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Registered
Join Date: Aug 2006
Location: Simi Valley
Posts: 64
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What spark plugs for 3.2 ss?
I am in the process of rebuilding the engine in my 78 sc. I'm not sure what spark plugs to run. I have a new set of the ones recommended for a stock 78. Will I have to run different plugs with 9.5 to 1 compression, 98mm p/c and, a 964 cam or will the regular plugs work ok? I don't know if it will make a difference but I live in CA and am limited to crappy 91 octane gas.
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07-02-2007, 05:23 PM
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Insane Dutchman
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I have a Kremer 3.2 (911 SC case, 98mm Mahle P/C's, 9.8 compression, CIS, SSI's, stock cams). I run exclusively on Shell premium 91 octane.
Kremer recommended Bosch W3CC's, I have been running those for years in the silver version - W3CS - and have been trying one grade hotter - W4CS's - no problems. I figured that Kremer would recommend dead cold plugs due to the autobahn driving they would normally experience with their engines in Germany.... Dennis
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1975 911S with Kremer 3.2 1989 911 Carrera Project Car |
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07-02-2007, 06:54 PM
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Registered
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Location: Simi Valley
Posts: 64
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Forgive me for my ignorance. What are the drawbacks running too cold of a plug (fouling?) Is too cold of a plug better than too hot of a plug?
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07-03-2007, 10:04 PM
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Join Date: Jan 2003
Location: Langley,B.C.
Posts: 11,991
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That is a hell of a good question, I am hoping the experts will post their thoughts on this!
I guess a little bit more detail about your motor may be needed. CIS? EFI? CARBS? EXHAUST? CHeers
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Turn3 Autosport- Full Service and Race Prep www.turn3autosport.com 997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3 |
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07-03-2007, 11:23 PM
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Registered
Join Date: Aug 2006
Location: Simi Valley
Posts: 64
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Stock cis with stock exhaust and 964 cam
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07-04-2007, 02:41 PM
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Registered
Join Date: Aug 2006
Location: Simi Valley
Posts: 64
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I ordered the w4cs's today.
Thanks for the advice Dennis |
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07-09-2007, 09:34 PM
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1975 Porsche 911S Kremer 3.2
