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Joined: Jul 2006
Posts: 1,884 Likes: 12
ChatMaster - 1,500
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OP
ChatMaster - 1,500
Joined: Jul 2006
Posts: 1,884 Likes: 12 |
I know this topic had been discussed before but what should the gap be for R-45 Spark Plugs for a 35 Chevy? I know the specs. say .035 but it seems like someone said that at .040 they have more power. Is this correct?
Jon T.
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
I always used the .035" for my '34 and it had good speed and power.
To be honest if there was difference it would be hard to notice.....also from use the gap gets wider and I would stay with the .035' and the suggested gap was actually .032".
Gene Schneider
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Joined: Nov 2001
Posts: 19,758 Likes: 64
ChatMaster - 15,000
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ChatMaster - 15,000
Joined: Nov 2001
Posts: 19,758 Likes: 64 |
I doubt that a wider spark plug gap would make much difference in the '34 and newer engines. Those have spark plugs at an angle directly into the combustion chamber. The early six cylinders have a rectangular pocket the spark plug screws into. It is more difficult to get a high enough gas/air concentration to ignite quickly. So the hotter spark from a wider gap helps ignite the leaner mixture.
How Sweet the roar of a Chevy four!
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Joined: Nov 2008
Posts: 1,513
ChatMaster - 1,500
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ChatMaster - 1,500
Joined: Nov 2008
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Chipper thank you for that explanation of why a .40 gap should be used on early Chevrolets. I did not know that is why you needed it.
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Joined: Oct 2009
Posts: 1,294
ChatMaster - 1,000
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ChatMaster - 1,000
Joined: Oct 2009
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I set my 52 at .040 and it idles much smoother!
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