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Post by wayne on Jul 21, 2011 0:21:40 GMT -5
Did a search of the board and couldn't find any info on these variations of the A9 spark plug.
I just bought a box of 9's and they turned out to be EFV's as opposed to EFP's.
Look more or less identical and I'm sure they'll work fine but wondering if anyone knows what the history is.
Wayne
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Post by Jess on Jul 21, 2011 14:50:45 GMT -5
Wayne,
A question that I cannot answer. The P is for platinum. I have a few V plugs, but if I did ask Sam the difference between the P and V, I don't remember...
I miss him daily and am constantly reminder of how little I know. One day, when I have time to go through all his notes, the answer may be in there...
Unfortunatley, NGK is not helpful for information. It has become hard to find someone who will even recognize that they made the darn things in the first place.
Maybe someone else on the board can help.
You stumped me buddy.
Best,
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Post by steve w on Jul 21, 2011 17:09:43 GMT -5
hi the v stands for for fine wire gold palladium centre electrode. and the p stands for premium platinum. hope this helps.
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gerryggg
2nd Gear
I'm Lost In Thought, Please Send a Search Party.
Posts: 225
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Post by gerryggg on Jul 21, 2011 18:00:17 GMT -5
Both these types of center electrode materials have pretty much been replaced by the iridium plugs
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Post by mike500 on Jul 21, 2011 19:34:52 GMT -5
there is also au10efp and my re5 runs so much better in traffic with it.temp runs normal longer before fan kicks in. i.e ngk7 hotter plug ngk10 colder plug
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Post by wayne on Jul 21, 2011 23:05:09 GMT -5
Thanks all.
I find I run better on the 9 in traffic and low speed runs. Curiously individual machines these.
Wayne
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Post by kanonkopdrinker on Sept 29, 2011 13:59:37 GMT -5
Hello Wayne,
A bit late I know, but if memory serves, the A9EFV was the original NGK RE5 plug .... I seem to recall Suzuki issuing a workshop bulletin saying that the new A9EFP should be used in preference, as the A9EFV was prone to 'wetting' ...
One of these days I'll find it. David
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Post by wayne on Sept 29, 2011 14:57:58 GMT -5
Hi David,
Comments always welcome regardless of temporal distance. It seems that the EFV was almost forgotten but you're right, re reading a few old tests that's the plug the early bikes were originally shipped with.
Wayne
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