 thou gap as an option, available in all of these plugs.

15 hours ago, Kiza said:

I've checked alot of places and I can't seem to find BCPR6ES spark plugs with 0.8mm gap I can only find 1.1mm and super cheap say (after rego checko) they are not a right fit for the rb25. After alot of searching and doing my head in I found BCPR6ES with a 0.9mm gap from justjap so that's what I went with... ?‍♂️Stock rb25

 

Also 5 is stock NGK heat range for RB25, 6 for RB26.

Probably why Repco / Supercrap say it's the wrong plug too.

  • Thanks 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Hows your intake piping? Are you still running stock? Having in the stock AFM position would mean, if the BOV was shut/venting out, it'd create the almost stalling kind of effect right // "the rich pulse behaviour" due to MAF thinking air is flowing ? But this would be better than having the bov in the stock position + MAF on/just before cross over piping right?
    • Essentially, yes. Although I wouldn't put the AFM on the crossover pipe. I'd want to put it into what amounts to the correct size tube, which is more easily done in the intercooler pipework. I bought a mount tube for card stile AFM that replaces the stock AFM - although being a cheap AliExpress knockoff, it had not flange and I had to make and weld my own. But it is the same length and diameter as the stock RB AFM, goes on my airbox, etc etc. I don't have a sick enough rig to warrant anything different, and the swap will take 5 minutes (when I finally get around to it and the injectors & the dyno tune).
    • So to summarise, the best thing to do is to move recirc to between turbo and IC, and maf on the crossover pipe. Meaning I'd need a recirc flange, drill a hole in the piping on turbo outlet area. And drill hole on crossover to fit/weld maf sensor? Either that or put the MAF on the turbo inlet right?  Is an aftermarket recirc/blowoff valve recommended? Do currently have family in Japan so could probably bring something back with maybe a cheeky lil SuperAutobacs run?
    • Yep, so far most have said that it looks like corrosion on the wall from piston not moving. Which then has probably damaged the oil rings and caused those vertical marks. The longest the engine was still after the rebuild, was the winter of 2018 - 2019, plus the boat trip to Japan. When I shipped the car, it had normal gas in the tank but before that winter pause, it had E85 in tank.  In any case, even if either one of those was the cause, it happened close to 6 years ago and the car has been driven something like 30 000kms after the fact. Again, apart from the plugs and the dip stick, there is nothing in the way the car runs that would indicate what has been going on in the engine. I am going to consult a shop and ask their opinion, what would be the best approach. I do have some access to a garage I could use to diagnose further myself, but time is very restrictive. Might end up buying another engine that could be used while this one is being remedied. Without pulling the head, it will be impossible to find out if it needs another bore, but here's to hoping a hone would suffice.  Goddamnit, I would really have preferred this not happening.  
    • Boot is going to be replaced eventually. I just wire brushed what I could and rust converted. Then painted in rust kill primer. the spoiler also got repainted and plugs replaced on the ends. The under side of the bonnet is going to be black also, currently white. But red on the top side, same colour code as the silo to begin.
×
×
  • Create New...