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Spark Plug Recommendations?

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62BT7

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I'm up for a tune-up in the next couple of weeks and need to buy some spark plugs for my '62 BT-7. Over the years I've probably used most of the major brands (Champion, NGK, AC). I currently use Bosch Platinums. Frankly I can't say that I've ever noticed a performance difference with various plugs. Nonetheless, has anyone had any noticeable improvements in performance, or perhaps negative experiences with a particular brand? I'm inclined to stick with Bosch but was mulling over the issue and wanted some input, really just curious. Opinions? Thanks,
-Tom
 
Hi 62BT7, IMOP the Bosch Platinum plug is one of the best all around plugs to use. I use the WRDP7 plug and if you use the same they are available on E-bay for ~ $1.25 ea. These are the original Bosch parts. I think the next issue will come from china along with the NGK brand.--Fwiw--Keoke
 
Tom,
I recently looked into this and found a couple of articles that may be of interest to you.
https://www.ntahc.org/techtips/sparkplug1.html
https://www.sparkplugs.com/pdfs/iri.pdf
I chose to go with the NGK BP6ES but longevity is not realy a concern for me. NGK and Denso both list platinum and iridium plugs for our application and I would be interested if others that used these plugs might comment on any increase or decrease in performance as well.
Don
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Use which ever plug you like, but the references contradict their statements. I one breath it is stated that a Platinum electrode will decrease the energy transfer, then in another statement the pointed shape of the platinum NGK will enhance the energy transfer. I wonder who they think pioneered the very small pointed platinum spark plug electrode? which causes energy density to be the highest.??---Fwiw--Keoke-?

--P.S. Hironori Got it right!
 
57_100_6 said:
I chose to go with the NGK BP6ES...
Click to expand...
My number one choice as well.

I've tried BP5ES & BP7ES, but the the #6 always gave the best (plug cut) readings with my setup.
 
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