Spark Plugs

[R33S2]

I deleted the neo plug in first post, as I could not find it on the nkg website, I've asked before but does anyone know what they are using in the Neo?, the $650 is for NEW stock coils in factory box.

It is confusing yes and with so many things that affect the firing properly I have learnt from this that the best way to track a problem is to check,

1. your coils for cracks and with a multimeter.

2. the plugs for useability and the right gap/heat for the boost you are running.

3. the fuel is the right Ron rating

4. the tuner did a good job of getting it right.

You can cover 123 easily enough but 4 is harder, it is more to do with the timing that is dialed in for the problem phase but would be a rare one I think. And to think all I wanted to know is what plug to use lol.

[dangerous_daveo]

$650 brand new coilpacks I would have thought to be a damn spanking good price.

Either way, with a group buy I dont think its worth it. I went down to my local autobarn (which really arent too bad...) So yeah, went down there. Said I want 12 of these. They said come back in 2 days we'll have them. Low and behold they did. $3.50 each or something. So if group buy fails, you know your going to do 'x' changes a year, just stock up.

[D-limo]

Getting ready for tune on an RB25. Stock comp. Slpitfire coil packs. T04e running 1.1 bar.

Am I better off with BCPR7ES -11's and gapping them down to 1.0 or 0.9?

Or will pre-gapped 0.8 be fine?

[Cubes]

Go the BKR7E.

They are the v-power plug which is better than the std (S) plug.

[D-limo]

Cool... Price?

And what gap?

Cheers

[Cubes]

Have a look over at NGK's web site and check out their part number break down.

The BKR7E plug without a dash something are pregapped at 0.8mm. 0.8mm will be fine.

Throw a -11 on the end and they are 1.1mm.

Also the S on the end will indicate they are a std non v-power plug.

EDIT: They are around $4-$4.50 each.

[D-limo]

Opinions on ideal gap size?

[2gceffy]

i removed V powers from mine n replaced them with bcpr7es which worked great for 2 days them felt yrs old, im gonna gap them to .8 this weekend n see.. got rb25 run bout 10-12psi usualy exhaust the usual did i make right decision n should i gap em down? what do you recomend? thanks

[Cubes]

Not sure.. I found the standards at 0.8mm would feel a tad flat in the top end vs the v-powers at 0.8mm.

I'm not sure if it was this thread but I remember some one mentioned they had to gap the standards slightly smaller than the v-powers to prevent break down.

If you have BCPR7ES then they are already at 0.8mm. If you have BCPR7ES-11 then they are 1.1mm.

For 10-12psi you most definitely want 0.8mm.

[Kinks]

Opinions on ideal gap size?

as large as your ignition system will support. a small spark doesn't set fire to the mixture as efficiently as a big spark. Therefore you should stick with 1.1mm where possible.

however, if your spark gets blown out by running higher boost then you will have to either gap it down or improve your ignition system. guess which method's cheaper!!

[Cubes]

as large as your ignition system will support. a small spark doesn't set fire to the mixture as efficiently as a big spark. Therefore you should stick with 1.1mm where possible.

however, if your spark gets blown out by running higher boost then you will have to either gap it down or improve your ignition system. guess which method's cheaper!!

1.1mm is no good... He will need 0.8mm. Every body who runs boost needs 0.8mm

[Kinks]

1.1mm is no good... He will need 0.8mm. Every body who runs boost needs 0.8mm

either that or buy new coils

Edit - should note that I just gapped my plugs in the 31 down to 0.8 - not worth a full set of coils when gapping is that much cheaper!!

Edited August 2, 2006 by Kinks

[Busky2k]

I'd try 0.9mm first if you're not running over 11psi. The bigger, the better when theres no misfire

[Cubes]

either that or buy new coils

Edit - should note that I just gapped my plugs in the 31 down to 0.8 - not worth a full set of coils when gapping is that much cheaper!!

You'll find even new coils won't make any difference to a good set of coils that are not arcing out.

When I say boost I do mean more than standard. RB20's get away with running a little bigger gap for the boost run.

[Kinks]

You'll find even new coils won't make any difference to a good set of coils that are not arcing out.

I've heard stories go either way - some people say spitfires are the same others say they're a heap better!

[Cubes]

Depends if the origional coils were nackered or not.

If so then yes the spitfires are better.

basically.. If your cars running fine, 12psi or over and running 0.8mm gap, throwing a set of spitfires in isn't going to allow you to run a bigger gap. The spitfire coils are nothing more than stock coils painted blue, they don't offer better performance or anything just a new coil that isn't arcing out on its bracket.

[R33S2]

That is why I went with the new stockos, everyone I asked said the same as Cubes, Splitfires are stock spec.

[2gceffy]

Not sure.. I found the standards at 0.8mm would feel a tad flat in the top end vs the v-powers at 0.8mm.

I'm not sure if it was this thread but I remember some one mentioned they had to gap the standards slightly smaller than the v-powers to prevent break down.

If you have BCPR7ES then they are already at 0.8mm. If you have BCPR7ES-11 then they are 1.1mm.

For 10-12psi you most definitely want 0.8mm.

when i oredered them in i asked for BCPR7ES and on the box they came in there was no -11 at the end so if there already at .8 what should i do? just upgrade to the V-powers? the bit i dont get is why they worked absolutly awesome for 2 days then went ghey... for those 2 days it felt like new car !!

[Cubes]

No idea...

Maybe you got used to it and now it feels slow again.

[2gceffy]

ahaha nar it started the popping again.. il just pull em out on weekend n check the gap