 Spark plugs, Copper or platinum, iridium, unobtanium, etc.? |
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| krazykonrad |
 Jan 18 2017, 08:03 AM
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#1
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Senior Member  Group: Members Posts: 1,126 Joined: 21-February 06 From: Canton, GA Member No.: 5,610  |
If I remember correctly, the Cap'n recommended the basic copper-core single-prong spark plugs for our 914s. Any other advice out there?
Also, since we're here, how about for modern engines? Are the super 4-prong iridium fusion-reactor plugs worth it? Thanks, Konrad |
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| mepstein |
Jan 18 2017, 08:29 AM
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#2
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914-6 GT in waiting Group: Members Posts: 19,272 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region 
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Yes, copper for 914's and air cooled 911's.
Modern engines, I have no idea, I imagine follow manufacture recommendations. |
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| Frankvw |
Jan 18 2017, 08:59 AM
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#3
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working on my first 914 ! Group: Members Posts: 651 Joined: 13-April 16 From: Holland, the Netherlands Member No.: 19,896 Region Association: Europe |
for the 914 try to find bosch w7cc. over here the W7 are hard to find, they will try to sell W8 ones instead. Of course there are several NGK options if you do not want to go for a Bosch plug.
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| JFJ914 |
Jan 18 2017, 10:05 AM
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#4
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Senior Member Group: Benefactors Posts: 813 Joined: 13-June 03 From: Alpharetta, GA Member No.: 814 Region Association: South East States 
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IIRC, the Cap'n recommended NGK B6ES or Bosch W7CC.
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| jd74914 |
Jan 18 2017, 10:25 AM
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#5
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Its alive Group: Members Posts: 4,780 Joined: 16-February 04 From: CT Member No.: 1,659 Region Association: North East States |
QUOTE(krazykonrad @ Jan 18 2017, 09:03 AM)  Also, since we're here, how about for modern engines? Are the super 4-prong iridium fusion-reactor plugs worth it? Provided it's stock, I'd go with whatever the OEM recommends since they do spend a ton of money on plug selection. Modern engines are pretty well integrated systems. 914 stuff is like noted above. Copper for the win. (IMG:style_emoticons/default/smile.gif) |
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| Chris914n6 |
Jan 18 2017, 11:02 AM
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#6
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Jackstands are my life. Group: Members Posts: 3,320 Joined: 14-March 03 From: Las Vegas, NV Member No.: 431 Region Association: Southwest Region |
Buy the plugs spec'd during production. If it was ACDelco iridiums then buy those and not the cheaper crap.
The 4 prong are usually spec'd for high pressure direct injection turbo motors. |
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| Mark Henry |
Jan 18 2017, 11:35 AM
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#7
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Copper or solid core only, for some reason aircooleds, both /4 and /6, don't like fancy plugs.
Also Bosch and NGK have rolled threads, plugs like champion have straight cut threads and are more prone to stripping the threads out of the head. |
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| krazykonrad |
Jan 18 2017, 12:18 PM
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#8
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Senior Member Group: Members Posts: 1,126 Joined: 21-February 06 From: Canton, GA Member No.: 5,610 |
QUOTE(Mark Henry @ Jan 18 2017, 09:35 AM) Also Bosch and NGK have rolled threads, plugs like champion have straight cut threads and are more prone to stripping the threads out of the head. Now that's useful information! I remember back in school watching about half the threads vanish into the combustion chamber of my old Nissan 200SX the first time I changed the plugs. |
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