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spark plugs for pro charged hp 500?

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Old 04-14-2004 | 05:21 PM
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Default spark plugs for pro charged hp 500?

I have a procharged intercooled,carbed hp 500 and need to buy a couple sets of spark plugs it had ngk v power plugs r5674-7 that plug looks like it would be to hot to me but im new to the super charger stuff.any body run that plug with a procharger? I was thinking a little cooler plug like a -8 would be better for this application?
 
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Old 04-14-2004 | 06:55 PM
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#8@ .035
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Old 04-14-2004 | 09:04 PM
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I run B8EFS blown alu head this is a long thread tapered seat non projected tip gaped at 40 work fine. I think the steel heads use the short threads better to be on the cold side on your plugs.
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Old 04-14-2004 | 09:47 PM
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steel heads?? if so i have ran ac mr43t. alum heads ngk r5671a-8 or r5672-8 all worked great also this is not my advice it came from Kieth eickert when he built my motors..
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Old 04-14-2004 | 09:58 PM
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@.040 there is a chance of blowing the spark out. >035 is safer
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Old 04-15-2004 | 06:42 AM
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yes steel heads.so i guess ngk #R5674-8 or ac mr43t.i thought ac plugs were to hard to read because there dark almost black color.THANKS FOR THE REPLYS,SEAN
 
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