- 1. New Coil (score: 1)
- Author: Eric Stephen <bk996@freenet.carleton.ca>
- Date: Thu, 06 Aug 1998 15:47:21 -0400
- I'm expecting my new sports coil from George any day now. The "A" is positive ground and I seem to remember that the new coils have a (+) and (-) designation instead of SW and CB. My reading of the m
- /html/mgs/1998-08/msg00330.html (7,554 bytes)
- 2. New Coil (score: 1)
- Author: DANMAS@aol.com
- Date: Thu, 6 Aug 1998 17:14:48 EDT
- Thu, 06 Aug 1998 15:47:21 -0400 Eric Stephen <bk996@freenet.carleton.ca>, Eric, If your coil was designed expressly for a positive ground car, that is correct. If it was designed for a negative groun
- /html/mgs/1998-08/msg00341.html (8,153 bytes)
- 3. Re: New Coil (score: 1)
- Author: BobMGT@aol.com
- Date: Fri, 7 Aug 1998 23:17:22 EDT
- hotter Dan: This makes sense in light of vacuum tube theory. The cathode, which is the heated element, is always negative. The plate is not heated and it is always positive. Electron flow is from the
- /html/mgs/1998-08/msg00393.html (8,169 bytes)
- 4. Re: New Coil (score: 1)
- Author: Barney Gaylord <barneymg@ntsource.com>
- Date: Sat, 08 Aug 1998 00:43:55
- Thought for the day (waxing philosophical): spark plugs are, and, ..... Given due consideration, the polarity of the spark plug is probably not very important. Many newer cars have distributorless ig
- /html/mgs/1998-08/msg00397.html (10,314 bytes)
- 5. Re: New Coil (score: 1)
- Author: ccrobins <ccrobins@ktc.com>
- Date: Sat, 08 Aug 1998 01:30:46 -0500
- Hay Guys, Do we go into the parts house and specify plug polarity for a positive ground MG? ;^) CR
- /html/mgs/1998-08/msg00401.html (8,785 bytes)
- 6. Re: New Coil (score: 1)
- Author: ccrobins <ccrobins@ktc.com>
- Date: Sat, 08 Aug 1998 01:28:06 -0500
- Hi Barney, Don't think I've ever seen a coil on which the case was electrically connected to the windings. Rather, the points side of the coil is connected to both the primary and secondary windings
- /html/mgs/1998-08/msg00405.html (7,760 bytes)
- 7. Re: New Coil (score: 1)
- Author: "Lawrie Alexander" <Lawrie@britcars.com>
- Date: Fri, 7 Aug 1998 07:41:26 -0700
- In part, you wrote............ How, then, is that we successfully test for a defective coil by just connecting the three wires and not attaching the coil to the car? If the original coil was bad, th
- /html/mgs/1998-08/msg00414.html (7,923 bytes)
- 8. Re: New Coil (score: 1)
- Author: DANMAS@aol.com
- Date: Sat, 8 Aug 1998 13:29:10 EDT
- Barney, Bob, Charlie, Lawrie, and others, Some random thoughts on traditional ignition systems: 1) For a given igntion coil, spark intensity drops off as RPM goes up. 2) If a coil has sufficient capa
- /html/mgs/1998-08/msg00422.html (10,783 bytes)
- 9. Re: New Coil (score: 1)
- Author: gofastmg@juno.com (Rick Morrison)
- Date: Sun, 09 Aug 1998 00:55:36 EDT
- Assuming there is suffecient capacity to operate the plugs at 5000 RPM (which in too may cases with original equipment is not true), and thus "excess" capacity at lower RPM, then the whole reason fo
- /html/mgs/1998-08/msg00437.html (14,645 bytes)
- 10. Re: New Coil (score: 1)
- Author: "Harlan Jillson" <hjillson@argolink.net>
- Date: Sun, 9 Aug 1998 07:35:30 -0500
- Very good points. The only thing anyone has left out that I can think of is that the coil, being an auto-transformer is indead polarity sensitive, seeing as how the coils of the transformer are woun
- /html/mgs/1998-08/msg00444.html (12,782 bytes)
- 11. Re: New Coil (score: 1)
- Author: DANMAS@aol.com
- Date: Sun, 9 Aug 1998 15:22:15 EDT
- Can't argue with that. If the stock system is good enough, no need for the high capacity coil. If the new coil gives performance gains, then I think it is safe to say the old coil was NOT adequate. A
- /html/mgs/1998-08/msg00456.html (13,744 bytes)
- 12. Re: New Coil (score: 1)
- Author: DANMAS@aol.com
- Date: Mon, 10 Aug 1998 14:19:59 EDT
- sensitive, Harlan, Good point! This creates a bit of a conundrum, though. They are polarity sensitive in that the output polarity depends on the input polarity, and they are polarity sensitive in tha
- /html/mgs/1998-08/msg00509.html (10,121 bytes)
- 13. Re: New Coil (score: 1)
- Author: mgbob@juno.com (ROBERT G. HOWARD)
- Date: Mon, 10 Aug 1998 16:41:45 EDT
- Hi Dan, In his book MG Tech Talk, Norman Nock writes: "The Negative Spark--Coils are normally wound to give a positive earth spard--that is, the spark plug insulated electrode is negative with respec
- /html/mgs/1998-08/msg00519.html (12,207 bytes)
- 14. Re: New Coil (score: 1)
- Author: BobMGT@aol.com
- Date: Mon, 10 Aug 1998 19:30:27 EDT
- other I believe the plugs must be wired in series. If two plugs were wired in parallel, only one would fire. When a spark occurs the air in the gap ionizes and becomes a low resistance, essentially a
- /html/mgs/1998-08/msg00530.html (9,338 bytes)
- 15. Re: New Coil (score: 1)
- Author: DANMAS@aol.com
- Date: Mon, 10 Aug 1998 21:30:10 EDT
- ionizes would Bob, Good point! It makes a lot of sense, yet if the high tension leads to the two plugs are connected at the HT lead of the coil, as Rick Morrison stated (or as I understood him to say
- /html/mgs/1998-08/msg00531.html (9,350 bytes)
- 16. Re: New Coil (score: 1)
- Author: gofastmg@juno.com (Rick Morrison)
- Date: Mon, 10 Aug 1998 22:51:32 EDT
- Dan and Bob, If I said or lead one to believe that the plug towers are wired parallel, I was definitly wrong. They are wire in series (if that means they would fire at the same time). Harley Davidson
- /html/mgs/1998-08/msg00538.html (11,326 bytes)
- 17. Re: New Coil (score: 1)
- Author: "William M. Gilroy" <wmgilroy@lucent.com>
- Date: Tue, 11 Aug 1998 09:55:35 -0400
- What is the "hall effect" ? -- William M. Gilroy 77 Midget E-mail: wmgilroy@lucent.com Telephone: 732-957-4775 Fax: 732-957-4775
- /html/mgs/1998-08/msg00565.html (8,475 bytes)
- 18. Re: New Coil (score: 1)
- Author: neil.cairns@virgin.net
- Date: Tue, 11 Aug 1998 16:30:42 -0700
- The 'Hall Effect' is the name given to the principle discovered by a chap called, oddly enough, Dr. Hall. It is used in distributors that have a chopper-plate inside instead of points, switching on a
- /html/mgs/1998-08/msg00568.html (9,338 bytes)
- 19. Re: New Coil (score: 1)
- Author: Trevor Boicey <tboicey@brit.ca>
- Date: Tue, 11 Aug 1998 22:48:24 -0400
- Actually, this is somewhat wrong. I think you are confusing optical type "chopper" systems (like Crane/Allison) with Hall effect types, like Lucas/Pertronix. Optical sensors use a chopper disc, which
- /html/mgs/1998-08/msg00599.html (9,723 bytes)
- 20. Re: New Coil (score: 1)
- Author: Barney Gaylord <barneymg@ntsource.com>
- Date: Wed, 12 Aug 1998 01:31:45
- distributor, and a coil-type detector nearby. .... instant the magnet passes the coil. This change is detected by a module which fires the spark. effect isn't noticeable except when the magnets are m
- /html/mgs/1998-08/msg00604.html (10,742 bytes)
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