Options for 18mm sparkplugs

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Options for 18mm sparkplugs

Post  77f150 on May 17th 2014, 5:39 pm

I have DOVE heads and the plate sprays 150/180 through it, I currently have AR32's but wanted a colder non-projected NGK -9, problem is there is precious little I could find for 18mm, 14mm has pages of options. Can you use an adaptor to go from 18mm to 14mm? Are the AR32's safe enough?
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Re: Options for 18mm sparkplugs

Post  dfree383 on May 17th 2014, 5:41 pm

Yes you can get adapters.

The NO2 gurus here would have to answer the question about the plugs.
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Re: Options for 18mm sparkplugs

Post  77f150 on May 17th 2014, 5:51 pm

Perfect, Thank-you!
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Re: Options for 18mm sparkplugs

Post  460bronco on May 17th 2014, 10:07 pm

I bought some adapters from sparkplugadapters.com... I called the guy up and he made me a set for my dove heads that allows the use of a gasketed 14mm 3/4 reach plug. Garret machine also supposedly made the adapters, but I was unable to come up with any. Check out www.sparkplugadapters.com though... The exact adapter is not on the site, but just give the guy a call and he will fix you up! He was very good to work with! Hope this helps.

Jon
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Re: Options for 18mm sparkplugs

Post  77f150 on May 17th 2014, 11:20 pm

460bronco wrote:I bought some adapters from sparkplugadapters.com...  I called the guy up and he made me a set for my dove heads that allows the use of a gasketed 14mm 3/4 reach plug.  Garret machine also supposedly made the adapters, but I was unable to come up with any.  Check out www.sparkplugadapters.com though...  The exact adapter is not on the site, but just give the guy a call and he will fix you up!  He was very good to work with!  Hope this helps.

Jon

Thanks Jon, I was curious what style and depth of plug I would need to work with the head if an adapter was used. The 0.750 in. reach gasket style plug would be exactly what I need, I'll call them Monday.
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Re: Options for 18mm sparkplugs

Post  460bronco on May 17th 2014, 11:44 pm

I'll try to post a pic tomorrow of one of the adapters.
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Re: Options for 18mm sparkplugs

Post  77f150 on May 17th 2014, 11:48 pm

460bronco wrote:Steve Johnson recommended an ngk r5671a-9 to start with... He also said when I work up to my 250 tune that I might want to try a -10 heat range.

It was Steves recommendation for -9 plug that I started on this; I found the NGK Iridium IX BR9ECSIX non-projected tip would work perfectly, -9 heat range and .750 reach to work with an adapter.
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Re: Options for 18mm sparkplugs

Post  460bronco on May 17th 2014, 11:49 pm

Looks like you are on the right track!
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Re: Options for 18mm sparkplugs

Post  77f150 on May 17th 2014, 11:51 pm

460bronco wrote:Looks like you are on the right track!

Only with the help of you guys.
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Re: Options for 18mm sparkplugs

Post  460bronco on May 18th 2014, 8:52 am

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Re: Options for 18mm sparkplugs

Post  Paul Kane on May 18th 2014, 12:30 pm

460bronco wrote:...Garret machine also supposedly made the adapters, but I was unable to come up with any...

Jon
The owner of Garrett Machine has died. I understand that his son has taken over and that there will be changes in the business. It may or may not be possible that there are plug adaptors on their shelf....
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Re: Options for 18mm sparkplugs

Post  rmcomprandy on May 18th 2014, 3:27 pm

Paul Kane wrote:
460bronco wrote:...Garret machine also supposedly made the adapters, but I was unable to come up with any...

Jon
The owner of Garrett Machine has died. I understand that his son has taken over and that there will be changes in the business. It may or may not be possible that there are plug adaptors on their shelf....

I think the adapter shown in the photo is from www.sparkplugadapters.com.

Email: reamcorporation@gmail.com

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Re: Options for 18mm sparkplugs

Post  342g on May 18th 2014, 4:08 pm

I got mine from Garrett.
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Re: Options for 18mm sparkplugs

Post  bbf-falcon on May 18th 2014, 4:10 pm

Harold,are they in the heads i got from you?

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Re: Options for 18mm sparkplugs

Post  77f150 on May 18th 2014, 5:09 pm

I have an e-mail to them and will give a call tomorrow, will post how things go.
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Re: Options for 18mm sparkplugs

Post  342g on May 18th 2014, 8:32 pm

bbf-falcon wrote:Harold,are they in the heads i got from you?

Yes Rick they are.
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Re: Options for 18mm sparkplugs

Post  77f150 on May 20th 2014, 9:14 pm

I just completed the transaction for the adapters with R.E.A.M., John was great to deal with and the whole transaction could not have been easier. Thank-you everyone for your help and pointing me in the right direction. Jon, appreciate your help with the pic as he had your info on file and made getting them done fast.
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Re: Options for 18mm sparkplugs

Post  460bronco on May 21st 2014, 10:45 am

Good deal! Now you will have a ton of plugs to choose from!
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Re: Options for 18mm sparkplugs

Post  bigblockfordfxstb on April 18th 2017, 4:14 am

Hi.

I am also in the process or looking at 18mm plugs for my build. No gas or induction., cast heads some porting, mild cam, intake, exhaust, 10:1 pump gas ... street car not drag.

I can see NGK 6fs range and Autolite 124 plus a ACDELCO 05614094

Would the 6fs be fine?

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Re: Options for 18mm sparkplugs

Post  rmcomprandy on April 18th 2017, 10:16 am

bigblockfordfxstb wrote:Hi.

I am also in the process or looking at 18mm plugs for my build. No gas or induction., cast heads some porting, mild cam, intake, exhaust, 10:1 pump gas ... street car not drag.

I can see NGK 6fs range and Autolite 124 plus a ACDELCO 05614094

Would the 6fs be fine?

IF your engine is happy with the heat ranges available, there will be no problem with running the 18mm stuff except that they are not everywhere to get.
The Accel plug I use is an 0375.

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Re: Options for 18mm sparkplugs

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