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Spark Plug

neo32

By neo32,
in Engines & Forced Induction

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blind_elk Grand Master

blind_elk

Posted
Posted
have been advised to change to ngk v power racing plug R5671a-7
On what pretence? It's a spark plug. The air/fuel mixture doesn't look at the spark plug and think "he's running R5671a spark plugs - I think I'll generate 20kW extra". It's a spark plug - it ignites the air/fuel mixture after it receives a huge jolt of electricity. It's the same size jolt of electricity, irrespective of the type or manufacturer of the spark plug.

It really doesn't matter what number is stamped on the ceramic, as long as the plug is designed to fit the application.

You will be wasting your money, IMHO.

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SLAPS Rising Star

SLAPS

Posted
Posted

If its the plug I'm thinking they are as cheap as the regular coppers.

I personally didn't notice any difference, if anything it felt a little less punchy but that was most likely in my head. The idea behind the plug I believe is to prevent spark blow out at high combustion pressures.

Grab a set of coppers with a heat range to suit your power and you'll be fine.

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grandmasterb Grand Master

grandmasterb

Posted
Posted
is anyone out there using these in there rb

I run them in mine but the -8's and indexed.

I will be doing a dyno test back to back with mine once final tune is done to show the difference so will post up after its done :)

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Adriano Grand Master

Adriano

Posted
Posted

It sounds like a cop out on behalf of the tuner. A safe rich tune is only rich at high loads, and will still be leaner than a factory setup. there is no reason to be running 12:1 afr at cruise, all it does is wreck fuel economy, catalytic converters, emmissions, cylinder bores and spark plugs

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