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Registered
Join Date: Feb 2003
Location: SF Bay Area, CA
Posts: 1,260
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Need spark plug recommendation
I am finishing a new engine build and need your recommendation for what spec spark plugs to run in the engine. Some information on build:
3 liter with Stock heads and valve size Aascomotorsports valve springs and retainers Compression ratio 10.5 : 1 Elgin 306/288–102 cams Twin plug MSD AL6 S spec MFI Thanks in advance for your responses Cheers, Dan
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DJP; 74 911 3.6 Vram in progress 82 911sc 3.6 street/track 76 930 stock garage queen 84 911 Wide Body 225,000 miles! 72 914 3.0 track; 90 C2 |
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10-31-2021, 09:46 PM
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Join Date: Jun 2000
Location: bottom left corner of the world
Posts: 22,738
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The 82/83 911SC Porsche Technical Specs book shows the WR3CC/WR3CP for the Euro engine.
Or the NGK BPR7ES |
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10-31-2021, 10:48 PM
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Registered
Join Date: Sep 2020
Posts: 409
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Need spark plug recommendation
Hi.
These two are what I have used on my twin plug 3.2 RSR Short Stroke with 10.3:1 CR: Before: NGK BCP7ES Now: NGK BKR7E V-Power Both of these have the smaller Hex-head you will need for the lower plugs. Cheers |
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11-01-2021, 01:57 AM
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Join Date: Feb 2003
Location: SF Bay Area, CA
Posts: 1,260
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Thanks for the recommendations!!
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DJP; 74 911 3.6 Vram in progress 82 911sc 3.6 street/track 76 930 stock garage queen 84 911 Wide Body 225,000 miles! 72 914 3.0 track; 90 C2 |
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11-01-2021, 08:58 AM
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It's a 914 ...
Join Date: Jan 2008
Location: Ossining, NY
Posts: 4,705
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Street only?
Also 12mm lower plugs? |
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11-01-2021, 07:37 PM
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Join Date: Feb 2003
Location: SF Bay Area, CA
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This Engine is going into a 914 that can be driven on the street but is 98% track animal.
No, 14 mm lower. Cheers Dan
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DJP; 74 911 3.6 Vram in progress 82 911sc 3.6 street/track 76 930 stock garage queen 84 911 Wide Body 225,000 miles! 72 914 3.0 track; 90 C2 Last edited by dpegan; 11-02-2021 at 12:03 PM.. |
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11-02-2021, 11:59 AM
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Reiver
Join Date: Nov 2011
Posts: 57,385
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With that compression use a cold plug as Porsche recommends.... for the 930-10 w/ 9.8-1 comp that equates to a NGK 7788 BPR 9 ES not the 7.
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De Oppresso Liber Strength and Honor 5th Legion |
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11-02-2021, 05:52 PM
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Join Date: Oct 2006
Location: MYR S.C.
Posts: 17,321
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start with a cold plug.
especially for track . hotter plugs are needed if you idle a lot, do a lot of city driving or if you have carbs,
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86 930 94kmiles [_  _] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD88 BMW 325is 200K+ SOLD 03 BMW 330CI 220K:: [_ _] RUNNING: [__] NOT RUNNING:01 suburban 330K:: [_ _] RUNNING: [__] NOT RUNNING:RACE CAR:: sold |
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11-04-2021, 06:27 AM
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