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- From: Frank.Mallory@f417.n109.z1.fidonet.org (Frank Mallory)
- Sender: Uucp@blkcat.UUCP
- Path: sparky!uunet!blkcat!Uucp
- Newsgroups: rec.autos.tech
- Subject: Spark plug specs and old cars
- Message-ID: <719132495.F00002@blkcat.UUCP>
- Date: Wed, 14 Oct 1992 20:44:48 -0500
- Lines: 27
-
- WS> A typical sparkplug (Champion) goes something like RN12YC.
- WS> The R is for resistor, the C for copper.
- WS> Can anyone explain the other parameters?
-
- "N" gives the plug form (14 mm, 3/4" reach), "14" the heat range (14 is very
- "hot"), and "Y" says it's and extended-reach plug (i.e., the nose of the
- insulator extends out of the plug body).
-
- WS> My car lists an N14Y plug (65 Dodge, slant-6).
- WS>
- WS> Can someone explain why resistor plugs are used now, and how the
- WS> added resistance (I measured the resistance of RN12YC to be 30k)
- WS> effects the whole ignition system? (a 25 year old ignition system)
-
- There's another messge here dealing with that. Essentially, resistor plugs last
- somewhat longer due to decreased current across the electrodes, and they reduce
- ignition noise in the radio.
-
- WS> Could I use an N11YC plug? What is the best available match today for
- WS> an N14Y plug?
-
- If your engine is in good shape (not burning oil) and you don't do a lot of
- stop-and-go city driving, you should be able to use the N11Yc. The best match in
- a Champion plug for an N14Y is an N14YC.
-
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