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Spark plug gap

Bobby^

By Bobby^,
in Engines & Forced Induction

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Bobby^ Enthusiast

Bobby^

Posted
Posted

When i first got my car, i got my spark plugs replaced with some laser platinums. I dont remember the workshop regapping them, what gap would these be straight from the packet, before i go and pull them all out?

The are : NGK Laser Platinum Premium - PFR7B 4853

They are a silver pack with "Adjust spark plug gap to engine makers specifications" on the side.

Thanks guys :rofl:

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huffer Newbie

huffer

Posted
Posted

hi every body good forum keep it up just from experience i would not go platinums because the rb series engines have a very weak spark you have to close the gap to .8mm and then sometimes they still misfire under load i have a rb30 vct 25 head and i use a nippondenso spark plug worth $2.50 each and get about 10000 klm out of them they also throw a fatter spark which help to ignite this engine has standard coils and producers up around 400 hp @10 psi @the wheels the plug numbers are k20pru11 or a hotter plug k16pru11 or k20pu11 and k16 pu11 with out the resistor

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Cubes Grand Master

Cubes

Posted
Posted

I remember whatsisname was making around 250rwkw at the time. He went from the BCPR plugs to the BK NGK plugs as apparently thr BCPR's were breaking down.

I generally only ever go the BCPR6E plugs.

They are pre-gapped to 0.8mm and are V-groove plugs.

The BCPR6ES plugs don't have the V-groove. I have had a few problems with these breaking down slightly on 16psi. Well not sure if they are breaking down but yer hessitations.

They can be had from motor traders for $16.80 for 6.

I have in the past ran them up to 30,000km's. They were still fine when I pulled them out and didn't notice any difference with the new plugs.

Obviously higher horsepower (i was only on ~164rwkw) would have them needing to be replaced a lot sooner.

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