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-   -   5.5 high compression head (https://www.fordbarn.com/forum/showthread.php?t=324691)

Dkrahn 03-22-2023 09:50 AM
5.5 high compression head
 

With the standard head on my '29 pickup I had autolite 3076 spark plugs. Should I move to different plugs with HC head?

Flathead 03-22-2023 10:24 AM
Re: 5.5 high compression head
 

I use stock A plugs on my 5.5 with no problems.

Jim Brierley 03-22-2023 11:19 AM
Re: 5.5 high compression head
 

Yes, stock. You may want to not run as much spark advance.

Dick M 03-22-2023 11:54 AM
Re: 5.5 high compression head
 

I have very good results with Champion W16Y plugs in my 5.5.

Bruce of MN 03-22-2023 03:32 PM
Re: 5.5 high compression head
 

I limit the advamce travel with this.

goldie 03-22-2023 04:05 PM
Re: 5.5 high compression head
 

Has anyone used a Champion W89D plug? A local "A expert" said to use this plug, used by hill-climb racers? It is a much longer electrode plug for industrial applications, not Model A. I have put about 2000 miles on them so far so good.

The Master Cylinder 03-22-2023 04:39 PM
Re: 5.5 high compression head
 

Quote:
Originally Posted by goldie (Post 2213025)
Has anyone used a Champion W89D plug? A local "A expert" said to use this plug, used by hill-climb racers? It is a much longer electrode plug for industrial applications, not Model A. I have put about 2000 miles on them so far so good.
By the length of porcelain on that plug I would think it would be pretty hot. How does it read?

goldie 03-22-2023 05:06 PM
Re: 5.5 high compression head
 

The plug color looks normal to me, runs fine with Snyder high compression head


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