Spark Plug Recommendation

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pickupjoeb
Posts: 1
Joined: May 12th, 2019, 10:19 am

Spark Plug Recommendation

Post by pickupjoeb »

I'm looking for plug recommendations for a 1964 FV Vintage 1200

It has autolite 414 in the engine now and I'm looking to use a Bosh or Ngk plug and looking to see what other people are using.
hardingfv32
Posts: 104
Joined: June 9th, 2015, 8:04 pm

Re: Spark Plug Recommendation

Post by hardingfv32 »

Dyno results indicate that inexpensive Autolites are just as good as the most expensive plugs you can find. Use standard heat range.

Brian
Dietmar
Site Admin
Posts: 631
Joined: June 24th, 2006, 11:56 am

Re: Spark Plug Recommendation

Post by Dietmar »

You asked about NGK, so...

NGK B7HS

Prefer the ones assembled in Japan over the Assembled in the USA only because the Japanese version does not need to have the gap adjusted.

Dietmar
www.quixoteracing.com
sharplikestump
Posts: 183
Joined: January 12th, 2009, 2:28 pm

Re: Spark Plug Recommendation

Post by sharplikestump »

For what it's worth......AND, while this applied a few decades back, I do not know that it is the same situation today:
While all of the plugs have a 14x1.25mm thread, the American made thread has a different radius on the ROOT diameter, or another way to state it is: the bottom of each thread has more of a "U" shape than a "V" shape. IMO, this caused the plug to have a greater tendency to pick up metal from the cylinder head, which then damaged those threads. Again, very long ago, but I never used them for that reason.
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