Need help installing 13/16 spark plugs...

Why not go copper? Bcr8es I believe.

that's so weird, I ran BKR8EIX's for awhile and so has daveslow. I don't remember running into any socket issues at all...

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OHHHH BKR8EIX is 5/8 hex, BR8EIX is 13/16

So it looks like what you'd need is a BCR8EIX, which doesn't exist in the catalog, since C is 5/8 hex without projected tip.

yeah I would probably not deal with this... chalk it up as a loss and use them on the daily or something. turning a socket and potentially breaking it off in the plug hole is way too much trouble.

If you are just desperate to run those plugs then machine down the hex on the plug, lol.

My thought as well, would take some time, but doable.

Why not coppers? I run br8es plugs in my talon, gapped to .018" at that, and have no issues.

Quote:

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Originally Posted by RealMcCoy

Have you considered running a projected tip, and just running a heat range colder to keep it in line?

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I have, and have a set in right now, but I would prefer to move the spark event back and shield it. I know you know this, the projection will work but is more susceptible to ping. The only reason for the projection is fuel economy and idle. When we start building high dynamic cylinder pressures we want to give the combustion event more room to develop before ignition. Hence, "Retracted" or "non-projected" plugs are most beneficial. I want to move the spark event further out and allow more time for combustion to develop to reduce the possibility of ping.

Quote:

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Originally Posted by donniekak

Why not coppers? I run br8es plugs in my talon, gapped to .018" at that, and have no issues.

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BR8ES is a 13/16" spark plug. See, that's the thing... Evo's, DSM's, Audi, they all have a retracted resistor spark plug for high boost applications. You can't get a thin wall socket around those.

I spoke with an engineer at NGK yesterday, he said NGK does not offer a retracted resistor spark plug with a 5/8" socket receiver. He did suggest using NGK plug# 4554 which is a 5671A-8. He did in-fact state that is a race only application plug and does not have good idle characteristics because it's retracted even further back than the BR8EIX. He also said it has no resistor and the interference may run really high and can possibly cause issues with vehicle electronics. He made additional mention to possible circuit impedance matching issues.

Since no one makes plug to fit I'm now leaning on turning down a socket. For heaven sake it's only 18lbs of tq and I can bench test it first Give me some recc's on stronger sockets I can turn down guy's. I think standard vanadium or whatever is likely too soft. What's a good choice?

Quote:

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Originally Posted by donniekak

Why not go copper? Bcr8es I believe.

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Google shows that these are available through eBay. Mostly in UK but a couple popped up here.

Quote:

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Originally Posted by J. Fast

I have, and have a set in right now, but I would prefer to move the spark event back and shield it. I know you know this, the projection will work but is more susceptible to ping. The only reason for the projection is fuel economy and idle. When we start building high dynamic cylinder pressures we want to give the combustion event more room to develop before ignition. Hence, "Retracted" or "non-projected" plugs are most beneficial. I want to move the spark event further out and allow more time for combustion to develop to reduce the possibility of ping.




BR8ES is a 13/16" spark plug. See, that's the thing... Evo's, DSM's, Audi, they all have a retracted resistor spark plug for high boost applications. You can't get a thin wall socket around those.

I spoke with an engineer at NGK yesterday, he said NGK does not offer a retracted resistor spark plug with a 5/8" socket receiver. He did suggest using NGK plug# 4554 which is a 5671A-8. He did in-fact state that is a race only application plug and does not have good idle characteristics because it's retracted even further back than the BR8EIX. He also said it has no resistor and the interference may run really high and can possibly cause issues with vehicle electronics. He made additional mention to possible circuit impedance matching issues.

Since no one makes plug to fit I'm now leaning on turning down a socket. For heaven sake it's only 18lbs of tq and I can bench test it first Give me some recc's on stronger sockets I can turn down guy's. I think standard vanadium or whatever is likely too soft. What's a good choice?

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I know, you would use bcr8es.

Quote:

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Originally Posted by donniekak

I know, you would use bcr8es.

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I spoke with NGK tech support again this morning. That is a real plug however, it's NGK Japan only.. Ironically that plug is specific to 3000gt and Mini Cooper.

Where do I get this plug?

Quote:

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Originally Posted by familyMAN

Google shows that these are available through eBay. Mostly in UK but a couple popped up here.

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^ eBay