 Indexing Spark Plugs, Does this make a difference on out Type 4 Engines? |
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| Highland |
 Jan 26 2023, 03:11 PM
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Senior Member  Group: Members Posts: 513 Joined: 8-August 11 From: San Diego, CA Member No.: 13,418 Region Association: Southern California  |
I just randomly watched a YouTube video on indexing spark plugs. The video says one should have the open end of the gap facing the intake valve. He goes as far as adding spacers so the plug torques at the correct location.
I've never seen anything like that on all the threads here. Does anyone here index plugs? I'm asking this question for any Porsche/VW air cooled engine, but my application is for a 2L 039... head. |
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| Root_Werks |
Jan 26 2023, 05:04 PM
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Village Idiot Group: Members Posts: 8,338 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest 
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(IMG:style_emoticons/default/agree.gif) with Rich, not worth it on any street engine.
If you can find them, both Bosch and NGK make exposed gap plugs. I think Bosch uses the "DTC" in the part number: Attached image(s) 
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Posts in this topic
Highland Indexing Spark Plugs Jan 26 2023, 03:11 PM
914werke perhaps at the 99th% of extracting performance of ... Jan 26 2023, 03:14 PM Arkady The idea of indexing is to orient the spark plug... Jan 26 2023, 07:20 PM
brant Done it on the race car for years until we went to... Jan 27 2023, 07:10 AM |
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