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Bosch 250 P21 Equivilant
The 250 P21 is the spark plug recommended by Stoddard for my engine after they rebuilt it many years ago. Anybody know of an equivilant plug by Bosch or NGK? Thanks. -- Curt
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07-06-2003, 05:46 PM
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Registered
Join Date: Apr 2001
Location: Linn County, Oregon
Posts: 48,521
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NGK B8ES (Ed Mayo suggestion)
NGKB8EV (NGK catalog for :"S") Bosch WR5DP (Bosch replacement for W265P21) as the book called for the '72 S.
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"Now, to put a water-cooled engine in the rear and to have a radiator in the front, that's not very intelligent." -Ferry Porsche (PANO, Oct. '73) (I, Paul D. have loved this quote since 1973. It will remain as long as I post here.) |
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07-06-2003, 05:59 PM
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Paul, with my ultra-low compression (7.5:1), I'm wondering if the 'S' plugs are best. Somebody recommended a WR9DP. I'm wondering if that is close to what Stoddard originally spec'd. -- Curt
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07-06-2003, 06:13 PM
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Well, this is interesting. Pulled the plugs out this morning and 1-4-5 had 250 P21's while the 2-3-6 had W4DP0's! Are these equivilant?
The condition was consistant on all plugs - black, which was expected since the car runs rich. The plugs are at least 3-4 years old. Put in a set of WR5DP and there is a very noticeable difference. We'll see how they hold up. -- Curt |
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07-12-2003, 07:24 AM
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1971 Porsche Targa 2.5L
