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beepbeep beepbeep is offline
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Join Date: Jun 2001
Location: Sweden
Posts: 5,564
Yupp. Porsche cenrtified early turbo cars with very cold plugs. Once they figured out that most buyers never took them on track, they somewhat eased out on plug requirements later on (while using esentially same 930 engine).

So W3DPO is cold enough to survive track trashing but easily fouled on street. 5:s are same thing with deeper porcelain recess (thus hotter). How well 5:s work in track enviroment is a question (that I wouldn't seek answer to but rather install colder plugs if racing).

They will last a long time on the street though.
Thank you for your time,
Old 03-26-2008, 06:59 AM
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