Spark plug type for 347

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Offline zlat347ci

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zlat347ci
Spark plug type for 347
« on: August 06, 2014, 07:10:15 am »
Guys,

Wanted to see what people reccomend for spark plug type for 347 and gap?

Ive got a mate that used NGK BPR5EFS-13 , these actually come up for vn commodore v6. But run great on his simmular setup.

Anyone running 10mm leads, any benefits?

Car runs msd 6al

Cheers.
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Offline GLENN 70

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Re: Spark plug type for 347
« Reply #1 on: August 06, 2014, 07:41:53 am »
It depends what heads you have . NGK are the go and a 6 heat range unless its a daily driver in traffic and a big carby then a 5 .
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Offline GLENN 70

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Re: Spark plug type for 347
« Reply #2 on: August 06, 2014, 08:26:57 am »
Sorry forgot to answer the other questions . With a msd 6AL plug gap with a engine compression ratio under  or around 10.1 the cap should be about  45 to 50tho ,less for higher compression engines . 8 mm leads are fine 10 if  it's a full on race car .
« Last Edit: August 07, 2014, 08:36:45 pm by GLENN 70 »
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Offline zlat347ci

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Re: Spark plug type for 347
« Reply #3 on: August 06, 2014, 08:38:21 am »
Great thanks Glen. The ngk I quoted are heat range 5.

I might give them a shot see how they go
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Offline GLENN 70

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GLENN 70
Re: Spark plug type for 347
« Reply #4 on: August 06, 2014, 08:44:59 am »
No ,it depends on what heads they are . Get onto the sellers of your heads and see what they say ,and a 6 would be better .
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