ProCharger, Whipple, etc..and spark plugs question

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11-11-2002, 12:24 PM

Nordicflame

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ProCharger, Whipple, etc..and spark plugs question

I currently run RC12YC Champion plugs in my naturally aspirated 540. I run the gap about .045 with a Crane HI-6 ignition. I'm adding a ProCharger and was wondering if these plugs would still be the preffered choice. Also does the gap change with the blower?
Any recommendations would be appreciated.
Thanks,
Dave

11-11-2002, 03:09 PM

Turbojack

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Normally you would make the gap smaller with a blower, but I am running the 45 gap, I have tried smaller & motor did not idle as good but ran the same on top. I am using the msd box. Ar far as temp range of plug you want a cold plug. I do not like the champion plug from problems I had years ago so I do not know how this plug is rated.

11-11-2002, 03:38 PM

Biggus

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After playing around with several combos the NGK R-5673-8 with the gap at .035 seems to work perfect for me. 750 Hawks.

Kurt.

11-11-2002, 04:16 PM

MIKEHTMSR24

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My dyno guy set plugs at .035 on my N/A 540

11-13-2002, 07:27 AM

Ralph Rast

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Re: ProCharger, Whipple, etc..and spark plugs question

Tip: I have a Procharger M1, besides the noise it's great. But don't run it past 5K rpm (7 # boost) much, I blew mine at 5.5K rpm (~9 # boost at that rpm).