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AH 3000 sparkplugs

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davidb

davidb

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Evening folks

Quick and dirty question.... (couldn't find anything on the "search" option). Picked up some sparkplugs for my 3000, and purchased NGK BPR 6ES. Then I did a bit of research after the fact and people were making a distinction between hot and cold plugs. I don't race the car and sadly don't put on many miles annually. In your experience are these appropriate, and will they do? Seems from memory, that's what I'm now running, without a problem, but a sober second opinion never hurts...

I recall that the workshop manual specifies Champion, but have never used them.

thanks lads.

DB
 
Pretty much all I've ever used is BP6ES and they perform very well. I think the R stands for 'resistor' for radio noise suppression but I don't have a radio....
Dave
 
The number is heat range: 5-hotter; 6-the usual setup; 7-cold for racers.

It's not good to stack resistances: wires, end caps and plugs can all have resistance. I try to avoid it with non-R plugs, metal wires and plain rubber caps. My only radio is the tinnitus in my left ear and the Healey exhaust note in my right ear.
 
I'm the odd man out I like Bosch Platinum WR7DP, they are resistor plugs too
 
I have Champion resistor plugs in mine, but the NGKs are just fine. I also have bumblebee wire with no resistance.
 
Champion and Bosch use lower numbers for colder plugs. NGK and Denso use higher for colder. Autolite apparently has a system all its own.
 
BP6ES for as long as I can remember (less than a month away from thirty-nine years with BN6L/942).

A couple, okay, three decades ago, I lived in the perfect place to do plug-cuts; I could come down the highway__2-lane rural__at practically any speed/gear/RPM that I wanted, cut the engine, put it in neutral and coast up to the shop (a one time old service station/honky tonk in Poche' Bridge, Louisiana). I had just put the 45 DCOE Webers on it, and following the course of testing and tuning the air/fuel mixture, I also experiments with #5 & #7 plugs. In a nutshell, the #6s were it; 7s might be preferred for hot laps at Sebring, but for 99% of the driving most of us do (Dougie, Derek & Richard being possible exceptions) the NGK BP6ES is my go to plug (they stay cleaner than Champions too; what was that, an N12Y??)/
 
Champions available now are RN12YC; R=Resistor (about 15KOhms, I believe), C=Copper (core).

Sounds like the BP6ES might run just a bit hotter than the Champions. I once had a Subaru that ran BP6ES, and my engine builder likes NGK.
 
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