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1. [Healeys] Tach heat sensitive? (score: 1): Author: Tom <ah3000me@gmail.com>; Date: Thu, 18 Aug 2011 10:43:55 -0400; I've noticed that when I drive to work in the morning when it's cool (50-60F), my tach shows about 2500 RPM at 65 MPH. When I return home at night when it's warm (80+ F), my tach shows about 3000 RPM; /html/healeys/2011-08/msg00427.html (6,390 bytes)
2. Re: [Healeys] Tach heat sensitive? (score: 1): Author: Bob Spidell <bspidell@comcast.net>; Date: Thu, 18 Aug 2011 15:44:51 +0000 (UTC); Mechanical or electronic tach? Bob -- Bob Spidell - San Jose, CA I've noticed that when I drive to work in the morning when it's cool (50-60F), my tach shows about 2500 RPM at 65 MPH. When I return h; /html/healeys/2011-08/msg00428.html (8,220 bytes)
3. Re: [Healeys] Tach heat sensitive? (score: 1): Author: "Dallas Congleton" <dcongleton@embarqmail.com>; Date: Thu, 18 Aug 2011 12:48:31 -0400; Overdrive in use on both occasions ? _______________________________________________ Healeys@autox.team.net Donate: http://www.team.net/donate.html Suggested annual donation $12.75 Archive: http://ww; /html/healeys/2011-08/msg00429.html (8,303 bytes)
4. Re: [Healeys] Tach heat sensitive? (score: 1): Author: Tom <ah3000me@gmail.com>; Date: Thu, 18 Aug 2011 12:56:06 -0400; It's in my BJ8, so it's electrical. Yup, overdrive on at 65mph. - Tom _______________________________________________ Healeys@autox.team.net Donate: http://www.team.net/donate.html Suggested annual d; /html/healeys/2011-08/msg00430.html (8,731 bytes)
5. Re: [Healeys] Tach heat sensitive? (score: 1): Author: "Dallas Congleton" <dcongleton@embarqmail.com>; Date: Thu, 18 Aug 2011 13:15:02 -0400; Are lights used in one direction and not the other? -- Original Message -- From: Tom To: Bob Spidell ; dcongleton@embarqmail.com Cc: Healey Mail List Sent: Thursday, August 18, 2011 12:56 PM Subject:; /html/healeys/2011-08/msg00431.html (8,789 bytes)
6. Re: [Healeys] Tach heat sensitive? (score: 1): Author: "Niels Bengaard" <bengaard@850r.dk>; Date: Thu, 18 Aug 2011 19:24:34 +0200; Dont know if its a common problem, but I have tested three different tachs in my BJ8 and they all have the problem with showing more and more the longer you drive. Always thought it had something to; /html/healeys/2011-08/msg00432.html (8,939 bytes)
7. Re: [Healeys] Tach heat sensitive? (score: 1): Author: Michael Oritt <michael.oritt@gmail.com>; Date: Thu, 18 Aug 2011 13:31:21 -0400; It could be due to the Coriolus effect. Best--Michael Oritt -- On Thu, Aug 18, 2011 at 1:15 PM, Dallas Congleton <dcongleton@embarqmail.com _______________________________________________ Healeys@aut; /html/healeys/2011-08/msg00433.html (10,123 bytes)
8. Re: [Healeys] Tach heat sensitive? (score: 1): Author: Bob Spidell <bspidell@comcast.net>; Date: Thu, 18 Aug 2011 17:38:05 +0000 (UTC); My BJ8's tach did the same (though not quite as extreme). After I calibrated it it has been spot on at all temps and speeds. Bob -- Bob Spidell - San Jose, CA -- Original Message -- It's in my BJ8, s; /html/healeys/2011-08/msg00434.html (8,403 bytes)
9. Re: [Healeys] Tach heat sensitive? (score: 1): Author: "BJ8 Healeys" <sbyers@ec.rr.com>; Date: Thu, 18 Aug 2011 13:47:19 -0400; BJ8 tachs have a tendency for variable response with temperature when they still have their old electronics. A rebuild should fix it, since it did for me. Steve Byers HBJ8L/36666 BJ8 Registry Haveloc; /html/healeys/2011-08/msg00436.html (8,264 bytes)
10. Re: [Healeys] Tach heat sensitive? (score: 1): Author: Bob Johnson <bjsbj8@gmail.com>; Date: Thu, 18 Aug 2011 16:15:04 -0400; Steve, rebuild to old spec with new parts, or with modern technology? for http://autox.team.net/mailman/options/healeys/bjsbj8@gmail.com _______________________________________________ Healeys@autox.; /html/healeys/2011-08/msg00437.html (8,947 bytes)
11. Re: [Healeys] Tach heat sensitive? (score: 1): Author: warthodson@aol.com; Date: Thu, 18 Aug 2011 18:33:10 -0400 (EDT); My BJ8 tach responds the opposite. On a long drive home from Conclave I lost 250RPM from the morning to late afternoon at a constant 70 MPH, in 4th overdrive, with the lights off, as measured by GPS,; /html/healeys/2011-08/msg00438.html (10,187 bytes)
12. Re: [Healeys] Tach heat sensitive? (score: 1): Author: Alan Seigrist <healey.nut@gmail.com>; Date: Fri, 19 Aug 2011 07:17:15 +0800; Is it a BJ8 tach or an earlier mechanical one? -- Sent from my mobile device _______________________________________________ Healeys@autox.team.net Donate: http://www.team.net/donate.html Suggested a; /html/healeys/2011-08/msg00439.html (9,272 bytes)
13. Re: [Healeys] Tach heat sensitive? (score: 1): Author: Greg Mandas <gmandas@yahoo.com>; Date: Thu, 18 Aug 2011 16:32:21 -0700 (PDT); Just a swag here, but my mechanic says my tach is running high because the wire the tach reads is old and therefore has higher resistance (?EE's?) He says he typically runs a new wire, therefore with; /html/healeys/2011-08/msg00440.html (9,053 bytes)
14. Re: [Healeys] Tach heat sensitive? (score: 1): Author: Alan Seigrist <healey.nut@gmail.com>; Date: Fri, 19 Aug 2011 11:07:13 +0800; I'm with greg on this one. That little white wire has the most current and variation in current going through it than any other wire in the car. That creates a situation where that wire will increas; /html/healeys/2011-08/msg00442.html (9,488 bytes)
15. Re: [Healeys] Tach heat sensitive? (score: 1): Author: Oudesluys <coudesluijs@chello.nl>; Date: Fri, 19 Aug 2011 09:05:47 +0200; I am not so sure that the relative small temperature variations will change the resistance of the wire enough to show these variations in indicated rpm. What could change though is the battery voltag; /html/healeys/2011-08/msg00445.html (8,579 bytes)
16. Re: [Healeys] Tach heat sensitive? (score: 1): Author: Alan Seigrist <healey.nut@gmail.com>; Date: Fri, 19 Aug 2011 15:13:08 +0800; I can understand your gut feelings on this, but I've had so much surface resistance build up in this wire in the past, that the ignition on my BJ8 would actually stop working. This was with the alum; /html/healeys/2011-08/msg00447.html (8,845 bytes)
17. Re: [Healeys] Tach heat sensitive? (score: 1): Author: Oudesluys <coudesluijs@chello.nl>; Date: Fri, 19 Aug 2011 10:37:52 +0200; You are talking about an aluminium wire. Would that be the resistor wire in series with the coil acting as a ballast resistor? I hope the rest of the wiring is copper core! Cheers, Kees Oudesluijs [; /html/healeys/2011-08/msg00448.html (7,928 bytes)
18. Re: [Healeys] Tach heat sensitive? (score: 1): Author: "BJ8 Healeys" <sbyers@ec.rr.com>; Date: Fri, 19 Aug 2011 10:57:03 -0400; Bob, I should have said "repair" instead of rebuild. The needle sometimes read high and sometimes low at the same speed. I did not do the repair myself, so I don't know for sure; but I think the part; /html/healeys/2011-08/msg00455.html (8,391 bytes)
19. Re: [Healeys] Tach heat sensitive? (score: 1): Author: Tom <ah3000me@gmail.com>; Date: Fri, 19 Aug 2011 18:41:04 -0400; Thanks to everyone for their help and suggestions. I noticed this last year and thought it was just my imagination. Good to know that the tach is just slightly off with age and my mind is not. - Tom; /html/healeys/2011-08/msg00460.html (9,803 bytes)
20. Re: [Healeys] Tach heat sensitive? (score: 1): Author: JDS <jdshealey64@gmail.com>; Date: Fri, 19 Aug 2011 19:51:26 -0700; Had the same problem years ago and modified capacitor of tach as shown here and solved problem. http://www.healey6.com/Technical/Calibrate%20Tach%201.pdf Jerry http://autox.team.net/mailman/options/h; /html/healeys/2011-08/msg00466.html (10,520 bytes)

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