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1. [Healeys] Gunson Colortune (score: 1): Author: Richard Kahn <tahoehealey@hotmail.com>; Date: Wed, 16 Nov 2011 16:47:42 -0800; Has anyone been successful with the Gunson Colortune on their Healey? I'm considering buying one again. I had no luck on my MGB many years ago and gave it away but I have heard so positive about it r; /html/healeys/2011-11/msg00231.html (6,811 bytes)
2. Re: [Healeys] Gunson Colortune (score: 1): Author: "Steve B. Gerow" <steveg@abrazosdata.com>; Date: Wed, 16 Nov 2011 21:54:05 -0800; I bought 2 of them for #2 & 5 sparkplugs. My experience was that when you adjust the mixture to the "bunsen" blue per the instructions, it's way too lean. When the mixture is adjusted to run properly; /html/healeys/2011-11/msg00240.html (6,901 bytes)
3. Re: [Healeys] Gunson Colortune (score: 1): Author: Austin Healey <pajtamuvek@gmail.com>; Date: Thu, 17 Nov 2011 07:31:24 +0100; If You can afford, buy a proper wide brand oxigen sensor and analizer device. I use an Innovate Motorsport LM2, and it is easy to use, and will make carb setting spot on. You can log it, map it, or u; /html/healeys/2011-11/msg00241.html (8,529 bytes)
4. Re: [Healeys] Gunson Colortune (score: 1): Author: Oudesluys <coudesluijs@chello.nl>; Date: Thu, 17 Nov 2011 08:01:43 +0100; I have always been succesful with my Colortunes (I use one for each cilinder simultaniously on my car, ) with a variety of carbs and cars, even on a moped, SU-carbs, DellOrto, Zenith, Stromberg, Bing; /html/healeys/2011-11/msg00242.html (9,082 bytes)
5. Re: [Healeys] Gunson Colortune (score: 1): Author: Oudesluys <coudesluijs@chello.nl>; Date: Thu, 17 Nov 2011 08:09:42 +0100; Problem with exhaust gas analysing equipment with multi carb engines is that you cannot tune the carbs individually, you do not know which carb to work on and when it is set properly. One can be a ta; /html/healeys/2011-11/msg00243.html (9,884 bytes)
6. Re: [Healeys] Gunson Colortune (score: 1): Author: Austin Healey <pajtamuvek@gmail.com>; Date: Thu, 17 Nov 2011 08:18:02 +0100; The device I use is driven by a wideband lambda sensor, which can be put into the downpipes. We have two on the Healey, soo it gives spot-on measurements for each carbs. Some devices can even handle; /html/healeys/2011-11/msg00244.html (11,259 bytes)
7. Re: [Healeys] Gunson Colortune (score: 1): Author: Oudesluys <coudesluijs@chello.nl>; Date: Thu, 17 Nov 2011 09:13:28 +0100; That will indeed help but needs an adaptor on each downpipe. But it still would not work on a tri-carb. Kees Oudesluijs NL Op 17-11-2011 8:18, Austin Healey schreef: _________________________________; /html/healeys/2011-11/msg00245.html (12,425 bytes)
8. Re: [Healeys] Gunson Colortune (score: 1): Author: Per Schoerner <healeyguy@bredband.net>; Date: Thu, 17 Nov 2011 11:21:07 +0100; You are forgetting that the two carburettors are mounted on a common intake manifold, so both carbs feed all 6 cylinders. I theory, and I think also in practice, you would be able to run the engine; /html/healeys/2011-11/msg00246.html (8,904 bytes)
9. Re: [Healeys] Gunson Colortune (score: 1): Author: Oudesluys <coudesluijs@chello.nl>; Date: Thu, 17 Nov 2011 11:54:15 +0100; The two throats are connected with a balancing pipe, which is different. Although there is some influence from one carb to the other, you can still tune using a Colortune or the set up Gergo is using; /html/healeys/2011-11/msg00247.html (10,360 bytes)
10. Re: [Healeys] Gunson Colortune (score: 1): Author: Austin Healey <pajtamuvek@gmail.com>; Date: Thu, 17 Nov 2011 12:03:25 +0100; By theory You are all right, but practicaly the WBO worked perfectly on the car. It reacted at the slightest adjustment of the mixture or alteration of the needle/spring/oil/fuel level. I think under; /html/healeys/2011-11/msg00248.html (10,552 bytes)
11. [Healeys] Gunson Colortune (score: 1): Author: <Josef.Eckert@t-systems.com>; Date: Thu, 17 Nov 2011 11:58:25 +0100; Just to make it clear, the three carb model also has a balance pipe to connect all three intakes, but its much smaller in diameter. But the imperfections on the Austin-Healey engine/carburetter/exha; /html/healeys/2011-11/msg00249.html (9,680 bytes)
12. Re: [Healeys] Gunson Colortune (score: 1): Author: "Steve B. Gerow" <steveg@abrazosdata.com>; Date: Thu, 17 Nov 2011 05:59:50 -0800; I went to an air-fuel meter, the K&N: http://tinyurl.com/76t9dlb I mounted two O2 sensors on the downpipes with a dash switch between the two. I agree this is the best way to go because you can watch; /html/healeys/2011-11/msg00252.html (7,288 bytes)
13. Re: [Healeys] Gunson Colortune (score: 1): Author: Bob Spidell <bspidell@comcast.net>; Date: Thu, 17 Nov 2011 07:16:29 -0800; Unfortunately, no help for us with 'pure' British essence: positive ground (yes, I know some 'Merkin cars were +gnd, too). Bob -- ** Bob Spidell San Jose, CA bspidell@comcast.net ** _________________; /html/healeys/2011-11/msg00254.html (8,819 bytes)
14. Re: [Healeys] Gunson Colortune (score: 1): Author: "BJ8 Healeys" <sbyers@ec.rr.com>; Date: Thu, 17 Nov 2011 10:17:47 -0500; I have used a Colortune for years, and it works just fine. For me, it has been the only satisfactory way of tuning the SU carbs. According to the SU manual, it is only necessary to set the correct mi; /html/healeys/2011-11/msg00255.html (9,600 bytes)
15. Re: [Healeys] Gunson Colortune (score: 1): Author: Austin Healey <pajtamuvek@gmail.com>; Date: Thu, 17 Nov 2011 16:47:01 +0100; You can use it on + ground cars with no problem. Just have to isolate it from the chassis. My car is also + ground. BTW it may be good to point out, that there are two different types of O2 sensors a; /html/healeys/2011-11/msg00256.html (10,026 bytes)
16. Re: [Healeys] Gunson Colortune (score: 1): Author: "Freese, Ken" <Ken.Freese@Aerojet.com>; Date: Thu, 17 Nov 2011 16:21:23 +0000; I tried a single wire and the readings are too erratic. It isn't hot enough. I now have a three wire but not yet installed. Ken Freese I went to an air-fuel meter, the K&N: http://tinyurl.com/76t9dlb; /html/healeys/2011-11/msg00257.html (10,205 bytes)
17. Re: [Healeys] Gunson Colortune (score: 1): Author: Tom <ah3000me@gmail.com>; Date: Thu, 17 Nov 2011 11:45:07 -0500; I found the plastic tube that holds the mirror will melt if you leave it in place too long. Now I use an old Heathkit gas analyzer I bought off Ebay. BJ8's separate the exhaust gases, so I measure th; /html/healeys/2011-11/msg00258.html (10,054 bytes)
18. Re: [Healeys] Gunson Colortune (score: 1): Author: Bob Spidell <bspidell@comcast.net>; Date: Thu, 17 Nov 2011 16:52:56 +0000 (UTC); Would be very interested in exactly how you did this. How do you isolate an O2 sensor? They emit a (very small) voltage signal, referenced to chassis ground, and I was told by K&N tech support that t; /html/healeys/2011-11/msg00259.html (11,001 bytes)
19. Re: [Healeys] Gunson Colortune (score: 1): Author: Bob Spidell <bspidell@comcast.net>; Date: Thu, 17 Nov 2011 16:55:53 +0000 (UTC); Besides setting idle, you can confirm the SU's 'enrichment' system by blipping the throttle. The flame should change from blue to yellow/orange briefly, then settle back to blue when engine speed sta; /html/healeys/2011-11/msg00260.html (10,645 bytes)
20. Re: [Healeys] Gunson Colortune (score: 1): Author: Austin Healey <pajtamuvek@gmail.com>; Date: Thu, 17 Nov 2011 18:07:49 +0100; You dont have to isolate the sensor, only the meter. The sensor is a 3 wire type (heater, sensor, ground). The sensor does not use the exhaust as a ground. Its not theory. Been there done that. Gergo; /html/healeys/2011-11/msg00261.html (12,460 bytes)

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