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Registered
Join Date: Feb 2003
Location: England, Leeds
Posts: 209
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Take a look at these sparkplugs please
Hi guys,
The car is a 73 911 with 2.4 mfi I'm right in the middle of a service and i noticed this... These are the plugs i was given at the shop, under inspection they are 2mm longer than the old ones. Are these plugs going to bash a hole in the top of the piston or will they clear? as always many thanks in advance 
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06-12-2007, 04:00 AM
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Join Date: Mar 2005
Location: Northern CA
Posts: 4,703
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I'm no plug expert, but it looks to me like these are different heat ranges and I would not put them in until triple checking with various sources and turning the engine over by hand before starting.
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Sold: 1989 3.2 coupe, 112k miles |
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06-12-2007, 04:23 AM
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cycling has-been
Join Date: Sep 2004
Location: Jersey Shore
Posts: 7,241
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these are the plugs Porsche specifies for this application:
999 170 128 90 extended tip, old school, wire electrode. resists the typical fouling, but they are $14.00 each from our host. Bill K
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73 911T MFI, 76 912E, 77 Turbo Carrera |
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06-12-2007, 04:34 AM
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Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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Those plugs are just fine,...
 The extended tip design helps keep them clean.
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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06-12-2007, 07:04 AM
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The stock plugs are a projected type like the one on the right, the other's not. I've used both and not noticed any difference.
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2014 Cayman S (track rat w/GT4 suspension) 1979 930 (475 rwhp at 0.95 bar) |
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06-12-2007, 10:07 AM
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Location: Northern CA
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The only thing I don't like about the plug on the right is that it isn't NGK :-)
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Sold: 1989 3.2 coupe, 112k miles |
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06-12-2007, 11:50 AM
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Join Date: Dec 2005
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I know its better, its a Bosch. Bosch plugs also don't blow through the ceramic like NGK and Champions do.
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06-12-2007, 01:48 PM
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Join Date: Mar 2005
Location: Northern CA
Posts: 4,703
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ok, we will see.. I just installed NGK on me 3.2.. runs fine so far keeping my fingers crossed I guess
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Sold: 1989 3.2 coupe, 112k miles |
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06-12-2007, 01:53 PM
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1979 Porsche 930 3.4
