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> Spark Plug Heat Range question, Run a hotter plug with dual carbs? To do or not to do?
UberElectricEagle
post Oct 10 2009, 08:03 PM
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Hello,
Should I, or May I, use a hotter plug with dual carbs? I have NGK B6ES in there right now. One range hotter would be a B5ES, Right? I seem (or think) to remember with my 67 BSA that NGK gets hotter the lower the number.

1.7 liter with dual weber 34 ICT. 009 dist with regular old points.

Many thanks to you.
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Rav914
post Oct 13 2009, 11:15 AM
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QUOTE(Jeffs9146 @ Oct 12 2009, 02:59 PM) *

I had a 67 911 that ran rich and seemed to fowl plugs so I ran plugs that were 1 level hotter and it ran like a champ from then on!


Same here ('67S). A car notorious for fouling plugs. Mostly due to overlapping cams. I briefly tried Bosch and they were ruined in one drive. I think I ran NGK BP5ES and that helped a lot. That and a constant high state of tune; valves and timing down to a knat's ass, and keeping RPM's above 3500.
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