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Thread: Spark plugs---which?

  1. #1

    Spark plugs---which?

    I see the W3DPO, but I see others that intrigue me. Like NGK BP8ES and Champion RN9VC. There's even a Denso 4175 and an Autolite AR2594. Any expirience here?

    I monkey around a lot and probably change plugs a couple times a year. So $3 to $13 means something to me. Thanks.

  2. #2
    Dunno if '71 2.2 and the 2.4's use the same plugs, but here's an earlier thread:
    Paul D. Early S Registry #8 - Cyclops Minister of West Coast Affairs
    "Now, to put a water-cooled engine in the rear and to have the radiator in the front, that's not very intelligent." -Ferry Porsche (PANO, Oct. 1973)

  3. #3
    Originally posted by pwd72s
    Dunno if '71 2.2 and the 2.4's use the same plugs, but here's an earlier thread:
    Thanks, Paul. I think I had read that before. They only talk about part of the whole story. I'll try what you have.

  4. #4
    Zeke, I don't know what you went with, but I'm running a colder NGK right now, a 7 (don't remember what letter config. but it's an extended tip model to get it into the swirl) I've tried Champions (ran good), and had Bosch Platinum (non-W3DP0). The car ran like crap with the Bosch plugs, thru them out don't know what they were.
    '71 911S Targa

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